DE1491664B1

DE1491664B1 - Device for the controlled enrichment of a carrier gas with a volatile anesthetic

Info

Publication number: DE1491664B1
Application number: DE19631491664D
Authority: DE
Inventors: William Edmondson; Wilfred Jones
Original assignee: Cyprane Ltd
Current assignee: Cyprane Ltd
Priority date: 1962-02-15
Filing date: 1963-02-15
Publication date: 1970-04-23
Also published as: US3192924A; GB968054A

Description

1 21 2

Die Erfindung betrifft eine Vorrichtung zum ge- für den Zweigstrom ergibt sich insbesondere nachThe invention relates to a device for the branch flow in particular arises after

regelten Anreichern eines Trägergases mit einem seiner Beladung mit dem Narkosemittel ein ungün-regulated enrichment of a carrier gas with one of its loading with the anesthetic is an unfavorable

flüchtigen Narkosemittel mit einer ein Regelventil stiger wenig glatter Strömungsweg durch die Bohrun-volatile anesthetic with a control valve that is not very smooth flow path through the

aufweisenden Hauptleitung für das Trägergas und gen im Kolbenschieber.having main line for the carrier gas and gene in the piston valve.

einer durch eine Verdampferkammer für das Narkose- 5 Der Erfindung liegt daher die Aufgabe zugrunde, mittel geführten Zweigleitung, die in Strömungsrich- eine Vorrichtung der eingangs genannten Art so zu tung des Trägergases vor dem Regelventil von der verbessern, daß die vorgenannten Nachteile ausge-Hauptleitung abgezweigt ist und hinter dem Regel- schaltet sind und eine noch feinfühligere Regelung ventil wieder in die Hauptleitung mündet und durch des Narkosemittelanteils im abgegebenen Gasdampfdas Regelventil absperrbar ist, wobei der Ventilkör- io gemisch erreicht wird. Diese Aufgabe wird dadurch per aus einer die Zweigleitung bei voll geöffneter gelöst, daß der Ventilkörper ein drehbar gelagerter Hauptleitung absperrenden Endstellung derart be- Schieber ist, der mit der in einer Platte vorgesehenen wegbar ist, daß zunächst die Zweigleitung freigegeben Abzweigöffnung bzw. Mündungsöffnung der Zweig- und dann die Hauptleitung fortschreitend gedrosselt leitung zusammenwirkt und zur Regelung des Durchwird. 15 trittsquerschnitts der Hauptleitung in diese hinein-one through a vaporizer chamber for the anesthetic 5 The invention is therefore based on the object medium-run branch line, a device of the type mentioned in the flow direction so too processing of the carrier gas upstream of the control valve of the improve that the aforementioned disadvantages out-main line is branched off and behind the control switch and an even more sensitive control valve opens into the main line again and through the anesthetic content in the released gas vapor Control valve can be shut off, the valve body mixture being reached. This is what makes this job by releasing the branch line when it is fully open, that the valve body is a rotatably mounted Main line shut-off end position is such a slide that is provided with the in a plate can be moved that initially the branch line is released branch opening or mouth opening of the branch and then the main line progressively throttled line interacts and regulates the Durchwird. 15 cross-section of the main line into this

Eine derartige Vorrichtung ist bereits bekannt. Da ragende Rippen aufweist, die zwei am Ventilgehäuse beim Betrieb der Vorrichtung ein im wesentlichen angeordneten Vorsprüngen mit entgegengesetzt gekonstanter Zweigstrom des Trägergases, beispiels- neigen Begrenzungsflächen gegenüberliegen, die auf weise Luft, Sauerstoff oder Stickstoffoxydul oder ein verschiedenen Seiten der Drehachse des Schiebers Gemisch dieser Stoffe, durch die Verdampfungskam- 20 vorgesehen sind.Such a device is already known. Since has protruding ribs, the two on the valve body in operation of the device a substantially arranged projections with oppositely constant ones Branch flow of the carrier gas, for example, tend to oppose boundary surfaces that are on wise air, oxygen or nitrogen oxide or a different side of the axis of rotation of the slide Mixture of these substances through the evaporation chamber 20 are provided.

