EP0011682A1 - Diaphragm for a breath-controlled dosing valve - Google Patents

Diaphragm for a breath-controlled dosing valve Download PDF

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Publication number
EP0011682A1
EP0011682A1 EP19790102997 EP79102997A EP0011682A1 EP 0011682 A1 EP0011682 A1 EP 0011682A1 EP 19790102997 EP19790102997 EP 19790102997 EP 79102997 A EP79102997 A EP 79102997A EP 0011682 A1 EP0011682 A1 EP 0011682A1
Authority
EP
European Patent Office
Prior art keywords
membrane
breath
breathing
insert
gas
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.)
Withdrawn
Application number
EP19790102997
Other languages
German (de)
French (fr)
Inventor
Joachim Ing. Grad. Schlobohm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Publication of EP0011682A1 publication Critical patent/EP0011682A1/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/02—Valves
    • A62B9/022—Breathing demand regulators
    • A62B9/025—Breathing demand regulators with tilting opening action
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S137/00—Fluid handling
    • Y10S137/908—Respirator control
    • 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
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface

Definitions

  • the invention relates to a membrane for breath-controlled metering valve according to the preamble of claim 1.
  • Breath controlled dosing valves are used in respiratory protection and respirators.
  • the respiratory protective devices protect the wearer from harmful admixtures and lack of oxygen in the air to be inhaled, the respirators serve to support or create replacements in the event of failed or reduced breathing.
  • An essential component is a membrane that converts pressure changes into control movements. It is acted upon on one side by the possibly aggressively polluted ambient atmosphere and on the inside by the breathing gas to be controlled. It must perform its function within the possible temperature limits -70 ° C to + 80 ° C. There is taken into account that the expansion of the breathing gas from the storage container, for example the pressure bottle, leads to a greater cooling than it corresponds to the ambient temperature.
  • a known compressed gas breathing apparatus which is used in particular for gas protection and diving purposes, is equipped with a lung-controlled air supply.
  • a pressure-sensitive control element with a membrane is connected to the breathing gas line, which automatically opens or closes the compressed gas supply valve at a certain pressure.
  • the membrane closes a housing through which the compressed gas flow to be inhaled is supplied.
  • a lever is articulated in the middle of the membrane and is mounted in a bearing inside the housing. against this lever, another lever is supported, with which the closure valve is operated to the compressed gas supply. To protect the membrane from the environment, it is covered with a cover. Bores in the lid create the pressure connections to the surrounding atmosphere.
  • the membrane With the pressure difference between the environment and the pressure in the breathing tube, the membrane moves and thus controls the closure valve via the levers.
  • the membrane is exposed on one side to the possibly aggressively contaminated outside atmosphere and on the other side to the pressurized gas. Material specifications for the membrane are not made. According to the representation in the drawing, however, it is a single-layer version. It will not withstand the aggressiveness of the surrounding atmosphere for long. In addition, the gas impermeability should not be sufficient.
  • the stored breathing gas supply is unnecessarily burdened. (DE-PS 959 620).
  • the object of the invention is an elastic membrane for breath-controlled metering valves for use in breathing apparatus and respirators, which has a high resistance to the aggressive constituents in the ambient medium at temperatures in a range between -70 ° C and + 80 ° C and gas-impermeable with good Is flexibility.
  • the advantages achieved by the invention are, in particular, that the combination of the materials used for the membrane in the range of the temperature limits -70 ° C. and + 80 ° C. guarantees good gas tightness with sufficient elasticity and thus mobility. With the choice of material for the insert, further adaptation to special tasks is possible.
  • the breath-controlled metering valve 1 is connected to the connecting piece 2 in a known manner to the breathing gas supply, for. B. connected a pressure reducer in front of a compressed gas bottle.
  • the housing 3 is on the connector 4 to the breathing tube connected.
  • the housing 3 is closed by the membrane 5. This is acted upon on the side facing the housing interior 12 by the pressure of the breathing circuit and on the other side 13 by the pressure in the ambient medium.
  • the membrane 5 actuates the valve closure member 7 of the metering valve 1 via the control lever 6.
  • the cover 8 with holes 9 protects the membrane 5.
  • the membrane consists of the insert 10 made of a fabric that is coated on both sides.
  • the inner layer 14 of the membrane facing the housing interior 12, i.e. the breathing gas, is made of a polypropylene oxide rubber, e.g. made of Parel elastomer. This material is extremely gas-tight and remains flexible even at the required low temperatures of -70 ° C.
  • the outer layer 15, which is exposed to the possibly aggressive surrounding medium, is a silicone elastomer. With the silicone elastomer, the high chemical resistance to the surrounding gases or liquids known for this material is achieved.

