EP1307683B1 - Dispositif d'extinction de feu a dioxyde de carbone - Google Patents

Dispositif d'extinction de feu a dioxyde de carbone Download PDF

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Publication number
EP1307683B1
EP1307683B1 EP01969584A EP01969584A EP1307683B1 EP 1307683 B1 EP1307683 B1 EP 1307683B1 EP 01969584 A EP01969584 A EP 01969584A EP 01969584 A EP01969584 A EP 01969584A EP 1307683 B1 EP1307683 B1 EP 1307683B1
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EP
European Patent Office
Prior art keywords
carbon dioxide
valve base
contact
insulating sleeve
screwed
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
Application number
EP01969584A
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German (de)
English (en)
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EP1307683A1 (fr
Inventor
Thomas Andreas
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Luxembourg Patent Co SA
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Luxembourg Patent Co SA
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Publication date
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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C99/00—Subject matter not provided for in other groups of this subclass
    • A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
    • A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
    • A62C99/0027—Carbon dioxide extinguishers
    • 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
    • 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
    • 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
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382—Constructional details of valves, regulators
    • F17C2205/0385—Constructional details of valves, regulators in blocks or units
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/013—Carbone dioxide
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • F17C2223/047—Localisation of the removal point in the liquid with a dip tube
    • 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
    • F17C2250/03—Control means
    • F17C2250/032—Control means using computers
    • 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
    • F17C2250/03—Control means
    • F17C2250/036—Control means using alarms
    • 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
    • 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
    • F17C2250/043—Pressure
    • 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
    • F17C2250/0486—Indicating or measuring characterised by the location
    • F17C2250/0491—Parameters measured at or inside 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8326—Fluid pressure responsive indicator, recorder or alarm

