WO2012062484A1 - Contrôle d'étanchéité de systèmes de tuyauterie pour des installations de lutte contre les incendies - Google Patents

Contrôle d'étanchéité de systèmes de tuyauterie pour des installations de lutte contre les incendies Download PDF

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Publication number
WO2012062484A1
WO2012062484A1 PCT/EP2011/053975 EP2011053975W WO2012062484A1 WO 2012062484 A1 WO2012062484 A1 WO 2012062484A1 EP 2011053975 W EP2011053975 W EP 2011053975W WO 2012062484 A1 WO2012062484 A1 WO 2012062484A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
pressure
volume flow
piping system
actual
Prior art date
Application number
PCT/EP2011/053975
Other languages
German (de)
English (en)
Inventor
Dirk Sprakel
Ulrich Hiltemann
Max Lakkonen
Original Assignee
Fogtec Brandschutz Gmbh & Co. Kg
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 Fogtec Brandschutz Gmbh & Co. Kg filed Critical Fogtec Brandschutz Gmbh & Co. Kg
Priority to EP11708475.6A priority Critical patent/EP2638377A1/fr
Publication of WO2012062484A1 publication Critical patent/WO2012062484A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—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
    • G01M3/2815—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 pressure measurements
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment

Definitions

  • the subject matter relates to a method and a system for leak testing of dry pipeline systems in
  • Firefighting systems are usually divided into wet and dry systems. Wet plants are characterized by the fact that extinguishing fluid is permanently stored in their pipelines. In case of fire, the pressure of the
  • Loschfluids increased in the pipelines and possibly opened valves to discharge liquid can be discharged from extinguishing nozzles in the field of fire. In itself dry
  • the pipes are filled with air or gas.
  • the extinguishing fluid is first pumped into the pipes and from there to the extinguishing nozzles
  • Piping system does not immediately extinguishing fluid from the
  • the extinguishing fluid is applied at the location of the source of the fire. Rather, a part or everything
  • the object was the object of a method and a system for leak testing of per se dry piping systems, especially in
  • Rail vehicles to make available which makes a leak detectable in a particularly simple manner.
  • This object is achieved according to a first aspect by generating a gas pressure in the piping system, detecting an actual gas pressure and / or an actual gas volume flow in the piping system, comparing the detected actual gas pressure with a desired gas pressure and / or comparing the detected Actual gas volume flow with a desired gas volume flow, and outputting a warning signal upon detection of a deviation of the actual gas pressure from the target gas flow rate. Gas pressure and / or the actual gas volume flow of the desired gas volume flow.
  • gas only exits or enters from the open nozzles, so that a setpoint can be determined.
  • the test pressure can be a negative pressure or an overpressure.
  • a leak can be determined. For this purpose, it can be determined whether a gas volume flow is produced by escaping or entering gas. It can also be determined whether there is a temporal pressure gradient, ie the pressure in the interior of the pipeline changes. A comparison of a desired pressure gradient with an actual pressure gradient allows leakage detection.
  • gas also leaks out of the nozzles in the case of the gas overpressure in the pipe paring system.
  • Piping system enters through these nozzles gas. However, it can be measured or calculated how large the amount of gas that can leak from the open nozzles in a leak-free piping system. With the help of this
  • the target gas pressure can be determined. Also is it is possible to measure or calculate the nominal gas volume flow.
  • Piping system a gas pressure can be used with a certain pressure and it can be measured which one
  • volume flow flows at a measuring point.
  • the volume flow is determined from the gas, which is the sum of all
  • Openings in the piping system in particular the openings provided by the nozzles, flows.
  • the piping system has, in addition to the openings through the nozzles, at least one opening in the region of the leakage, through which gas likewise enters and exits, whereby the gas volume flow at the measuring point can be increased. In this case, an actual gas volume flow deviates from the desired gas volume flow.
