EP0236638B1 - Temperaturkompensierter Druckregler und Sicherheitseinrichtung für Feuerlöscher mit einem solchen Druckregler. - Google Patents
Temperaturkompensierter Druckregler und Sicherheitseinrichtung für Feuerlöscher mit einem solchen Druckregler. Download PDFInfo
- Publication number
- EP0236638B1 EP0236638B1 EP86400492A EP86400492A EP0236638B1 EP 0236638 B1 EP0236638 B1 EP 0236638B1 EP 86400492 A EP86400492 A EP 86400492A EP 86400492 A EP86400492 A EP 86400492A EP 0236638 B1 EP0236638 B1 EP 0236638B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure regulator
- pressure
- chamber
- fire extinguisher
- pin
- 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.)
- Expired - Lifetime
Links
- 239000000203 mixture Substances 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 239000003380 propellant Substances 0.000 claims description 2
- 238000011067 equilibration Methods 0.000 claims 4
- 238000006073 displacement reaction Methods 0.000 claims 2
- 230000007257 malfunction Effects 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 230000008033 biological extinction Effects 0.000 claims 1
- 238000005192 partition Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920004449 Halon® Polymers 0.000 description 2
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
- A62C3/08—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles in aircraft
Definitions
- the present invention relates to a temperature compensated pressure switch and a fire extinguisher with operating safety. It also relates to a method for filling a pressure switch according to the invention. It finds application in the aeronautical field of fire fighting in fast discharge extinguishing devices.
- the invention overcomes this drawback.
- the end of the mobile of the pressure switch which is opposite to the end actuating the electrical device is subjected to the action of the pressure prevailing in a chamber for balancing the pressure of the pressure of the external atmosphere of the pressure switch , and in that the balancing chamber is arranged inside the chamber filled with the reference mixture.
- the casing 2 of the fire extinguisher has a hole through which a housing 3 is passed.
- the housing 3 comprises a chamber 4 filled with a gas mixture whose thermodynamic behavior in pressure and temperature is similar to that contained in the fire extinguisher itself.
- the gas mixture in chamber 4 must therefore have a pressure-temperature characteristic identical to that of the gases contained in the extinguisher.
- the two curves can be identical or obtained by a simple constant translation.
- the mixture of the chamber 4 is that contained in the extinguisher.
- a special feature of the chamber 4 is that it is perfectly sealed. Leaks in a fire extinguisher are often caused by the manufacturing technique. Indeed, high pressure fire extinguishers often have seals by a flat seal. Very small leaks at this level can lead to pressure differences of around ten percent in five years, which are incompatible with safety standards. Chamber 4 is constructed so as to avoid these leaks.
- the chamber 4 is a part of the housing 3.
- the latter comprises a volume 5 which communicates through orifices 6, 7 with the interior of the extinguisher.
- the volume 5 is adjacent to the chamber 4.
- the chamber 4 has a wall 21, 24 adjacent to the volume 5 and therefore supports on one side a pressure P1 in the chamber 4 and on the other a pressure P2 in the volume 5 and so in fire extinguisher 1.
- the wall 21, 24 has two parts, one of which 24 is fixed relative to the volume 5, and the other mobile 21.
- the mobile part 21 is connected to the fixed part 24 by a bellows 22 for example hydroformed stainless steel of the Calorstat type which serves both as a seal and as a calibration spring.
- the shaft 30 is made in one piece with the movable wall 21 so as to avoid sealing problems. He also wears a finger 9 mounted at the end of the shaft 30 on a stop 11. The finger 9 passes through an orifice in a third compartment 31 of the housing 3. This compartment 31 contains a microswitch 8 which is actuated only for a stroke of the finger 9 corresponding to a critical pressure difference.
- the microswitch 8 it is necessary for the microswitch 8 to work in an environment close to that of the free atmosphere, that is to say of the atmosphere external to the extinguisher.
- a sealing means must be provided between these two compartments.
- a stainless steel bellows 17 has been placed which provides a chamber 25 in communication with the third compartment 31, the chamber 25 surrounding the shaft 30 and protecting it from the contents of the fire extinguisher 1.