Definitions

  • the present invention relates to a carbon dioxide fire extinguishing device.
  • Pressure controls are for detecting a gas leak from a Carbon dioxide pressure bottle completely unsuitable there, with a usual Ratio of 1: 1.50 (i.e., a fill weight of 0.666 kg of carbon dioxide per Liter of bottle volume), below a temperature of 27 ° C a loss of gas of 10% caused no significant pressure drop in the bottle anymore (at a fill ratio of 1: 1.34, i. a filling weight of 0.746 kg of carbon dioxide per liter of bottle volume, this is the lower temperature limit even about 22 ° C).
  • the pressure in the carbon dioxide pressure bottle strongly dependent on temperature.
  • level gauge with float have, at least at Fire extinguishing devices, not as an alternative to weighing carbon dioxide pressure vessels can enforce.
  • a valve with an integrated level gauge with float as e.g. from the patent US-A-4,580,450 to a carbon dioxide pressure bottle is known in carbon dioxide fire extinguishing systems not usable because the accommodation of the linkage the level gauge in the valve base takes up a lot of space and thereby the inlet hole for the gas in the valve base will be relatively small got to.
  • carbon dioxide pressure bottles for stationary carbon dioxide fire extinguishing devices in only a female thread W 28.8 x 1/14 "according to DIN 477 to have. In this internal thread a valve base must be screwed in, the one inlet hole for the extinguishing agent of at least 12 mm in diameter should allow the carbon dioxide after triggering the fire extinguishing device, With low pressure loss can flow into the valve.
  • WHICH is considered the closest prior art, is for gas bottles with high purity Gases, a gas cylinder valve with a built-in capacitive level gauge as an alternative to a mechanical level measurement with Swimmers known.
  • the capacitive type described in US-A-5,701,932 Level measurement is based on the principle that the liquid phase a gas has a much higher dielectric constant than the gaseous one Phase, so that a sinking of the liquid level in the pressure bottle reflected in a reduction in the capacity of the probe.
  • the liquid phase of the carbon dioxide already from a temperature of 27.2 ° C, the entire bottle volume, so that above this temperature a loss of gas is no longer necessarily a change in the liquid level in the pressure bottle causes.
  • valve with the capacitive level measuring device from US-A-5,701,932 note that it is also fluidic Do not reason for carbon dioxide pressure bottles in fire extinguishers suitable. In fact, in a valve base with a W 28.8 x 1/14 "screw thread the installation of the capacitive probe takes up so much space that there is no room left for an inlet hole of at least 12 mm diameter for the carbon dioxide quenching gas remains. To have enough space for one To win such 12 mm inlet bore in the valve base, one could of course the diameter of the capacitive probe still smaller. However, one would have to stability problems of the probe with in Take a purchase, which is not responsible for a security-related element are.
  • the present invention is therefore based on the object in one Carbon dioxide fire extinguisher the carbon dioxide pressure vessel, both at low as well as high ambient temperatures, without weighing Reliable to control gas losses.
  • This object is achieved according to the invention achieved by a device according to claim 1.
  • a Capacitive measuring device used for a temperature range is calibrated below and above the critical temperature of the carbon dioxide.
  • the present invention is based on the surprising Acknowledgment that a capacitive measuring device not only in a known way and Can measure changes in fluid level in the pressure vessel, but also above the critical temperature of the carbon dioxide, i. if there is no more physical difference between the gaseous and the liquid phase of the carbon dioxide gives a gas loss from the Pressure vessels are assigned a measurable capacity change clearly can.
  • Such a capacitive measuring device preferably comprises: a capacitive Measuring probe which extends over the entire height of the pressure vessel, a measuring module for measuring the capacitance of the capacitive measuring probe, a Microprocessor for processing the measured capacitance measurements, a measured capacitance change a corresponding gas loss assigns, as well as means for generating an alarm message if that of the microprocessor determined gas loss exceeds a predetermined value.
  • the calibration is preferably done electronically, e.g. a temperature sensor and a memory with calibration values for a temperature range used below and above the critical temperature of the carbon dioxide become.
  • the microprocessor accesses the calibration values in a temperature-dependent manner Memory back to a measured capacitance change a corresponding Allocate gas loss. If the calculated gas loss is a exceeds predetermined value, the microprocessor generates an alarm message.
  • Such a device is ideal for controlling the gas content of carbon dioxide pressure cylinders, both at high and at low levels Ambient temperatures. It is therefore particularly suitable for use in Carbon dioxide fire extinguishing devices suitable where the ambient temperature between -20 ° C and + 60 ° C can lie.