  • Piping system can be done regularly at certain intervals. So it is possible, for example, that once a day or once a week, the gas pressure is generated and the actual gas pressure or the actual gas volume flow is measured. If there are deviations from the setpoint values, a
  • open nozzle systems often use open nozzle bodies in open pipeline systems. Open nozzle bodies are characterized by the fact that the nozzles or nozzle inserts not
  • Relative pressure within the piping system to the ambient pressure is. In the case of overpressure can thus escape gas from the piping system through the nozzle body.
  • the pressure drop or the volume flow of the gas which emerges from the nozzle body can be measured and / or calculated.
  • To calibrate the system can, for example, immediately after assembly, for example, the gas pressure on the
  • Piping system are given and measured at a measuring point of the gas pressure or the gas flow rate. This usually corresponds to the nominal gas pressure or the nominal gas volume flow, since immediately after assembly no
  • the pipeline system can be put into operation and in the case of a test, the previously measured target gas pressure or desired gas flow rate can be compared with an actual gas pressure or actual gas volume flow measured during the test period. If the values deviate from each other, something has changed in the area of the pipeline system,
  • the ambient temperature can be taken into account. Different ambient temperatures result in different gas pressures or gas volume flows, so that a deviation of the actual values from the desired values without leakage in the piping system can occur, for example under changed temperature conditions in the
  • Comparison of the actual values with the desired values can then take place taking into account the mentioned variations, so that a deviation of the actual value from a target value, which is dependent on changed environmental conditions,
  • the target gas pressure and / or the nominal gas volume flow is measured with A) open range valves and / or B) at least partially closed range valves, wherein the range valves a main line of the
  • Main can be, for example, through a whole
  • Vehicle and a wagon extend and thereof, branched off by valves, divide area lines.
  • the nozzle body can be connected. Area management makes it possible to move a larger surveillance area into smaller units
  • Test routine to be controlled in the first all area valves are closed, and then partially the
  • Range valves are opened, in each case the actual value is compared with the target value. It is also possible to open all range valves and the actual values at a
  • the actual gas pressure and / or the actual gas volume flow is measured, each with an open range valve and / or with fully closed range valves.
  • the measured actual values can be compared with the corresponding setpoint values, the setpoint values being calibrated with a corresponding open or
  • closed area valves have been determined. Thus, in some areas a review of the piping system can take place. With completely closed range valves, a check of the main line is thus possible and with each open range valve, the check of the respectively open range. Checking for leaks is improved by measuring the actual values over a longer period of a measurement interval. For example, it is possible to measure the time variation of the actual gas pressure within a measuring interval.
  • a gas overpressure which is initially 5 bars, decreases by 1 bar within a 5 minute period. This pressure decrease is due to openings in the
  • Pipe system which are given for example by nozzle body.
  • This temporal change can be based on the target values, for example in the form of a desired value profile which determines the gas pressure over time
  • the measured actual values (the actual value profile) can then be compared with the desired values and, in the event of a deviation within the measuring interval, it is possible to conclude that an undesired leakage has occurred.
  • the gas volume flow can, for example via a
  • Measuring interval measured and a setpoint curve (setpoint profile) are detected.
  • the gas flow rate may decrease over time as the gas pressure through the orifices of the nozzle bodies also decreases.
  • the gas overpressure is provided via a pressurized gas container, the change in the gas volume flow or the gas pressure may result.
