EP2195572A1 - Sammelleitung zur leckageüberwachung und leckageortung - Google Patents
Sammelleitung zur leckageüberwachung und leckageortungInfo
- Publication number
- EP2195572A1 EP2195572A1 EP08786842A EP08786842A EP2195572A1 EP 2195572 A1 EP2195572 A1 EP 2195572A1 EP 08786842 A EP08786842 A EP 08786842A EP 08786842 A EP08786842 A EP 08786842A EP 2195572 A1 EP2195572 A1 EP 2195572A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- manifold
- substance
- openings
- collecting line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 230000035699 permeability Effects 0.000 claims abstract description 34
- 239000000126 substance Substances 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 15
- 230000007423 decrease Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 abstract 1
- WHBHBVVOGNECLV-OBQKJFGGSA-N 11-deoxycortisol Chemical compound O=C1CC[C@]2(C)[C@H]3CC[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 WHBHBVVOGNECLV-OBQKJFGGSA-N 0.000 description 28
- 238000009792 diffusion process Methods 0.000 description 14
- 230000035945 sensitivity Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000006163 transport media Substances 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
Definitions
- the invention relates to a manifold for leakage monitoring and leak detection on a system. Moreover, the invention relates to a device of leakage monitoring and leak detection with such a manifold.
- This pipe comprises a pipe, also referred to as an inner pipe, which is impermeable to a substance to be monitored.
- This tube is provided with a plurality of spaced openings in their longitudinal direction, which are parallel to the longitudinal axis of the tube in rows, for example, in the known from DE 34 34 322 Al embodiment.
- a coating is applied around this tube, which is permeable to the substance to be monitored. Through the openings of the tube, a leaking from a leakage in a part of the plant in the environment of the manifold and to be monitored material can get into the manifold. After a certain time, an image of the concentration distribution of the substance to be monitored surrounding the collecting line is thus formed in the collecting line.
- the location of a leak can then be determined, at which the substance has penetrated into the collecting line. This location corresponds to the location (the leak location) at which the substance has leaked out of the system part to be monitored. This is done with a connected to the manifold pump of the penetrated into the manifold fabric together with a carrier gas located in the manifold fed to a likewise connected to the manifold sensor. If the flow velocity is known, the period between the
- the permeability of the substance to be monitored in the course of the longitudinal direction is constant. This is due to the even distribution of the openings in the longitudinal direction and their uniform quality, as well as the homogeneity of all materials used.
- the detection sensitivity decreases with increasing removal of the leak location from the sensor. In other words, the farther the leak location is from the sensor, the higher the concentration of the penetrated substance must be there in order to be able to detect it with the sensor.
- the invention is based on the object to provide a manifold for leakage monitoring and leakage location, in which the decrease in detection sensitivity is reduced with increasing distance from the sensor compared to the known manifold.
- the invention is based on the object to provide a device for leakage monitoring and leak detection with such a manifold.
- the first object is achieved by the invention with a manifold for leakage monitoring and leakage location Thereafter, the manifold has first and second ends and is permeable to a substance to be monitored at least on a longitudinally extending portion.
- This subarea has at least a first and a second subsection.
- the second subsection has a distance from the first end that is greater than the distance of the first subsection from the first end, wherein the transmittance of the first subsection is greater than that of the second subsection.
- the invention is based on the finding that the reduction of the detection sensitivity associated with increasing distance from the sensor is essentially caused by a back diffusion of the substance which has penetrated into the collecting line from the collecting line into the environment to the outside, when it is transported through the collecting line. In this way, the concentration of the substance to be monitored on the way to the sensor decreases and no longer corresponds to the starting concentration, which prevailed at the location of the leakage in the manifold.
- Concentrations of the substance to be monitored in the collecting line which occur at different locations and therefore at a different distance from the sensor, lead to different measured values with regard to the concentration at the sensor.
- Another effect of back diffusion is that with leakage locations very far from the sensor, the concentration of the material entering the manifold must be sufficiently large to allow the sensor to reach a concentration sufficiently high enough to be safely detected during a pump down operation to be able to.
- the collection time ie the time between two pumping operations, must be large enough. This leads to long monitoring intervals to large monitoring time intervals.
- a further advantage of the invention is that, due to the achieved faster diffusion of the substance to be monitored into the collecting line at points remote from the sensor for a given length and detection sensitivity of the collecting line, a shortening of the detection time is effected. Also is one Extension of the manifold at a given detection time possible because at locations further away from the sensor by the improved permeability in these sections a sufficiently high concentration is reached in the manifold, which is evaluable at the sensor.
- the local detection sensitivity along the collecting line can be adjusted by the variation of the permeability.
- the permeability can decrease steadily from the first end to the second end with increasing distance in the longitudinal direction. In this way, the back diffusion in the manifold to the sensor also decreases steadily, so that a uniform
- the manifold comprises a tube which is provided with openings which are closed with a permeable to the substance to be monitored material.
- the tube may be covered by a layer permeable to the substance to be monitored.