  • the present invention has additionally solved the problem that Capacitive probe so cheap by the tight bottleneck in the Introduce carbon dioxide pressure bottle that the outflow resistance of the Extinguishing gas from the pressure bottle is hardly enlarged.
  • the present Invention an outlet valve for a carbon dioxide pressure bottle with a integrated capacitive probe, wherein a first measuring electrode is formed by a riser, which opens into the valve base, and a second measuring electrode is formed by an electrode tube, which surrounds the riser with an intermediate gap over its entire length.
  • exhaust valve finally results in a simple, reliable and cost effective way transportable carbon dioxide fire extinguisher easier and more often to check for gas loss, or elaborate weighing devices for carbon dioxide pressure cylinders in stationary carbon dioxide fire extinguishing devices to avoid.
  • exhaust valve with probe about the same outflow resistance may be like a flow-optimized outlet valve without a measuring probe. This is where the capacitive measuring probe stands, in which the riser pipe an inner measuring electrode is formed, even with large pressure bottles by a excellent stability.
  • an insulating sleeve surrounds the first end of the Riser in the inlet bore of the valve base and it isolated electrically from the conductive valve base.
  • this first end of the riser then with a contact element from the conductive valve socket is electrically isolated, electrically in contact.
  • the outer Electrode tube is electrically connected to the conductive valve base in Contact and is electrically connected via the latter.
  • the first end of the Riser advantageously has an annular end face as a contact surface for the insulated contact element on, allowing to produce a reliable electrical connection between the insulated contact element and the Riser, the latter only in the axial direction of the contact element in the Inlet hole of the valve base must be pressed.
  • An insulated contact element suitable for this first embodiment comprises advantageously a contact ring with approximately the same inner and outer diameter as the annular contact surface of the riser, and a Insulating ring with larger outer diameter than the contact ring.
  • This Insulating ring lies with an end face on a shoulder surface in the inlet bore and has in the other end face a recess into which the Contact ring is fitted.
  • a large area ensures trouble-free contact between riser and contact element, while reliably preventing an electrical short circuit.
  • the valve base advantageously has a connection channel in this first embodiment on, which forms an opening in the aforementioned shoulder surface, at which the insulating ring rests in the inlet bore.
  • the insulating ring then has in turn an annular groove in the end face, which on this shoulder surface rests, with the opening of the channel in the shoulder surface in this Ring groove opens, and a perforation of the insulating ring from the Ring groove extends to the contact ring.
  • an isolated Connecting wire with a first end firmly connected to the contact ring and through the through-hole and the annular groove of the insulating ring in the connection channel introduced. The annular groove prevents this, that the connecting wire is sheared off, if the contact element is twisted in the inlet bore.
  • the second end of the aforesaid lead wire is fixed to one of connected externally accessible connection element, the latter sealed and electrically isolated is inserted into a bore of the valve base.
  • the conductive valve base makes electrical contact with the outer electrode tube ago.
  • the electrical contact between the outer electrode tube and the valve base can then via an annular end face of the outer Electrode tube are produced, which are connected to an annular end face of the Valve socket is pressed.
  • one end of the insulating sleeve preferably protrudes from the bore of the valve base and serves to attach the outer electrode tube.
  • this electrode tube e.g. screwed onto this end of the insulating sleeve, that its annular end face fixed to the annular end face of the valve base is pressed.
  • the insulating sleeve thus fulfills the function of an electrical Isolator between riser and valve base, an insulating Spacer between riser and outer electrode tube and a Fixing and pressing device for the outer electrode tube.
  • the insulating sleeve can continue to be an electrical have conductive outer wall, over which the valve base and the outer Electrode tube are electrically connected together. This will be the electrical contact between valve base and outer electrode tube on improved.
  • the measuring electrode is the riser with screwed its upper end into the inlet bore of the valve base.
  • An upper insulating sleeve is pushed onto the upper end of the riser.
  • a lower mounting sleeve is placed on the lower end of the riser unscrewed, with the screwed mounting sleeve the outer Pressing the electrode tube axially against the upper insulating sleeve.
  • the upper insulation sleeve This is advantageous against an end face of the valve socket pressed.