  • the gas pressure is generated by means of a compressed gas container and / or a pump and / or a pressure generating device of the rail vehicle. It is also possible for the gas pressure to be generated by a pressure generating device, eg a compressor, which is self-sufficient by the rail vehicle.
  • the printed product device can also serve as the sole pressure source without pressure accumulator.
  • the compressed gas container can be connected via a valve with the piping system and that in the compressed gas container gas can be in the
  • Pressure generation directions for example, to operate the brakes or clutches.
  • Pressure generating devices can be used to fill the compressed gas containers for test purposes, so that no further means for filling the gas cylinder is necessary.
  • nozzle bodies connected to the pipeline system are closed in such a fluid-tight manner by means of caps and / or rupture disks that in the case of
  • Nozzle enters the piping system.
  • the gas pressure that can be applied to the piping system for testing purposes may be selected to be less than the bursting pressure of the bursting disks. In this case, the bursting discs do not burst and the pressure within the
  • Pressure change can be detected and possibly evaluated as an indication of a leak.
  • Nozzle bodies should leak. However, if the volume flow is greater than a certain limit, it can be concluded that there is a leak.
  • the caps can, for example
  • Teflon caps that have a sufficient seal of the
  • nozzle bodies connected to the piping system are closed by a check valve in such a way that in the case of a negative pressure in the
  • Nozzle body enters the piping system, however, in the case of a fluid pressure in the piping system fluid exits through the nozzle body from the piping system.
  • the check valve may be designed to close at a negative pressure in the piping system. Then, a gas from the environment may enter the piping system through the valve. Thus, a leakage test can be performed.
  • extinguishing fluid e.g. Water
  • This pressurized fluid causes the check valve to open causing the fluid to exit through the nozzle orifices.
  • a check valve can between main and
  • the gas with which the overpressure is generated is substantially free of impurities.
  • the gas with which the overpressure is generated can be any gas with which the overpressure is generated.
  • Piping system introduced by the tests on leaks air moisture, which is reflected on the pipes and possibly leads to rust or encrustations. This must also be prevented.
  • test guest which is olfactorily detectable. This can be either a gas with a natural odor or even a gas which is mixed with odors. Then a leakage detection can also be additionally detected by "sniffing".
  • Another object is a leak testing system according to claim 10.
  • the piping system advantageously has two ports that can be used separately.
  • a first connection is connected to a fluid supply device, via which the extinguishing fluid can be brought into the pipeline.
  • a second connection, separate therefrom, is intended, for example, for pressure generating means with which the gas pressure is brought into the pipeline system for test purposes.
  • the object is based on a
  • Fig. 1 shows schematically a piping system with a
  • FIG. 2 shows a nozzle body with a rupture disk
  • Fig. 3 shows a sequence of a method according to a
  • FIG. 1 shows a piping system 2 with a thereto
  • the piping system 2 is formed of a main pipe 2a and region pipes 2b connected thereto.
  • Main line 2a is connected to the area lines 2b via
  • Pressure generating means 6 have a
  • Pressure generator 6a and a pressure tank 6b Pressure generator 6a and a pressure tank 6b.
  • the pressure generating device 6a may be, for example, a pump. Also, it is possible that the
  • Pressure generator 6a a connection with
  • Pressure generating means of the rail vehicle and thus has the high-pressure pump of the rail vehicle, which is needed for example for the hydraulic system uses.
  • Pressure generating means 6 are connected via a valve 10 and a port 12 to the main line 2a of the piping system 2.
  • the main line 2a is further connected to the extinguishing fluid supply 4, which is connected via a valve 14 to a high-pressure cylinder 16. In case of fire will not with one
  • the shown fire detector detects a fire and transmits an activation signal to the valve 14.
  • the valve 14 opens and the extinguishing fluid stored in the extinguishing fluid supply 4 is driven by means of high pressure from the high-pressure cylinder 16 from the container 4 into the pipe 2a.