Abstract

In Atemschutz- und Beatmungsgeräten wird das Dosierventil für das Atemgas atemgesteuert. Das wesentliche Steuerelement ist die auf der einen Seite vom Atemgas und der anderen Seite vom Umgebungsmedium beaufschlagte Membran. Sie muß im gesamten möglichen Temperatur-Bereich von +80°C bis -70°C flexibel und gasundurchlässig sein. Die Membran (5) laut Fig 1 mit der Darstellung des Dosierventils besteht, wie Fig. 2 zeigt, aus einer beidseitig beschichteten Einlage (10) deren dem Umgebungsmedium zugewandte Außenschicht (15) aus einem Silicon-Elastomer und die dem Gehäuseinnern (12), also dem Atemgas, zugewandte Innenschicht (14) aus einem Polypropylenoxid-Kautschuk besteht.The breathing gas metering valve is breath-controlled in breathing apparatus and respirators. The essential control element is the membrane which is acted upon on one side by the breathing gas and on the other side by the surrounding medium. It must be flexible and gas-impermeable in the entire possible temperature range from + 80 ° C to -70 ° C. The membrane (5) according to FIG. 1 with the representation of the metering valve, as shown in FIG. 2, consists of an insert (10) coated on both sides, the outer layer (15) of a silicone elastomer facing the ambient medium and the inside of the housing (12), So the breathing gas facing inner layer (14) consists of a polypropylene oxide rubber.

Description

Die Erfindung betrifft eine Membran für atemgesteuertes Dosierventil entsprechend dem Gattungsbegriff des Anspruches 1.The invention relates to a membrane for breath-controlled metering valve according to the preamble of claim 1.

Atemgesteuerte Dosierventile finden Verwendung in Atemschutz- und Beatmungsgeräten. Die Atemschutzgeräte schützen den Träger vor schädlichen Beimengungen und Sauerstoffmangel in der einzuatmenden Luft, die Beatmungsgeräte dienen zur Unterstützung oder schaffen Ersatz bei ausgefallener oder herabgesetzter Atmung. Ein wesentliches Bauelement ist dabei eine Membran, die Druckänderungen in Steuerungsbewegungen umsetzt. Sie wird dabei auf der einen Seite von der möglicherweise aggressiv verschmutzten Umgebungsatmosphäre und auf der Innenseite von dem zu steuernden Atemgas beaufschlagt. Sie muß ihre Funktion innerhalb der möglicherweise auftretenden Temperaturgrenzen -70°C bis +80°C erfüllen. Dabei ist berücksichtigt, daß die Expansion des Atemgases aus dem Vorratsbehälter, z.B. der Druckflasche, zu einer stärkeren Abkühlung führt, als sie der Umgebungstemperatur entspricht.Breath controlled dosing valves are used in respiratory protection and respirators. The respiratory protective devices protect the wearer from harmful admixtures and lack of oxygen in the air to be inhaled, the respirators serve to support or create replacements in the event of failed or reduced breathing. An essential component is a membrane that converts pressure changes into control movements. It is acted upon on one side by the possibly aggressively polluted ambient atmosphere and on the inside by the breathing gas to be controlled. It must perform its function within the possible temperature limits -70 ° C to + 80 ° C. There is taken into account that the expansion of the breathing gas from the storage container, for example the pressure bottle, leads to a greater cooling than it corresponds to the ambient temperature.