  • a preferred embodiment of the lower mounting sleeve comprises a metallic Kemlik the screwed onto the lower end of the riser is and an insulator between the metallic core body and the outer electrode tube is arranged.
  • reference numeral 10 denotes a carbon dioxide pressure bottle a carbon dioxide fire extinguisher.
  • This carbon dioxide pressure bottle is e.g. with a filling ratio of 1: 1.50 with carbon dioxide filled, giving a filling weight of 0.666 kg of carbon dioxide per liter of bottle volume equivalent.
  • the pressure bottle 10 is closed 62.8% filled with liquid carbon dioxide.
  • the volume fraction of the liquid phase is 82%.
  • These Device 11 comprises a capacitive measuring probe 12, which consists of two Composed of electrodes. The latter extend over the entire height the pressure bottle 10 and are separated by an intermediate gap, in which the carbon dioxide forms a dielectric. Note that: (1) at Temperatures below 27.2 ° C the dielectric in the upper part of the intermediate gap is formed by gaseous carbon dioxide (at 20 ° C is the Measuring probe 10 e.g.
  • the capacitive measuring probe 12 is connected to a measuring module 14, which measures the capacitance of the capacitive probe 12 and its measured values to a microprocessor 16 passes.
  • a memory module 20 on that the microprocessor 16 has access are calibration values for a temperature range below and above the critical temperature of the carbon dioxide saved.
  • the microprocessor 16 calculates, based on the measured temperature and the calibration value for this temperature, the carbon dioxide content of the pressure bottle 10 and compares this calculated carbon dioxide content with the target content the pressure bottle. If a Gasvertust is determined the one given Exceeds value, the microprocessor 16 generates an alarm message, e.g. is displayed by means of an optical and / or acoustic alarm module 22. In this way, a simple device for detecting a Gas loss created from a carbon dioxide pressure vessel, which is also at high ambient temperatures can be used.
  • Fig. 2 shows an exhaust valve 30 of a stationary carbon dioxide fire extinguishing device in which a capacitive probe 12 is integrated.
  • Top 31 of the outlet valve 30, which includes a triggering device is in Fig. 2 only indicated, since it for the understanding of the present invention is not important.
  • the outlet valve 30 comprises a valve body 31 with a valve base 32 with an external thread 34, with which it is in the bottleneck of a carbon dioxide pressure bottle is screwed in.
  • a carbon dioxide pressure bottle is screwed in.
  • the Carbon dioxide pressure cylinders used in stationary fire extinguishing devices are used in their bottleneck only a W 28.8 x 1/14 "thread according to DIN 477 for screwing in the valve base 32, i. that in the Valve base 32 relatively narrow space prevail.
  • an inlet bore 36 is disposed, in a riser 38 opens axially this riser 38 extends into the proximity of the bottom of the bottle. Note that in a stationary carbon dioxide fire extinguisher the inlet bore 36 in the valve base 32 and the Riser 38 must have at least an inner diameter of 12 mm, to ensure that after triggering the fire extinguishing device, the Quenching gas with sufficiently low pressure loss via the riser 38 in the Outlet valve 30 can flow.
  • the capacitive measuring probe 12 is in the outlet valve 30 of FIG. 2 formed by the riser 38 and by an outer electrode tube 40, which surrounds the riser 38 with an intermediate gap 42.
  • the capacitive probe 12 comprises two coaxial tubular Electrodes, wherein the riser 38, the inner electrode, the electrode tube 40th the outer electrode is formed.
  • the annular intermediate gap 42 between the both electrodes 38 and 40 is liquid, gaseous or supercritical Carbon dioxide, which is a dielectric between the two Forms electrodes 38 and 40.
  • the reference numeral 48 is a ventilation opening at the upper end of the outer electrode tube 40, the ensures that the liquid level and the pressure in the intermediate gap 42 and the pressure bottle always agree.
  • An insulating sleeve 50 is on the upper end of the Riser 38 screwed.
  • This insulating sleeve 50 comprises at its upper End a first external thread 52 with which they into an internal thread 52 'in one Bore of the valve base 32 is screwed in
  • the lower end of the insulating sleeve 50 protrudes from the bore of the valve base 32 and is with a second external thread 54 provided.
  • On this second external thread 54 is screwed the upper end of the outer electrode tube 40 so that it with its end face 56 fixed to a face 58 of the electrically conductive Valve socket 32 is pressed and thus in electrical contact with this stands.
  • the insulating sleeve 50 thus the function an electrical insulator between riser 38 and valve base 32, a insulating spacer between riser 38 and outer electrode tube 40 and a fastening and pressing device for the outer Electrode tube 40 is satisfied.
  • This multifunctional sleeve is a minimum Individual parts for the installation of the two measuring electrodes 38, 40 needed.