- the shaft 30 transmits the position of the plate 21. This position results from the balance of forces between the pressures applied to the effective sections of the bellows 17, 22, 23 and the stiffness of these same bellows.
- the bellows 17 and 23 are subjected to the same internal pressure (pressure in the chamber 31) through the passage sections 12 and 13.
- the bellows 17 is rigidly connected to the part 18.
- the bellows 23 is rigidly connected to the part 32
- the parts 18 and 32 are rigidly linked together.
- the cross sections of the bellows 17 and 23 having the same value, the pressure fluctuations in the chamber 31 do not influence the position of the plate 21.
- the shaft 30 rises until triggering the swich 8.
- a second microswitch is placed for example on the stop 32 to detect the descent of the shaft 30 when the bellows 23 leaks.
- the safety device is fixed and a flat seal 20 is arranged so as to ensure the seal.
- the interface 19 is constituted by a thread in order to make the safety device removable. The orifice is closed during the test by a corresponding threaded plug.
- the filling of the chamber 4 is ensured by a tube 15.
- the fillings of the extinguisher 1 and of the chamber 4 ensure there the same thermodynamic mixtures (same temperature pressure variations).
- the tube is welded at 16.
- the characteristic of the invention which makes the filling pressure of the enclosure to be checked equal to that of the pressure switch avoids the risks of leakage on closing 16.
- the filling of the pressure switch can be carried out as follows: a filling tank is first charged from the primary vacuum to a given mass of mixture which is defined to obtain at the end of filling the mixing ratio and the desired thermodynamic conditions. At least one pressure switch is put on primary vacuum and connected to an access valve (initially closed) to the filling tank. The assembly is placed in a climatic chamber brought to a higher temperature equal to the critical temperature of the mixture. We then wait for the thermo-mechanical balance of the mixture and then open the tank access valve so as to fill the thermostats.
- thermodynamic equilibrium is awaited, then the access valve is closed and the filling tube 15 of each pressure switch is closed, which returns to ambient temperature.
- the cycle is determined so that the molar composition and the pressure in the pressure switch at the end of filling correspond to the desired values.
- the invention applies to the monitoring of pressurized gas storage capacities both for on-board installations on air, space or land vehicles, as well as for fixed installations such as refinery storage tanks.
- the invention applies to the inflation bottles of the inflatable lifeboats on board the devices.
- the pressure switch is formed around a Bourdon tube immersed in the capacity to be monitored, the capacity of which is filled with the reference mixture.
- the tube is of calibrated stiffness and movable so as to drive an actuating lever of a microcontact analogous to the contact (8) so as to generate the alarm signal warning the central security that the controlled enclosure undergoes a drop in pressure due to leakage.
- This pressure drop is not due to a variation in the outside atmosphere since the pressure switch is said to be temperature compensated.
- the pressure switch always includes a balancing chamber intended to balance, that is to say cancel, the pressure variations of the external atmosphere of the pressure switch.
- the pressure drop information is transmitted to a micro-contact inside the capacity to be monitored, which is subject to external pressure conditions.
- the installation of a balancing system based on the principle of that of the figure removes the influence of external pressure on the system.
- the microswitch 8 is replaced by an electrical device which provides a functional signal of the position of the mobile 30, that is to say of the pressures acting on the parts of the pressure switch linked to the mobile 30.
- the derived signal is calibrated and continuously supplies the value of the controlled differential pressure.
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Measuring Fluid Pressure (AREA)
Claims (15)
- Temperaturkompensierter Druckregler mit einer dichten Kammer (4), die mit einer Bezugsmischung gefüllt ist und eine mechanische Verformung abhängig von der Differenz zwischen dem Druck der Bezugsmischung und den in einem zu regelnden Raum (1) herrschenden Druck erfährt, wobei diese Verformung an ein bewegliches Organ (30) übertragen wird, das eine elektrische Vorrichtung (8) betätigt, die ein von der Verschiebung des beweglichen Organs (30) abhängiges Signal liefern soll, dadurch gekennzeichnet, daß das Ende des beweglichen Organs (30), das dem mit der elektrischen Vorrichtung (8) zusammenwirkenden Ende gegenüberliegt, der Wirkung des in einer zweiten Kammer (14) herrschenden Drucks ausgesetzt ist, in der der Druck der Außenatmosphäre herrscht, und daß diese Ausgleichskammer (14) im Inneren der dichten Kammer (4) angeordnet ist, die mit der Bezugsmischung gefüllt ist.