Ein bekanntes Preßgasatemschutzgerät, das insbesondere für Gasschutz- und Taucherzwecke verwendet wird, ist mit einer lungengesteuerten Luftzufuhr ausgerüstet. Bei diesem Gerät ist an die Atemgasleitung ein druckempfindliches Steuerorgan mit einer Membran angeschlossen, die bei einem bestimmten Druck das Preßgaszuführungsventil selbsttätig öffnet bzw. schließt. Die Membran schließt dabei ein Gehäuse ab, durch das der einzuatmende Preßgasstrom zugeführt ist. In der Mitte der Membran ist ein Hebel angelenkt, der in einem Lager im Innern des Gehäuses gelagert ist. Gegen diesen Hebel stützt sich ein weiterer Hebel ab, mit dem das Verschlußventil zum Preßgasvorrat betätigt wird. Zum Schutz der Membran gegenüber der Umgebung ist sie mit einem Deckel abgedeckt. Bohrungen in dem Deckel stellen die Druckverbindungen zur umgebenden Atmosphäre her. Mit der Druckdifferenz Umgebung zum Druck im Atemschlauch bewegt sich die Membran und steuert damit über die Hebel das Verschlußventil. Die Membran ist dabei auf der einen Seite der möglicherweise aggressiv verschmutzten Außenatmosphäre und auf der anderen Seite dem Preßgas ausgesetzt. Materialangaben für die Membran werden nicht gemacht. Nach der Darstellung in der Zeichnung handelt es sich aber um eine einschichtige Ausführung. Sie wird der Aggressivität der Umgebungsatmosphäre nicht lange standhalten. Außerdem dürfte die Gasundurchlässigkeit nicht ausreichend sein. Der mitgeführte Atemgasvorrat wird damit unnötig belastet. (DE-PS 959 620). Aufgabe der Erfindung ist eine elastische Membran für atemgesteuerte Dosierventile für die Verwendung in Atemschutz- und Beatmungsgeräten, die bei den Temperaturen in einem Bereich zwischen -70°C und +80°C eine hohe Beständigkeit gegenüber den aggressiven Bestandteilen im Umgebungsmedium besitzt und gasundurchlässig bei guter Flexibilität ist.A known compressed gas breathing apparatus, which is used in particular for gas protection and diving purposes, is equipped with a lung-controlled air supply. In this device, a pressure-sensitive control element with a membrane is connected to the breathing gas line, which automatically opens or closes the compressed gas supply valve at a certain pressure. The membrane closes a housing through which the compressed gas flow to be inhaled is supplied. A lever is articulated in the middle of the membrane and is mounted in a bearing inside the housing. Against this lever, another lever is supported, with which the closure valve is operated to the compressed gas supply. To protect the membrane from the environment, it is covered with a cover. Bores in the lid create the pressure connections to the surrounding atmosphere. With the pressure difference between the environment and the pressure in the breathing tube, the membrane moves and thus controls the closure valve via the levers. The membrane is exposed on one side to the possibly aggressively contaminated outside atmosphere and on the other side to the pressurized gas. Material specifications for the membrane are not made. According to the representation in the drawing, however, it is a single-layer version. It will not withstand the aggressiveness of the surrounding atmosphere for long. In addition, the gas impermeability should not be sufficient. The stored breathing gas supply is unnecessarily burdened. (DE-PS 959 620). The object of the invention is an elastic membrane for breath-controlled metering valves for use in breathing apparatus and respirators, which has a high resistance to the aggressive constituents in the ambient medium at temperatures in a range between -70 ° C and + 80 ° C and gas-impermeable with good Is flexibility.

Die Lösung der Aufgabe erfolgt gemäß dem Kennzeichen des Anspruches 1.The problem is solved according to the characterizing part of claim 1.

Weitere Merkmale im Rahmen der Erfindung ergeben sich aus den Unteransprüchen.Further features within the scope of the invention result from the subclaims.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß mit der Kombination der für die Membran verwendeten Materialien im Bereich der Temperaturgrenzen -70°C und +80°C eine gute Gasdichtigkeit bei ausreichender Elastizität und damit Beweglichkeit garantiert ist. Mit der Wahl des Materials für die Einlage wird eine weitere Anpassung an spezielle Aufgaben möglich.The advantages achieved by the invention are, in particular, that the combination of the materials used for the membrane in the range of the temperature limits -70 ° C. and + 80 ° C. guarantees good gas tightness with sufficient elasticity and thus mobility. With the choice of material for the insert, further adaptation to special tasks is possible.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden beschrieben. Es zeigen

  • Fig. 1 einen Schnitt durch das Dosierventil,
  • Fig. 2 die Einzelheit Z.
An embodiment of the invention is shown in the drawing and is described below. Show it
  • 1 shows a section through the metering valve,
  • Fig. 2 shows the detail Z.