  • the insulating sleeve 50 is also an electrically conductive Outside wall may have, over which the valve base 32 and the outer Electrode tube 40 are electrically connected together. This will be the electrical contact between valve base 32 and outer electrode tube 40 even further improved.
  • the reference numeral 60 denotes a contact ring which is approximately the same inner and outer diameter as the end face 62 of the riser 38 has.
  • This contact ring 60 is in a recess in a first End face of an insulating ring 64 fitted.
  • the latter has the same inner diameter, however, a larger outer diameter than the contact ring 60th on and lies with its second end face on a shoulder surface 66 in the Inlet bore 36 on.
  • the reference numeral 70 denotes a connection channel in the valve base 32, in the shoulder surface 66 forms an opening at which the Insulating ring 64 rests in the inlet bore 36.
  • the insulating ring 64 has a Ring groove 72 in the end face which rests against the shoulder surface 66, wherein the Opening of the connection channel 70 opens into this annular groove 72.
  • a puncture 74 of the insulating ring 64 extends from the annular groove 72 to the contact ring 60.
  • An insulated terminal wire 76 is connected to the contact ring at a first end 60 firmly connected and through the through hole 74 and the annular groove 72nd of the insulating ring 64 inserted into the connection channel 70.
  • the annular groove 72 prevents in this case that the connecting wire 76 is sheared off, if the Contact ring 60 is rotated in the inlet bore 36.
  • the connecting wire 76 is firmly connected to a rod-shaped connection element 78.
  • the latter is sealed inserted into a cone-shaped insulating sleeve 80, the in turn by means of a clamping screw 82 in a conical bore 84 in Valve body is pressed sealed.
  • the reference numeral 90 in Fig. 4 is a board with an electronic Shadow shown fitted in a chamber 92 of the valve body is.
  • a screw plug 94 closes the chamber 92 and at the same time fixes the Board 90 in the chamber 92.
  • the board 90th connected to the riser 38, which is known to be the first electrode of the capacitive probe 12 is formed.
  • Above the electrically conductive valve housing the board 90 is connected to the outer electrode tube 40, the As is known, the second electrode of the capacitive measuring probe 12 is formed.
  • One Plug 96 sealed in a socket in screw plug 94th is inserted, it allows the board 90 via a connecting line 98 at external circuits or to connect external power sources.
  • the measuring module 14 On the board 90 are the measuring module 14, the microprocessor 16, the Temperature probe 18 and the memory module 20 housed. Above the Connecting line 98 is an alarm message either to an external alarm module or a central monitoring network forwarded.
  • Reference numeral 110 denotes an upper insulating sleeve which is pushed onto the riser 38 'and an end face 112 on the End face 58 of the valve base 32 abuts.
  • the outer electrode tube 40 ' is pushed with one end to the lower end of the upper insulating sleeve 110 and lies with its upper end face on a shoulder surface 114 of upper insulating sleeve 110 at.
  • On the lower end of the riser 38 ' is a Attachment sleeve 116 screwed.
  • the latter has a cylindrical end 118, which is inserted into the lower end of the outer electrode tube 40 '.
  • an annular Contact surface 120 on the lower end face of the electrode tube 40 'from to the latter axially with its upper end face to the shoulder surface 114 of the to press upper insulating sleeve 110, which in turn with its end face 112 is pressed against the end face 58 of the valve base 32.
  • the lower attachment sleeve 116 advantageously comprises a metallic Kemographer 122, in which the internal thread for screwing onto the riser 38 'is formed, and an insulating sleeve 124, which on the metallic Kemanalysis 122 is placed and an electrical contact between the outer electrode tube 40 and the metallic core body 122 avoids.
  • the metallic core body 122 also be coated with an insulating material.
  • a mounting sleeve can be used which is made entirely of an insulating material.
  • the solution with a metallic core body 122 is characterized by a larger mechanical strength in the event of severe temperature fluctuations therefore preferred.
  • an annular spacer 44 made of an insulating material that of annular intermediate gap 42 between the two tubes over the whole Length remains constant.
  • the reference numeral 130 in Fig. 5 denotes a locking pin in a Bore in the end face 58 of the valve base 32 is screwed and in a Recess of the upper insulating sleeve 110 engages such that it the latter blocked against twisting.
  • a pierced locking pin 132 is advantageous as Used cable entry.
  • an insulated connection cable 134th through a cable channel 136 in the valve base 32 through the pierced Locking pin 132 in an outer recess 138 of the Isotationsmuffe 110th where it is electrically connected to the outer electrode tube 40 ' is.
  • the reference numerals 140, 142 in Fig. 5 denote lateral openings in lower and upper end of the outer electrode tube 40 '. These openings 140, 142 ensure that the intermediate gap 42 in immediate connection standing with the bottle interior.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Claims (17)