  • one of the area valves 8a, b is opened and the extinguishing fluid can escape through the extinguishing nozzles 22 connected to the area lines 2b and thus fight the fire.
  • a calibration routine may be performed.
  • a defined pressure on the pressure tank 6b and the valve 10 is first given to the piping system 2.
  • Sensor 18 is arranged in the pipeline system 2, which can measure the pressure in the pipeline system 2 and / or the volume flow in the pipeline system 2.
  • the area valves 8a, b are completely closed or opened and in each case the pressure or the volume flow in the
  • the measurement of the pressure in the pipeline system 2 with closed range valves 8 will be described.
  • the pressure tank 6b is filled with gas at a defined pressure via the pressure generating means 6a.
  • the connection between pressure generating device 6a and pressure tank 6b is closed and via a control computer 20, the valve 10 is opened.
  • the valve 10 is opened.
  • Gas pressure in the pressure tank 6b is distributed to the main line 2a.
  • the gas pressure in the Main line 2a measured. It is possible to measure a pressure profile over a period of time. In a completely dense system, the pressure remains constant. For tolerated leaks, the pressure gradually decreases, the
  • the pressure profile is stored as desired gas pressure in the control computer 20. Subsequently, the valve 10 is closed via the control computer 20 and the piping system 2 and the
  • Main line 2a vented, so that there is a normal pressure in the main line 2a.
  • the area control valve 8a can be opened via the control computer 20 and at the same time the pressure tank 6b can be filled again via the pressure generating device 6a.
  • the connection between the pressure generating device 6a and the pressure tank 6b is closed and the control computer opens the valve 10. The gas pressure from the pressure tank 6b then escapes into the main line 2a and via the area valve 8a in the
  • Pipeline 2a are measured. This volume flow results from the gas escaping from the nozzles 22.
  • Volume flow can be used as a target value in the control computer
  • control computer 20 may periodically,
  • the nozzles 22 are shown by way of example in FIG. 2. On the one hand it is possible that the nozzles are completely open, allowing gas from the pipeline directly through the
  • Nozzle openings 22a can escape.
  • the nozzles are connected to the pipe via a rupture disk 22b, wherein the rupture disk 22b seals the nozzles 22a with respect to the pipe.
  • the nozzle 22 in the test case also no gas
  • Rupture discs 22 is sealed.
  • Pressure tank 6b filled via the pressure generator 6a with gas at a certain pressure. Subsequently, the control computer 20 controls the valves 8 a, 8 b in such a way that they close and the valve 10 is opened by the control computer 20.
  • the sensor 18 measures (36) the pressure in the pipe 2a
  • Control computer 20 compared with a desired profile (38). If the measured actual profile differs from the nominal profile, a
  • Warning message 40 issued. If the actual profile lies within a tolerance range in the nominal profile, the control computer 20 is activated
  • step 34 it is decided to perform a volumetric flow measurement.
  • Main line 2a and the area line 2b from the nozzle 22 Main line 2a and the area line 2b from the nozzle 22.
  • the thus escaping gas represents a desired opening and causes a volume flow in the pipe 2a, which is allowed. Only in the event of leakage either in the main line 2a or the area line 2b would more gas escape than would be the case via the nozzles 22. This led to an increased volume flow, which would be detected in a subsequent comparison (48) with a nominal volume flow. If the measured volume flow deviates from the setpoint volume flow, a warning signal is output again (40), otherwise the lines 2a, 2b are again emptied (42).
  • the method described can be with High pressure and run with low pressure, with a
  • High pressure for example, over 5 bar, more preferably above 10 bar, in particular more than 60 bar and a low pressure is below the above ranges.
  • the nozzles 22 may be closed with rupture disks 22b as well as Teflon caps (not shown). In these cases, primarily pressure profiles are recorded and no volume flows, since these are likely to occur only in the event of a leak.
  • the system described can be used particularly advantageously in rail vehicles, as they regularly with