Das atemgesteuerte Dosierventil 1 ist mit dem Anschlußstutzen 2 in bekannter Weise an die Atemgasversorgung, z. B. einen Druckminderer vor einer Preßgasflasche, angeschlossen. Das Gehäuse 3 ist über den Stutzen 4 an den Atemschlauch angeschlossen. Das Gehäuse 3 ist durch die Membran 5 abgeschlossen. Diese wird auf der dem Gehäuseinnern 12 zugewandten Seite vom Druck des Atemkreises und auf der anderen Seite 13 von dem Druck in dem Umgebungsmedium beaufschlagt. Die Membran 5 betätigt über den Steuerhebel 6 den Ventilverschlußkörper 7 des Dosierventils 1. Der Dekkel 8 mit Löchern 9 schützt die Membran 5.The breath-controlled metering valve 1 is connected to the connecting piece 2 in a known manner to the breathing gas supply, for. B. connected a pressure reducer in front of a compressed gas bottle. The housing 3 is on the connector 4 to the breathing tube connected. The housing 3 is closed by the membrane 5. This is acted upon on the side facing the housing interior 12 by the pressure of the breathing circuit and on the other side 13 by the pressure in the ambient medium. The membrane 5 actuates the valve closure member 7 of the metering valve 1 via the control lever 6. The cover 8 with holes 9 protects the membrane 5.

Die Membran besteht, wie Fig. 2 zeigt, aus der Einlage 10 aus einem Gewebe, die beidseitig beschichtet ist. Die dem Gehäuseinnern 12, also dem Atemgas zugewandte Innenschicht 14 der Membran ist aus einem Polypropylenoxid-Kautschuk, z.B. aus Parel-Elastomer. Dieses Material ist außerordentlich gasdicht und bleibt auch bei den geforderten tiefen Temperaturen von -70°C flexibel. Die Außenschicht 15, die dem möglicherweise aggressiven Umgebungsmedium ausgesetzt ist, ist ein Silicon-Elastomer. Mit dem Silicon-Elastomer wird die für dieses Material bekannte hohe chemische Beständigkeit gegen die umgebenden Gase oder Flüssigkeiten erreicht.2, the membrane consists of the insert 10 made of a fabric that is coated on both sides. The inner layer 14 of the membrane facing the housing interior 12, i.e. the breathing gas, is made of a polypropylene oxide rubber, e.g. made of Parel elastomer. This material is extremely gas-tight and remains flexible even at the required low temperatures of -70 ° C. The outer layer 15, which is exposed to the possibly aggressive surrounding medium, is a silicone elastomer. With the silicone elastomer, the high chemical resistance to the surrounding gases or liquids known for this material is achieved.

Claims (5)

1. Membran für atemgesteuertes Dosierventil in Atemschutz-und Beatmungsgeräten, dadurch gekennzeichnet, daß sie aus einer beidseitig beschichteten Einlage (10) besteht, deren dem Umgebungsmedium zugewandte Außenschicht (15) aus einem Silicon-Elastomer und die dem Gehäuseinnern (12), also dem Atemgas zugewandte Innenschicht (14) aus einem Polypropylenoxid-Kautschuk besteht.1. Membrane for breath-controlled metering valve in breathing apparatus and respirators, characterized in that it consists of an insert (10) coated on both sides, the outer layer (15) of the silicone medium facing the ambient medium and the one of the housing interior (12), that is to say the Breathing gas facing inner layer (14) consists of a polypropylene oxide rubber. 2. Membran nach Anspruch 1, dadurch gekennzeichnet, daß die Einlage (10) ein Gewebe ist.2. Membrane according to claim 1, characterized in that the insert (10) is a fabric. 3. Membran nach Anspruch 1, dadurch gekennzeichnet, daß die Einlage (10) ein Vlies ist.3. Membrane according to claim 1, characterized in that the insert (10) is a fleece. 4. Membran nach Anspruch 1, dadurch gekennzeichnet, daß die Einlage (10) ein Papier ist.4. Membrane according to claim 1, characterized in that the insert (10) is a paper. 5. Membran nach Ansoruch 1 und einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die Innenschicht (14) ein Parel-Elastomer ist.5. Membrane according to Ansoruch 1 and one of claims 2 to 4, characterized in that the inner layer (14) is a Parel elastomer.
EP19790102997 1978-12-01 1979-08-17 Diaphragm for a breath-controlled dosing valve Withdrawn EP0011682A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2852016 1978-12-01
DE19782852016 DE2852016A1 (en) 1978-12-01 1978-12-01 DIAPHRAGM FOR BREATH-CONTROLLED DOSING VALVE