  1. Dispositif d'extinction au dioxyde de carbone, comprenant :
    une bouteille de dioxyde de carbone sous pression (10) destinée au stockage de l'agent d'extinction ;
    un dispositif pour déterminer une perte de gaz sur la bouteille de dioxyde de carbone sous pression (10) ;
    caractérisé en ce que
    le dispositif pour déterminer une perte de gaz sur la bouteille de dioxyde de carbone sous pression (10) comprend un dispositif de mesure capacitif (11) qui est calibré pour une gamme de températures située au-dessous et au-dessus de la température critique du dioxyde de carbone.
  2. Dispositif selon la revendication 1, comprenant :
    une sonde de mesure capacitive (12) qui s'étend sur toute la hauteur du réservoir sous pression (10) ;
    un module de mesure (14) pour mesurer la capacité de la sonde de mesure capacitive (12) ;
    un microprocesseur (16) qui associe à une variation mesurée de la capacité une perte de gaz correspondante ; et
    des moyens pour produire un message d'alarme si la perte de gaz déterminée par le microprocesseur dépasse une valeur prédéfinie.
  3. Dispositif selon la revendication 2, comprenant :
    un capteur de température (18) ; et
    un module de mémoire (20) contenant des valeurs étalon pour une gamme de températures située au-dessous et au-dessus de la température critique du dioxyde de carbone, le microprocesseur (16) utilisant ces valeurs étalon en fonction de la température pour associer à une variation mesurée de la capacité une perte de gaz correspondante.
  4. Dispositif selon la revendication 1, 2 ou 3, comprenant :
    une soupape de sortie (30) avec une embase de soupape (32) destinée à être vissée sur une bouteille de dioxyde de carbone sous pression (10), cette embase de soupape (32) comportant un alésage d'entrée (36) ;
    un tube montant (38) qui débouche dans l'alésage d'entrée (36) de l'embase de soupape (32) de sorte que le gaz de dioxyde de carbone,
    après déclenchement du dispositif d'extinction, pénètre à travers le tube montant (38) dans la soupape de sortie (30) ; et
    une sonde de mesure capacitive (12) qui comprend deux électrodes coaxiales, le tube montant (38) formant la première électrode, la deuxième électrode étant formée par un tube d'électrode extérieur (40) lequel entoure le tube montant (38) avec un interstice (42).
  5. Dispositif selon la revendication 4, caractérisé par :
    un manchon isolant (50) qui entoure l'extrémité du tube montant (38) dans l'alésage d'entrée (36) et l'isole électriquement de l'embase de soupape (32) conductrice ;
    un élément de contact (60, 64) dans l'alésage d'entrée (36) de l'embase de soupape (32), qui est isolé électriquement de l'embase de soupape (32) conductrice et qui est en contact électrique avec la première extrémité du tube montant (38) ;
    le tube d'électrode extérieur (40) étant en contact électrique avec l'embase de soupape (32) conductrice.
  6. Dispositif selon la revendication 5, caractérisé en ce que le tube montant (38) comprend une face frontale annulaire (62) comme surface de contact pour l'élément de contact (60, 64) isolé.
  7. Dispositif selon la revendication 6, caractérisé en ce que l'élément de contact (60, 64) isolé comprend les pièces suivantes :
    une bague de contact (60) ayant approximativement le même diamètre intérieur et extérieur que la surface de contact annulaire (62) du tube montant (38) ; et
    une bague isolante (64) ayant un plus grand diamètre extérieur que la bague de contact (60) et reposant avec une face frontale sur une surface d'appui (66) de l'alésage d'entrée (36), et l'autre face frontale comportant un creux dans lequel est enchâssée la bague de contact (60).
  8. Dispositif selon la revendication 7, caractérisé par :
    un canal de raccordement (70) dans l'embase de soupape (32) qui forme une ouverture dans la surface d'appui (66) sur laquelle repose la bague isolante (64) ;
    une rainure annulaire (72) dans la face frontale de la bague isolante (64) qui repose sur cette surface d'appui (66), l'ouverture du canal de raccordement (70) dans la surface d'appui (66) débouchant dans cette rainure annulaire (72) ;
    un perçage (74) de la bague isolante (64), allant de la rainure annulaire (72) à la bague de contact (60) ; et
    un fil de raccordement isolé (76) raccordé fixement par une première extrémité à la bague de contact (60) et inséré à travers le perçage (74) et la rainure annulaire (72) de la bague isolante (64) dans le canal de raccordement (70).
  9. Dispositif selon la revendication 8, caractérisé par un premier élément de raccordement (78) accessible de l'extérieur, qui, rendu étanche et isolé électriquement, est placé dans un alésage de l'embase de soupape (32) et auquel est raccordée fixement la deuxième extrémité du fil de raccordement (76).
  10. Dispositif selon l'une des revendications 5 à 9, caractérisé en ce que le tube d'électrode extérieur (40) comporte une face frontale annulaire (56) qui est serrée contre une face frontale annulaire (58) de l'embase de soupape (32).
  11. Dispositif selon la revendication 10, caractérisé en ce qu'une extrémité du manchon isolant (50) déborde de l'alésage de l'embase de soupape (32) et que le tube d'électrode (40) est vissé sur cette extrémité du manchon isolant (50) de telle manière que sa face frontale annulaire se trouve fermement serrée contre la face frontale annulaire de l'embase de soupape (32).
  12. Dispositif selon l'une des revendications 5 à 11, caractérisé en ce que le manchon isolant (50) est vissé dans l'alésage d'entrée (36).
  13. Dispositif selon la revendication 10, caractérisé :
    en ce qu'une première extrémité du manchon isolant (50) est vissée dans l'alésage d'entrée (36) et que la deuxième extrémité du manchon isolant (50) déborde de l'alésage d'entrée (36) ;
    en ce que le tube d'électrode extérieur (40) est vissé sur la deuxième extrémité du manchon isolant (50) ; et
    en ce que le manchon isolant (50) comporte une paroi extérieure électro-conductrice par l'intermédiaire de laquelle l'embase de soupape (32) et le tube d'électrode extérieur (40) sont connectés électriquement entre eux.
  14. Dispositif selon l'une des revendications 5 à 13, caractérisé en ce que le tube montant (38) est vissé dans le manchon isolant (50).
  15. Dispositif selon la revendication 4, caractérisé en ce que :
    le tube montant (38) est vissé par son extrémité supérieure dans l'alésage d'entrée (36) de l'embase de soupape (32) ;
    un manchon d'isolation supérieur (110) est enfilé sur l'extrémité supérieure du tube montant (38') ;
    un manchon de fixation inférieur (116) est vissé sur l'extrémité inférieure du tube montant (38'), ledit manchon de fixation (116) vissé serrant le tube d'électrode extérieur (40') axialement contre le manchon d'isolation supérieur (110).
  16. Dispositif selon la revendication 15, caractérisé en ce que le manchon d'isolation supérieur (110) est serré contre une face frontale (58) de l'embase de soupape (32).
  17. Dispositif selon la revendication 15 ou 16, caractérisé en ce que le manchon de fixation inférieur (116) comprend :
    un corps central métallique (122) qui est vissé sur l'extrémité inférieure du tube montant (38') ; et
    un isolateur qui est placé entre le corps central métallique (122) et le tube d'électrode extérieur (40').
EP01969584A 2000-08-10 2001-08-10 Dispositif d'extinction de feu a dioxyde de carbone Expired - Lifetime EP1307683B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU90629A LU90629B1 (de) 2000-08-10 2000-08-10 Vorrichtung zum Feststellen eines Gasverlustes auseinem Kohlendioxid-Druckbeh{lter.
LU90629 2000-08-10
PCT/EP2001/009269 WO2002012781A1 (fr) 2000-08-10 2001-08-10 Dispositif d'extinction de feu a dioxyde de carbone