- Druckregler nach Anspruch 1, dadurch gekennzeichnet, daß die mit der Bezugsmischung gefüllte dichte Kammer (4) durch eine zumindest in Richtung der Verschiebung des beweglichen Organs (30) verformbare Wand (22) begrenzt ist, die mit dem Druck in dem zu regelnden Raum (1) in Berührung steht.
- Druckregler nach Anspruch 2, dadurch gekennzeichnet, daß die verformbare Wand aus einer Bourdon-Röhre besteht, deren freies Ende an das beweglieche Organ (30) angeschlossen ist.
- Druckregler nach Anspruch 2, dadurch gekennzeichnet, daß die verformbare Wand aus einem an das bewegliche Organ (30) angeschlossenen Balg (22) besteht.
- Druckregler nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine elektrische Vorrichtung eine Stellung des beweglichen Organs (30) entsprechend einen Fehlverhalten des Druckreglers erkennt, wenn sich ein Leck zwischen der Bezugskammer (4) und der Ausgleichskammer (14) ausbildet.
- Feuerlöscher der ein Treibmittel und ein gasförmiges Löschmittel enthält, dadurch gekennzeichnet, daß er einen temperaturkompensierten Druckregler nach einem beliebigen der vorhergehenden Ansprüche enthält.
- Feuerlöscher nach Anspruch 6, dadurch gekennzeichnet, daß die dichte Kammer (4) des Druckreglers mit derselben Mischung aus gasförmigem Treibmittel und gasförmigem Löschmittel wie der Feuerlöscher (1) gefüllt ist.
- Feuerlöscher nach Anspruch 7, dadurch gekennzeichnet, daß der Druck in der Kammer (4) des Druckreglers dem Druck im Feuerlöscher (1) gleicht.
- Feuerlöscher nach Anspruch 6, dadurch gekennzeichnet, daß das bewegliche Organ (30) des Druckreglers einen Stößel (30) mit einem Finger (9) an der Spitze aufweist, der mit der elektrischen Vorrichtung (8) und einem Anschlag (11) zur Hubbegrenzung des Stößels zusammenwirkt.
- Feuerlöscher nach Anspruch 6, dadurch gekennzeichnet, daß der Druckregler ein Gehäuse (3) mit einem mit der Bezugsmischung gefüllten und die dichte Kammer (4) bildenden ersten Abteil, einem dem im Inneren des Feuerlöschers herrschenden Druck ausgesetzten zweiten Abteil (5) und einem dritten Abteil (31) aufweist, das die elektrische Vorrichtung (8) enthält.
- Feuerlöscher nach den Ansprüchen 9 und 10, dadurch gekennzeichnet daß der Stößel (30) des Druckreglers durch eine Öffnung die Trennwand zwischen dem zweiten und dem dritten Abteil (5, 31) des Druckreglers durchdringt.
- Feuerlöscher nach Anspruch 11, dadurch gekennzeichnet, daß die Abdichtung zwischen dem zweiten Abteil (5) und dem dritten Abteil (31) im Druckregler durch einen Balg (17) bewirkt wird, der einerseits an der Öffnung für den Durchtritt des Stößels (30) und andererseits an diesem Stößel (30) befestigt ist.
- Feuerlöscher nach Anspruch 12, dadurch gekennzeichnet, daß der Stößel (30) des Druckreglers in Richtung auf das erste Abteil (4) bis in eine Kammer (14) verlängert ist, die durch einen Balg (23) begrenzt wird, wobei dieser Balg einerseits an der Verlängerung des Stößels (30) und andererseits an einer festen Wand (32) befestigt ist, die den Boden des ersten Abteils (4) bildet, und daß ein Kanal (12, 13) die durch den an der Stößeldurchtrittsöffnung befestigten Balg (17) begrenzte Kammer (25) mit der Außenatmosphäre-Ausgleichskammer (14) in Verbindung bringt, die von den auf der Verlängerung des Stößels (30) sitzenden Balg (23) begrenzt wird.