Publications (1)

Publication Number Publication Date
EP0011682A1 true EP0011682A1 (en) 1980-06-11

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EP19790102997 Withdrawn EP0011682A1 (en) 1978-12-01 1979-08-17 Diaphragm for a breath-controlled dosing valve

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US (1) US4306584A (en)
EP (1) EP0011682A1 (en)
DE (1) DE2852016A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10159219A1 (en) * 2001-11-27 2003-06-12 Msa Auer Gmbh Respirator mask for SCBA
EP2514484A3 (en) * 2011-04-18 2015-03-18 Draeger Safety UK Ltd. Diaphragm for a lung demand valve

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US4494537A (en) * 1982-06-08 1985-01-22 Gottlieb Mark P Breathing apparatus for supplying fluid to a user on demand
US4574797A (en) * 1983-05-09 1986-03-11 Tony Christianson Diaphragm and exhaust valve for second stage regulator
JPH06191481A (en) * 1992-12-22 1994-07-12 Zexel Corp Mouth piece for semi-closed type breather
US6255633B1 (en) 1999-12-28 2001-07-03 Toshiba Tec Kabushiki Kaisha Fixing device using induction heating
US7028689B2 (en) 2001-11-21 2006-04-18 3M Innovative Properties Company Filtering face mask that uses an exhalation valve that has a multi-layered flexible flap
US8025053B1 (en) * 2003-06-26 2011-09-27 Mine Safety Appliances Company Pressure regulator assembly
US9770611B2 (en) 2007-05-03 2017-09-26 3M Innovative Properties Company Maintenance-free anti-fog respirator
US20080271739A1 (en) 2007-05-03 2008-11-06 3M Innovative Properties Company Maintenance-free respirator that has concave portions on opposing sides of mask top section
GB0710048D0 (en) * 2007-05-25 2007-07-04 Concept 2 Manufacture Design O A Regulator allowing gas mixing on demand

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Publication number Priority date Publication date Assignee Title
DE716359C (en) * 1939-12-02 1942-01-17 Harry Sauveur Dipl Ing Composite flexible skin for the elastic closure of rooms, especially acid pumps
DE801059C (en) * 1949-10-01 1950-12-21 Ernst Dr Schnabel Membrane, seal or the like made of rubber or plastic with an insert and method for their production
DE1031238B (en) * 1952-05-09 1958-06-04 Chemieprodukte G M B H Diaphragm for pressure regulator or gas meter
DE959620C (en) * 1955-04-26 1957-03-07 Draegerwerk Ag Compressed gas breathing apparatus
CH389328A (en) * 1960-04-14 1965-03-15 Hoechst Ag Diaphragm for diaphragm pumps
DE1400579A1 (en) * 1960-08-01 1968-10-24 Hills Mccanna Co Membrane for shut-off devices and process for producing the same
DE2414381A1 (en) * 1973-04-04 1974-10-24 Hills Mccanna Company Ges N D Radioactivity-resistant valve membrane - made of two types of elastomer vulcanised together

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10159219A1 (en) * 2001-11-27 2003-06-12 Msa Auer Gmbh Respirator mask for SCBA
DE10159219B4 (en) * 2001-11-27 2005-09-29 Msa Auer Gmbh Respiratory mask for a compressed air breathing apparatus
US7673630B2 (en) 2001-11-27 2010-03-09 Msa Auer Gmbh Respiratory protection mask for a compressed air breathing apparatus
US8245712B2 (en) 2001-11-27 2012-08-21 Msa Auer Gmbh Respirator mask for a compressed air breathing apparatus
EP2514484A3 (en) * 2011-04-18 2015-03-18 Draeger Safety UK Ltd. Diaphragm for a lung demand valve
GB2532391A (en) * 2011-04-18 2016-05-18 Draeger Safety Uk Ltd Diaphragm
GB2490197B (en) * 2011-04-18 2016-08-17 Draeger Safety Uk Ltd Diaphragm
GB2532391B (en) * 2011-04-18 2016-09-14 Draeger Safety Uk Ltd Diaphragm
EP3238787A1 (en) * 2011-04-18 2017-11-01 Draeger Safety UK Limited Diaphragm

Also Published As

Publication number Publication date
US4306584A (en) 1981-12-22
DE2852016A1 (en) 1980-06-04

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