Publications (2)

Publication Number Publication Date
EP1307683A1 EP1307683A1 (fr) 2003-05-07
EP1307683B1 true EP1307683B1 (fr) 2004-05-12

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EP01969584A Expired - Lifetime EP1307683B1 (fr) 2000-08-10 2001-08-10 Dispositif d'extinction de feu a dioxyde de carbone

Country Status (9)

Country Link
US (1) US6836217B2 (fr)
EP (1) EP1307683B1 (fr)
JP (1) JP4751007B2 (fr)
CN (1) CN1230647C (fr)
AU (1) AU2001289797A1 (fr)
DE (1) DE50102278D1 (fr)
LU (1) LU90629B1 (fr)
RU (1) RU2266464C2 (fr)
WO (1) WO2002012781A1 (fr)

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CN112334743A (zh) * 2018-11-30 2021-02-05 开利公司 抑制罐秤和液位确定
CN109621274A (zh) * 2018-12-07 2019-04-16 福州大学 一种基于超临界二氧化碳的隔爆装置及其工作方法
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DE102010004902B4 (de) * 2010-01-19 2011-09-01 Bernd Piontek Vorrichtung zur Entleerung von Flüssigkeiten oder Pulvern aus Behältern

Also Published As

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DE50102278D1 (de) 2004-06-17
CN1230647C (zh) 2005-12-07
EP1307683A1 (fr) 2003-05-07
AU2001289797A1 (en) 2002-02-18
JP2004505699A (ja) 2004-02-26
RU2266464C2 (ru) 2005-12-20
CN1446296A (zh) 2003-10-01
WO2002012781A1 (fr) 2002-02-14
US20040164868A1 (en) 2004-08-26
US6836217B2 (en) 2004-12-28
JP4751007B2 (ja) 2011-08-17
LU90629B1 (de) 2006-02-21

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