WO2001014834A1 - Dispositif de signalisation de proximite d'epuisement et procede de signalisation y relatif - Google Patents

Dispositif de signalisation de proximite d'epuisement et procede de signalisation y relatif Download PDF

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Publication number
WO2001014834A1
WO2001014834A1 PCT/EP2000/008227 EP0008227W WO0114834A1 WO 2001014834 A1 WO2001014834 A1 WO 2001014834A1 EP 0008227 W EP0008227 W EP 0008227W WO 0114834 A1 WO0114834 A1 WO 0114834A1
Authority
WO
WIPO (PCT)
Prior art keywords
control
monitoring system
measuring device
evaluation unit
container
Prior art date
Application number
PCT/EP2000/008227
Other languages
German (de)
English (en)
Inventor
Michael Stoppert
Michael Schacht
Original Assignee
Gwt Global Weighing Technologies Gmbh
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 Gwt Global Weighing Technologies Gmbh filed Critical Gwt Global Weighing Technologies Gmbh
Priority to AU67029/00A priority Critical patent/AU6702900A/en
Publication of WO2001014834A1 publication Critical patent/WO2001014834A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/023—Special adaptations of indicating, measuring, or monitoring equipment having the mass as the parameter
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G17/00—Apparatus for or methods of weighing material of special form or property
    • G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0408—Level of content in the vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/038—Detecting leaked fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/07—Applications for household use
    • F17C2270/0754—Fire extinguishers