- the change in the permeability of the bus in the two sections can be achieved in that the area formed by the openings in the first section is greater than in the second section.
- the openings are arranged in at least one longitudinally aligned row, the production of the apertured tube is simplified.
- the number of rows of openings in the first section is greater than in the second section.
- the number of openings in an opening row in the first section is greater than in the second section.
- Another way to vary the permeability is that the openings in the first section are larger than in the second section.
- the material occluding the openings has a greater permeability in the first section than in the second section.
- the variation in permeability can also be achieved by deviating the composition of the material occluding the openings in the first section from the composition of the material occluding the openings in the second section.
- the second object is achieved according to the invention, with a device for leakage monitoring and leak detection, which contains a manifold according to the invention, at the second end of which a sensor for the substance to be monitored is connected.
- the device has a detection sensitivity even over long distances.
- FIG. 6 shows a manifold according to the invention in a schematic longitudinal section
- FIGS. 8, 9 show a diagram in which the concentration of the substance to be monitored is plotted against the length of a collecting line according to the prior art or a collecting line according to the invention.
- a manifold is shown in longitudinal section.
- a hollow tube 2 is provided at least in a partial area with a plurality of openings 4, which in turn are closed with a material which is permeable to the substance S to be monitored.
- Distance a is in each case the distance between the first end 12 of the manifold and the end assigned to this end. the end of each sub-section.
- a sensor 16 for detecting the substance S is arranged.
- the first section 10 has in this case a higher permeability than the second section 14. This is achieved in the example shown by reducing the number of openings 4 per unit length in the direction of the second end 15. As a result, in the first section 10, the substance S to be monitored passes through the permeable material located in the openings 4 more easily into the interior of the collecting line than in the second section 14. Therefore, the concentration of the substance S to be monitored inside the collecting line in FIG first section 10 faster than in the second section 14 rise, if the concentration of the substance S outside the manifold in the first section 10 would be equal to the concentration of the substance S outside the manifold in the second section 14. If now the content of the manifold is pumped out to a sensor 16, so reduces the concentration of the monitored
- Substance S be increased until a similar concentration, or the length of the manifold would have to be limited in order to limit the amount of back diffusion.
- the permeability is the mean over a given length of the manifold, which in the example of FIG. 1 is dimensioned such that it comprises a multiplicity of openings 4.
- the pitch of the openings 4 increases continuously in the longitudinal direction from the first end 12 to the second end 15, that is, the change in the permeability of the manifold is continuous. But also possible is a gradual change in permeability.
- the entire tube 2 is replaced by one for the one monitoring fabric S permeable layer 6 coated.
- the number of rows of openings 8 takes from the first end 12 forth in the longitudinal direction, with constant spacing of the openings 4 in an opening row 8, seen from. This ensures that in the first section 10, the permeability is greater than that in the second section 14th
- Another possibility for changing the permeability of the collecting line in the sections 10, 14 is the variation of the opening size or the clear width of the openings shown in FIG. 5.
- the first section 10 has larger openings 4 than the second section 14.
- the measures for varying the permeability or opening density shown in FIGS. 3 to 5 can also be combined.
- the layer thickness D increases continuously in the longitudinal direction of the collecting line from the first end 12, even within the partial thickness. sections 10, 14. It would also be possible that the layer thickness D remains constant within a subsection and thereby increases stepwise in the longitudinal direction of the manifold.
- FIG. 7 shows a device with a collecting line according to one of FIGS. 1 to 6.
- a pressure pump 18 is connected, which pumps a located in the manifold transport medium with the eventual leakage in the event of leakage to the sensor 16 connected to the second end 15.
- the manifold is connected to the pump 18 and the sensor 16 so that the first portion 10, which has the distance ai from the first end 12 and is characterized by a higher permeability, further away from the sensor 16, as the second portion 14th with the distance a2 from the first end 12 and the lower permeability.
- measuring results of a collecting line known from the prior art are shown.
- the previously introduced terms in a manifold according to the present invention find corresponding application to the bus of the prior art.
- the concentration C of a substance S, which has penetrated the line S, of a collecting line of length 1 is plotted over the distance a from the first end of the collecting line, when the substance S is transported by the pump 18 to the sensor 1 at a distance of 1.
- the zero point in the coordinate system corresponds to the first end 12 of the manifold.
- the two subsections 10, 14 have identical permeabilities in the prior art bus.
- Curve 32 shows a similar situation in which a substance S has penetrated into the collecting line at a distance a2, so that within the collecting line this substance S is present as a concentration cushion with the concentration C2.
- the concentration pad with the concentration Ci is exposed to a stronger back diffusion.
- the concentration Ci therefore decreases on the way to the sensor 16 to a value Ci S which is lower than the value C 2 s.
- FIG. 9 shows the same situation as in FIG. 8, but with the aid of a collecting line according to the present invention.
- Curve 34 shows a situation in which a substance S has penetrated into the collecting line at a distance ai and a2, so that within the collecting line this substance S is present as concentration cushion with the concentration Ci or C2.