- Feuerlöscher nach Anspruch 13, dadurch gekennzeichnet, daß der Druckregler einen elektrischen Kontakt aufweist, der ein Alarmsignal bei einem unkorrekten Betrieb des Druckreglers liefern soll und so angeordnet ist, daß er eine Bewegung des Stößels (30) in Richtung auf den Boden der Außenatmosphäre-Ausgleichskammer (14) des Druckreglers erfaßt.
- Feuerlöscher nach Anspruch 10, dadurch gekennzeichnet, daß im Übergang zwischen dem Gehäuse (3) des Druckreglers und der Wand (2) des Feuerlöschers ein Gewinde (1) ausgebildet ist.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8416438A FR2572292B3 (fr) | 1984-10-26 | 1984-10-26 | Extincteur a securite de fonctionnement |
DE8686400492T DE3679179D1 (de) | 1986-03-07 | 1986-03-07 | Temperaturkompensierter druckregler und sicherheitseinrichtung fuer feuerloescher mit einem solchen druckregler. |
EP86400492A EP0236638B1 (de) | 1986-03-07 | 1986-03-07 | Temperaturkompensierter Druckregler und Sicherheitseinrichtung für Feuerlöscher mit einem solchen Druckregler. |
CA000506349A CA1256961A (fr) | 1986-03-07 | 1986-04-10 | Pressostat compense en temperature extincteur a securite de fonctionement equipe d'un tel pressostat et procede de remplissage d'un tel pressostat |
US06/853,922 US4697643A (en) | 1986-03-07 | 1986-04-21 | Temperature-compensated pressure controller, operationally reliable extinguisher provided with such a pressure controller and process for filling such a pressure controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP86400492A EP0236638B1 (de) | 1986-03-07 | 1986-03-07 | Temperaturkompensierter Druckregler und Sicherheitseinrichtung für Feuerlöscher mit einem solchen Druckregler. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0236638A1 EP0236638A1 (de) | 1987-09-16 |
EP0236638B1 true EP0236638B1 (de) | 1991-05-08 |
Family
ID=8196285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86400492A Expired - Lifetime EP0236638B1 (de) | 1984-10-26 | 1986-03-07 | Temperaturkompensierter Druckregler und Sicherheitseinrichtung für Feuerlöscher mit einem solchen Druckregler. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4697643A (de) |
EP (1) | EP0236638B1 (de) |
CA (1) | CA1256961A (de) |
DE (1) | DE3679179D1 (de) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8626017U1 (de) * | 1986-09-30 | 1986-11-20 | Werner Turck GmbH & Co. KG, 58553 Halver | Näherungsschalter mit einem in einen Druckzylinder einbaubaren Sensorteil zur Erfassung der Kolbenstellung |
US5000047A (en) * | 1988-03-29 | 1991-03-19 | Nippondenso Co., Ltd. | Pressure sensor |
DE3923660A1 (de) * | 1989-07-18 | 1991-01-24 | Leybold Ag | Ein/aus-schalter |
US5027905A (en) * | 1989-07-26 | 1991-07-02 | Cousineau Ronald L | Fire sprinkler control apparatus |
US4928376A (en) * | 1989-07-31 | 1990-05-29 | Motorola Inc. | Method for filling a cavity, such as a sensor cavity, with an incompressible fluid |
US4980675A (en) * | 1990-01-09 | 1990-12-25 | Spectrum Associates | Temperature compensatible pressure monitor and sensor construction |
US5578993A (en) * | 1994-11-28 | 1996-11-26 | Autronics Corporation | Temperature compensated annunciator |
US7271704B2 (en) | 1996-01-23 | 2007-09-18 | Mija Industries, Inc. | Transmission of data to emergency response personnel |
US7174769B2 (en) * | 1996-01-23 | 2007-02-13 | Mija Industries, Inc. | Monitoring contents of fluid containers |