Definitions

  • the invention relates to a control and monitoring system for extinguishing agent containers and a method for controlling and monitoring the operating states of an extinguishing agent container with at least one measuring device for determining the fill level of a container, an evaluation unit for the measuring device and a signaling device, the evaluation unit at least when the shrinkage limit is undershot the signaling device is activated.
  • Control and monitoring systems for extinguishing agent containers have so far been used exclusively as loss detection systems. They are used in particular to monitor extinguishing gas containers in a fire protection system. Such quenching gas containers are usually designed as low pressure tanks for C0 2 or other quenching gases. Due to unavoidable leaks in the containers, there is a constant loss of extinguishing gases from the containers.
  • the known shrinkage detection systems are used to monitor this shrinkage in such a way that, if a shrinkage limit is undershot, an alarm is triggered which is to lead to the fact that the shrinkage that has occurred in the meantime is compensated for by supplementary filling of the container.
  • the evaluation unit for the weighing device for shrinkage detection consists in an electromechanical button which is actuated by the weighing device, for example a balance beam, when the weight falls below the value which is predetermined by the shrinkage limit.
  • the actuation of the button leads to activation of the signaling device in a known shrinkage detection system, which generally indicates acoustically that the shrinkage has progressed to such an extent that supplementary filling is necessary.
  • the problem with the known shrinkage detection systems is first of all that the purely mechanical weighing devices can be blocked, in particular via a locking device which is generally present, so that no further shrinkage detection takes place. This is particularly often the case when an acoustic message has been triggered that the shrinkage limit has been undershot, whereupon the acoustic alarm, which is a nuisance to the operating personnel, locks the mechanical weighing device in its rest position, in which no further shrinkage message is output. In these cases, it often happens that the necessary supplementary filling of the container is forgotten. So there is a further shrinkage and, in extreme cases, a complete emptying of the extinguishing gas container.
  • the known shrinkage detection systems require periodic inspections by state testing facilities to ensure their functionality to document the weighing device in the loss detection system and to avoid, for example, that an insurer excludes liability.
  • the present invention is based on the object of providing a control and monitoring system for extinguishing agent containers and methods for controlling and monitoring the operating states of extinguishing agent containers, which have a high level Operational safety guaranteed.
  • the previously derived and indicated object is achieved in that the measuring device has an electromechanically operating sensor element which emits a sensor signal proportional to the fill level.
  • the sensor element is designed as an electromechanical weighing cell.
  • Elements for force absorption are referred to as electromechanical load cells, which convert the mechanical deformation of a generally metallic body into an electrical signal via strain gauges attached to this body and form a weighing device in cooperation with an electrical control.
  • load cells are known for a wide variety of nominal loads and achieve accuracy classes of up to 0.015% - for monitoring the shrinkage limit an accuracy of the level display of approx. 1% based on the total fill volume is advisable.
  • the electromechanical load cell is designed as a pressure load cell.
  • the pressure truck cell has the advantage over the train truck cell that it is easier to attach in connection with a container for, for example, extinguishing gas.
  • the use of a pressure load cell is to be preferred, since bending load cells are generally not suitable for use in connection with high nominal loads, as they usually occur with gas scrubbers, and, moreover, bending load cells generally meet lower accuracy requirements.
  • the electromechanical load cell is arranged in a single support of the container.
  • the fact that a single electromechanical weighing cell is used means that the outlay can be reduced and, at the same time, taking into account the geometry of the container, it is possible to ensure sufficient measuring accuracy for the shrinkage.
  • the use of a single weighing cell is possible in particular because the extinguishing gases are stored at least predominantly in liquid form by the container are so that - assuming a symmetrical container shape - there is no shift in the center of gravity when the liquid level drops.
  • the measuring device has a volumetric sensor system as an alternative or cumulatively to the use of a weighing cell
  • an alternative measuring method can be used, which can be used, among other things, to verify the sensor signals of the weighing cell.
  • the reporting device has at least one optical signal transmitter and one acoustic signal transmitter.
  • the acoustic personnel can detect an acoustic signal or an optical signal. This ensures an optimal detectability of falling below the shrinkage limit.
  • control and monitoring system for extinguishing agent containers can be integrated, for example, in control systems.
  • control systems can also be used, for example, for remote maintenance of the control and monitoring system for extinguishing agent containers.
  • control and monitoring system experiences a further embodiment in that further electromechanical sensors for Monitoring of critical operating conditions, such as overpressure, underpressure, incorrect operating temperature and unit failure, are provided.
  • critical operating conditions such as overpressure, underpressure, incorrect operating temperature and unit failure
  • the present invention relates to a method for controlling and monitoring the operating states of extinguishing agent containers with the aid of at least one measuring device, an evaluation unit for the measuring device and a signaling device, in which the level of a container is determined by the measuring device and, when the shrinkage limit is undershot, the Signaling device is activated by the evaluation unit.
  • a method for controlling and monitoring the operating states of extinguishing agent containers with the aid of at least one measuring device, an evaluation unit for the measuring device and a signaling device, in which the level of a container is determined by the measuring device and, when the shrinkage limit is undershot, the Signaling device is activated by the evaluation unit.
  • the object outlined above for a method for reporting shrinkage is achieved in that the fill level of the container is determined by the measuring device via an electromechanical sensor element emitting a sensor signal proportional to the fill level.
  • the embodiment of the method according to the invention is characterized in that at least one optical and one acoustic warning signal when the shrinkage limit is undershot issued by the signaling device leads to the advantages already described in connection with the control and monitoring system according to the invention for extinguishing agent containers.
  • the operating personnel Because at least the acoustic warning signal is reset, it is possible for the operating personnel to limit the acoustic warning signal to a period immediately after the drop below the shrinkage limit has occurred.
  • the permanent output of the acoustic warning signal between falling below the shrinkage limit and filling the tank is generally not reasonable for the operating personnel.
  • a further advantageous embodiment of the method according to the invention consists in that the evaluation unit delivers an output signal to an electronic reporting system when the shrinkage limit is undershot.
  • the evaluation unit delivers an output signal to an electronic reporting system when the shrinkage limit is undershot.
  • an electromechanical load cell and / or a volumetric sensor system provides not only information about the exceeding or falling below a limit value but also quantitative information about the fill level of the container without additional effort can be used, among other things, to ensure that when exceeded an overfill limit, the signaling device is activated by the evaluation unit.
  • the electromechanical determination according to the invention is used to monitor not only the shrinkage limit but also the overfill limit of a container.
  • the availability of quantitative information can also be used in that the sensor signal proportional to the fill level is used to control the mixing and metering of the extinguishing agents. This opens up new possibilities for using the known extinguishing agent containers. Dosing by area is also possible in the application.
  • Fig. 2 shows the arrangement of an electromechanical load cell in the embodiment of a control and monitoring system for extinguishing agent containers according to the invention.
  • the exemplary embodiment of a control and monitoring system for extinguishing agent containers shown in FIG. 1 has a weighing device 1 for determining the weight of a container 2, an evaluation unit 3 and a signaling device 4.
  • the weighing device 1 - only indicated in FIG. 1 - is designed as an electromechanical load cell.
  • the evaluation unit 3 activates the reporting device 4 when the weight of the container 2 falls below a loss limit.
  • the evaluation unit 3 consists of evaluation electronics 5 and an operating unit 6. Furthermore, the signaling device 4 of the exemplary embodiment shown has an optical signal transmitter 7 and an acoustic signal transmitter 8.
  • the evaluation unit 5 activates the signaling device 4 via a switching unit 11, which activates the operating personnel via the optical signal transmitter 7 and the acoustic signal transmitter 8 indicates that the shrinkage limit has been undershot.
  • a switching unit 11 which activates the operating personnel via the optical signal transmitter 7 and the acoustic signal transmitter 8 indicates that the shrinkage limit has been undershot.
  • the signaling device 4 is deactivated as a whole via a button 10 in the exemplary embodiment shown.
  • the button 12 is used to check the function of the signaling device 4, regardless of whether the shrinkage limit is undershot.
  • the weight of the container 2 is preferably displayed via a display element (not shown) in the evaluation unit 5.
  • a lamp 13 on the control panel 6 is used to control the alarm state directly on the evaluation unit 3.
  • connection of the exemplary embodiment to an electronic reporting system is not shown in FIG. 1. This connection can take place, for example, via a simple switch contact or via a fieldbus system.
  • a pressure truck cell 14 is arranged in a single support of the container 2.
  • the container 2 is located on two fixed bearings 15.
  • the usual requirements for the precision of the determination of falling below the shrinkage limit are, however, usually already met by the arrangement proposed for the exemplary embodiment shown.
  • those with a electromechanical load cell possible quantitative determination of the weight of the container 2 can also be carried out for further monitoring of the shrinkage with regard to, for example, excessive shrinkage speeds.
  • the weight G of the container 2 results from the bearing force (A) measured by the pressure truck cell 14, provided that the container 2 is geometrically symmetrical about its center of gravity, using the formula
  • the exemplary embodiment shown in the figures of a control and monitoring system for extinguishing agent containers according to the invention easily meets the accuracy requirements for the shrinkage notification.
  • a permissible shrinkage of 10% a resolution of 1000 parts of the wagon area is sufficient.
  • a carriage area of 5000 kg a resolution of 5 kg is sufficient.
  • the shrinkage limit in this case is 4500 kg and can be measured with an accuracy of ⁇ 2.5 kg.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne un système de commande et de réglage pour réservoirs de produits extincteurs, éventuellement un procédé de commande et de réglage de l'état de fonctionnement desdits réservoirs, comprenant au moins un dispositif de mesure (1) pour la détermination du niveau dans un réservoir (2), une unité d'évaluation (3) pour le dispositif de mesure (1) et un dispositif de signalisation (4), système dans lequel l'unité d'évaluation (3) active le dispositif de signalisation (4) au moins lorsqu'on est en dessous d'un seuil d'épuisement. L'invention vise à améliorer de façon déterminante sur le plan sécurité, d'une part un tel système de commande et de réglage pour des réservoirs de produits extincteurs et, d'autre part, un tel procédé de commande et de réglage de l'état de fonctionnement desdits réservoirs. A cet effet, l'invention est caractérisée en ce que le dispositif de mesure (1) présente un organe détecteur à fonctionnement électromécanique, émettant un signal détecteur proportionnel au niveau.
PCT/EP2000/008227 1999-08-23 2000-08-23 Dispositif de signalisation de proximite d'epuisement et procede de signalisation y relatif WO2001014834A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU67029/00A AU6702900A (en) 1999-08-23 2000-08-23 Leakage notification system and method for indicating a leakage