- the substance S together with the transport medium located in the manifold to the second end 15 of the manifold pumped, its concentration gradually decreases by back diffusion, so that at the location of the sensor, the substance S is present only in the concentration Ci S or C2 S.
- the concentration Ci of the substance S to be monitored in the interior of the collecting line at the location ai is greater than the concentration C2 at the location a 2 .
- the back diffusion has a stronger effect on the concentration Ci than on C 2 because of the greater distance to the sensor.
- an equally high concentration Ci S and C2S is measured.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Sampling And Sample Adjustment (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710042160 DE102007042160B3 (de) | 2007-09-05 | 2007-09-05 | Sammelleitung zur Leckageüberwachung und Leckageortung |
| PCT/EP2008/060229 WO2009030565A1 (de) | 2007-09-05 | 2008-08-04 | Sammelleitung zur leckageüberwachung und leckageortung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2195572A1 true EP2195572A1 (de) | 2010-06-16 |
Family
ID=39768212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08786842A Ceased EP2195572A1 (de) | 2007-09-05 | 2008-08-04 | Sammelleitung zur leckageüberwachung und leckageortung |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8875563B2 (de) |
| EP (1) | EP2195572A1 (de) |
| AR (1) | AR068208A1 (de) |
| BR (1) | BRPI0810824A2 (de) |
| CA (1) | CA2676657C (de) |
| DE (1) | DE102007042160B3 (de) |
| WO (1) | WO2009030565A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013221799B3 (de) * | 2013-10-28 | 2015-02-05 | Areva Gmbh | Schlauch oder Rohr zum Transport einer Gasprobe |
| CN104483075B (zh) * | 2014-12-30 | 2017-02-22 | 马鞍山仪达空调有限公司 | 一种高检测效率的车用空调检漏装置 |
| US11435252B2 (en) | 2018-05-01 | 2022-09-06 | Baker Hughes, A Ge Company, Llc | Gas sensor system |
| KR102170028B1 (ko) * | 2018-11-27 | 2020-10-26 | 한국원자력연구원 | 습도센서 센서튜브 및 이를 이용한 습도센서 어셈블리 |
| CN112206455A (zh) * | 2020-09-10 | 2021-01-12 | 云南省设计院集团有限公司 | 一种自喷管网埋地暗管漏损定位系统和方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2431907C3 (de) * | 1974-07-03 | 1978-03-09 | Wolfgang Dipl.-Phys. Dr.- Ing. 7500 Karlsruhe Issel | Verfahren und Vorrichtung zur Bestimmung von Konzentrationsprofilen flüssiger oder gasförmiger Stoffe längs einer Strecke |
| DE2734608C2 (de) * | 1977-08-01 | 1982-06-03 | Bergwerksverband Gmbh, 4300 Essen | Anströmboden für Wirbelrinnen |
| DE3434322C2 (de) * | 1984-09-19 | 1986-08-14 | Wolfgang Dipl.-Phys. Dr.-Ing. 7500 Karlsruhe Issel | Hohle Leitung zur Anwendung bei der Bestimmung von Konzentrationsprofilen flüssiger oder gasförmiger Stoffe |
| EP0175219B1 (de) * | 1984-09-19 | 1988-05-11 | Wolfgang Dr.-Ing. Issel | Hohle Leitung zur Anwendung bei der Bestimmung von Konzentrationsprofilen flüssiger oder gasförmiger Stoffe |
| US5046353A (en) * | 1989-01-26 | 1991-09-10 | Tracer Research Corporation | Underground pipe leak detection system |
| DE102005023255A1 (de) * | 2005-05-20 | 2006-11-30 | Areva Np Gmbh | Sammelleitung zur Leckageüberwachung und Leckageortung |
-
2007
- 2007-09-05 DE DE200710042160 patent/DE102007042160B3/de not_active Expired - Fee Related
-
2008
- 2008-08-04 BR BRPI0810824-2A2A patent/BRPI0810824A2/pt not_active Application Discontinuation
- 2008-08-04 EP EP08786842A patent/EP2195572A1/de not_active Ceased
- 2008-08-04 WO PCT/EP2008/060229 patent/WO2009030565A1/de not_active Ceased
- 2008-08-04 CA CA2676657A patent/CA2676657C/en not_active Expired - Fee Related
- 2008-09-05 AR ARP080103856 patent/AR068208A1/es not_active Application Discontinuation
-
2009
- 2009-06-05 US US12/479,246 patent/US8875563B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009030565A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0810824A2 (pt) | 2014-10-21 |
| US20090293591A1 (en) | 2009-12-03 |
| US8875563B2 (en) | 2014-11-04 |
| AR068208A1 (es) | 2009-11-11 |
| DE102007042160B3 (de) | 2008-10-23 |
| CA2676657C (en) | 2015-04-21 |
| WO2009030565A1 (de) | 2009-03-12 |
| CA2676657A1 (en) | 2009-03-12 |
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| DAX | Request for extension of the european patent (deleted) | ||
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Owner name: AREVA GMBH |
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