US8210047B2 (en) | 1996-01-23 | 2012-07-03 | En-Gauge, Inc. | Remote fire extinguisher station inspection |
US7450020B2 (en) * | 1996-01-23 | 2008-11-11 | Mija Industries, Inc. | Signaling pressure detection assembly |
US7728715B2 (en) | 1996-01-23 | 2010-06-01 | En-Gauge, Inc. | Remote monitoring |
US7891435B2 (en) * | 1996-01-23 | 2011-02-22 | En-Gauge, Inc. | Remote inspection of emergency equipment stations |
US7188679B2 (en) * | 1996-01-23 | 2007-03-13 | Mija Industries, Inc. | Remote fire extinguisher station inspection |
US7174783B2 (en) * | 1996-01-23 | 2007-02-13 | Mija Industries, Inc. | Remote monitoring of fluid containers |
US5775430A (en) * | 1996-01-23 | 1998-07-07 | Mija Industries, Inc. | Electroluminescent signalling fire extinguisher |
US5741975A (en) * | 1996-07-31 | 1998-04-21 | Motorola, Inc. | Media isolated differential pressure sensor and fluid injection method |
US20060193262A1 (en) * | 2005-02-25 | 2006-08-31 | Mcsheffrey Brendan T | Collecting and managing data at a construction site |
US9609287B2 (en) | 2005-03-02 | 2017-03-28 | En-Gauge, Inc. | Remote monitoring |
ES1062600Y (es) * | 2006-03-31 | 2006-10-01 | Calvo Benigno Garcia | Dispositivo de control de la presion en un extintor |
US8749373B2 (en) | 2008-02-13 | 2014-06-10 | En-Gauge, Inc. | Emergency equipment power sources |
US8981927B2 (en) | 2008-02-13 | 2015-03-17 | En-Gauge, Inc. | Object Tracking with emergency equipment |
US9041534B2 (en) | 2011-01-26 | 2015-05-26 | En-Gauge, Inc. | Fluid container resource management |
WO2014070502A1 (en) | 2012-11-02 | 2014-05-08 | Exxonmobil Chemical Patents Inc. | Supported salan catalysts |
US9463344B2 (en) * | 2014-04-29 | 2016-10-11 | Kidde Technologies, Inc. | Bellows actuated temperature compensated pressure switching apparatus and system |
US20220072353A1 (en) * | 2020-09-10 | 2022-03-10 | Ametek Ameron, Llc | Multi-shot fire metering system |
CN117629539B (zh) * | 2023-11-28 | 2024-08-16 | 建研科诺(北京)环境技术有限公司 | 一种用于测试气体灭火系统防护区气密性的方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1028886B (de) * | 1952-04-22 | 1958-04-24 | Minimax Ag | Vorrichtung zur UEberwachung der Dichtheit von Kohlensaeureflaschen, insbesondere fuer Feuerloeschzwecke, und Schaltung fuer eine von dieser Vorrichtung zu betaetigende Alarmeinrichtung |
FR1557077A (de) * | 1967-12-12 | 1969-02-14 | ||
JPS5031946B1 (de) * | 1970-12-05 | 1975-10-16 | ||
US3735376A (en) * | 1971-03-05 | 1973-05-22 | Htl Industries | Leakage indicator for a fire extinguisher |
US3946175A (en) * | 1973-12-03 | 1976-03-23 | Htl Industries, Inc. | Magnetic pressure indicator for a container |
US4143545A (en) * | 1978-01-03 | 1979-03-13 | Htl Industries, Inc. | Pressure gauge assembly |
US4289207A (en) * | 1979-02-05 | 1981-09-15 | Caterpillar Tractor Co. | Fire extinguishing system |
US4297687A (en) * | 1980-02-22 | 1981-10-27 | Caterpillar Tractor Co. | Leak detection apparatus |
-
1986
- 1986-03-07 EP EP86400492A patent/EP0236638B1/de not_active Expired - Lifetime
- 1986-03-07 DE DE8686400492T patent/DE3679179D1/de not_active Expired - Fee Related
- 1986-04-10 CA CA000506349A patent/CA1256961A/fr not_active Expired
- 1986-04-21 US US06/853,922 patent/US4697643A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0236638A1 (de) | 1987-09-16 |
US4697643A (en) | 1987-10-06 |
DE3679179D1 (de) | 1991-06-13 |
CA1256961A (fr) | 1989-07-04 |
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