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19939907 1999-08-23
DE19939907.7 1999-08-23
EP9906443 1999-09-02
EPPCT/EP99/06443 1999-09-02

Publications (1)

Publication Number Publication Date
WO2001014834A1 true WO2001014834A1 (fr) 2001-03-01

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ID=26054699

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/008227 WO2001014834A1 (fr) 1999-08-23 2000-08-23 Dispositif de signalisation de proximite d'epuisement et procede de signalisation y relatif

Country Status (1)

Country Link
WO (1) WO2001014834A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7652155B2 (en) 2003-04-14 2010-01-26 Nippon Soda Co., Ltd. Diamine derivative, production process therefor and antioxidant
US20210381876A1 (en) * 2018-10-24 2021-12-09 Nano Like Device for storing at least one bulk material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125899A1 (de) * 1981-07-01 1983-01-20 Alfa-Laval Agrar Gmbh, 2056 Glinde Verfahren und vorrichtung zum messen von milchmengen
US5293896A (en) * 1989-12-11 1994-03-15 Balzers Aktiengesellschaft Arrangement for measuring the level of liquified gases
GB2287794A (en) * 1994-03-15 1995-09-27 Requena Jose Luis Jerez Gas container weighing and leak detection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125899A1 (de) * 1981-07-01 1983-01-20 Alfa-Laval Agrar Gmbh, 2056 Glinde Verfahren und vorrichtung zum messen von milchmengen
US5293896A (en) * 1989-12-11 1994-03-15 Balzers Aktiengesellschaft Arrangement for measuring the level of liquified gases
GB2287794A (en) * 1994-03-15 1995-09-27 Requena Jose Luis Jerez Gas container weighing and leak detection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7652155B2 (en) 2003-04-14 2010-01-26 Nippon Soda Co., Ltd. Diamine derivative, production process therefor and antioxidant
US20210381876A1 (en) * 2018-10-24 2021-12-09 Nano Like Device for storing at least one bulk material

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