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

L'invention concerne un procédé et un système pour le contrôle d'étanchéité de systèmes de tuyauterie secs (2) dans des installations de lutte contre les incendies, en particulier dans des véhicules ferroviaires, consistant à produire une surpression de gaz dans le système de tuyauterie (2), à détecter une pression de gaz réelle et/ou un débit volumique de gaz réel dans le système de tuyauterie (2), à comparer la pression de gaz réelle détectée à une pression de gaz nominale et/ou à comparer le débit volumique de gaz réel détecté à un débit volumique de gaz nominal. Pour détecter une fuite, selon l'invention, un signal d'alerte est produit si la pression de gaz réelle est différente de la pression de gaz nominale.
PCT/EP2011/053975 2010-11-08 2011-03-16 Contrôle d'étanchéité de systèmes de tuyauterie pour des installations de lutte contre les incendies WO2012062484A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11708475.6A EP2638377A1 (fr) 2010-11-08 2011-03-16 Contrôle d'étanchéité de systèmes de tuyauterie pour des installations de lutte contre les incendies

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010050505.6 2010-11-08
DE201010050505 DE102010050505A1 (de) 2010-11-08 2010-11-08 Dichtheitsprüfung von Rohrleitungssystem für Brandbekämpfungsanlagen

Publications (1)

Publication Number Publication Date
WO2012062484A1 true WO2012062484A1 (fr) 2012-05-18

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PCT/EP2011/053975 WO2012062484A1 (fr) 2010-11-08 2011-03-16 Contrôle d'étanchéité de systèmes de tuyauterie pour des installations de lutte contre les incendies

Country Status (3)

Country Link
EP (1) EP2638377A1 (fr)
DE (1) DE102010050505A1 (fr)
WO (1) WO2012062484A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2513010A (en) * 2013-03-21 2014-10-15 Paradigm Flow Services Ltd Water deluge system testing apparatus and method
US20160001113A1 (en) * 2013-02-27 2016-01-07 Luphi B.V. Method and Device for the Testing of Fire Extinguishing Systems
CN108763809A (zh) * 2018-06-07 2018-11-06 中国石油大学(北京) 一种复杂输油管道系统在泄漏事故时的停输方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013216450A1 (de) 2013-08-20 2015-02-26 Inficon Gmbh Pico-Prüfleck
EP2881149B1 (fr) * 2013-12-04 2018-02-28 Amrona AG Installation de réduction d'oxygène et procédé de fonctionnement d'une installation de réduction d'oxygène
CN115463365A (zh) * 2017-03-30 2022-12-13 浙江中互网络科技有限公司 一种全方位火险预警灭火系统
CN107576458A (zh) * 2017-09-26 2018-01-12 安徽安凯汽车股份有限公司 一种汽车制动管路气密性自动检测装置及其检测方法
CN113348350A (zh) * 2019-01-28 2021-09-03 奥布拉马提克股份公司 检测管线系统中的泄漏的方法以及用于执行该方法的控制系统
GB2597438B (en) * 2020-06-08 2024-02-07 Paradigm Flow Services Ltd Apparatus and method for testing a fire suppression system

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US5971080A (en) * 1997-11-26 1999-10-26 Central Sprinkler Corporation Quick response dry pipe sprinkler system
US20100263882A1 (en) * 2009-04-16 2010-10-21 South-Tek Systems System and method for fire protection system corrosion mitigation

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DE202005013281U1 (de) * 2005-08-22 2006-01-12 Fogtec Brandschutz Gmbh & Co. Kg Trockenvorgespanntes Löschsystem für Schienenfahrzeuge

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Publication number Priority date Publication date Assignee Title
US5971080A (en) * 1997-11-26 1999-10-26 Central Sprinkler Corporation Quick response dry pipe sprinkler system
US20100263882A1 (en) * 2009-04-16 2010-10-21 South-Tek Systems System and method for fire protection system corrosion mitigation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160001113A1 (en) * 2013-02-27 2016-01-07 Luphi B.V. Method and Device for the Testing of Fire Extinguishing Systems
US9724549B2 (en) * 2013-02-27 2017-08-08 Luphi B.V. Method and device for the testing of fire extinguishing systems
US10010734B2 (en) 2013-02-27 2018-07-03 Luphi B.V. Method and device for the testing of fire extinguishing systems
GB2513010A (en) * 2013-03-21 2014-10-15 Paradigm Flow Services Ltd Water deluge system testing apparatus and method
GB2513010B (en) * 2013-03-21 2016-03-02 Paradigm Flow Services Ltd Water deluge system testing apparatus and method
US10451457B2 (en) 2013-03-21 2019-10-22 Paradigm Flow Services Limited Water deluge system testing apparatus and method
CN108763809A (zh) * 2018-06-07 2018-11-06 中国石油大学(北京) 一种复杂输油管道系统在泄漏事故时的停输方法
CN108763809B (zh) * 2018-06-07 2020-08-25 中国石油大学(北京) 一种复杂输油管道系统在泄漏事故时的停输方法

Also Published As

Publication number Publication date
DE102010050505A1 (de) 2012-05-10
EP2638377A1 (fr) 2013-09-18

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