mer geleitet wird und der Anteil des Narkosemittels Bei dieser Ausbildung ist tatsächlich nur ein am abgegebenen Gasdampfgemisch im wesentlichen Schieberventil vorhanden, das einzig und allein durch nur durch eine Regelung des nicht durch die Ver- Drehen aus der Endstellung heraus betätigt wird, dampferkammer geleiteten Trägergashauptstroms wobei zunächst die Zweigleitung freigegeben wird variiert wird, ist eine ziemlich feinfühlige Regelung 25 und direkt anschließend dann die Hauptleitung fortdes Narkosemittelanteils möglich. Dabei ist die be- schreitend gedrosselt wird. Es hat sich gezeigt, daß kannte Vorrichtung mit einem Kolbenschieber aus- durch das Zusammenwirken der Rippen des Schiegerüstet, der aus einer Endstellung durch axiale Ver- bers mit den Vorsprüngen des Ventilgehäuses bzw. lagerung in die Betriebsstellung gebracht wird. Dabei mit deren geneigten Begrenzungsflächen eine sehr werden der Einlaß und der Auslaß der Verdampfer- 30 feinfühlige Regelung des Narkosemittelanteils mögkammer, die in der Endstellung durch den Kolben lieh ist, wobei sich durch Austausch der Begrenabgesperrt sind, auf Umfangseinschnürungen des zungsflächen, die auf einfache Weise und mit großer Kolbenschiebers ausgerichtet, so daß ein Teil des Genauigkeit maschinell hergestellt werden können, Trägergasstroms als Zweigstrom vom einen Ende der jede gewünschte Regelcharakteristik erreichen läßt. Kolbenschieberkammer dem Verdampfereinlaß züge- 35 Dabei liegt der enge Regelquerschnitt zwischen dem führt wird und dann über eine auf den Verdampfer- Schieber bzw. den Schieberrippen und den geneigten auslaß ausgerichtete Radialbohrung in eine Axialboh- Begrenzungsflächen in Strömungsrichtung des Hauptrung des Kolbenschiebers eintritt, die an eine Misch- Stroms vor bzw. hinter dem Ventil, so daß der Hauptkammer angeschlossen ist. Die Mischkammer schließt strom nicht umgelenkt wird. Auch der Zweigstrom sich an das Ende der Kolbenschieberkammer an, dem 40 kann über den Verdampferkammerauslaß direkt in der Gesamtstrom an Trägergas zugeführt wird. Der den Trägergasstrom eingeleitet werden, so daß eine vom Ende der Kolbenschieberkammer in die Misch- einfache und kompakte Bauweise ohne eigene Mischkammer eintretende Hauptstrom wird durch ein kammer möglich ist. Ferner kann in einfacher Weise Tellerventil geregelt, das an einem Fortsatz des ein Ventildeckel vorgesehen sein, nach dessen Ab-Kolbenschiebers vorgesehen ist und nach der vorer- 45 nähme das Ventil ohne weiteres zugänglich ist. Daher wähnten Axialbewegung des Kolbenschiebers in die können gegebenenfalls auch ohne Schwierigkeiten die Betriebsstellung nur einen engen Durchfluß zwischen mit den Schieberrippen zusammenwirkenden Vorder Kolbenschieberkammer und der Mischkammer sprünge ausgetauscht werden, falls eine andere Regelfrei läßt. Dabei ist der Durchtrittsquerschnitt durch charakteristik erwünscht ist. mer is directed and the portion of the anesthetic in this training is actually only one there is essentially a slide valve on the emitted gas-vapor mixture, the only one through only through a regulation that is not actuated by twisting out of the end position, Steamer chamber directed carrier gas main flow whereby first the branch line is released is varied, a fairly sensitive control 25 and then the main line continues immediately afterwards Anesthetic portion possible. This is gradually being throttled. It has been shown that Known device with a piston valve - through the interaction of the ribs of the swing arm, which from an end position by means of axial connectors with the projections of the valve housing or storage is brought into the operating position. With their inclined boundary surfaces a very the inlet and outlet of the vaporizer 30 sensitive control of the anesthetic proportion are possible, which is borrowed in the end position by the piston, being blocked by exchanging the limit are, on circumferential constrictions of the tongue surfaces, which are easy and with large Piston valve aligned so that some of the accuracy can be machined Carrier gas flow as a branch flow from one end which can achieve any desired control characteristic. The piston valve chamber is connected to the evaporator inlet. The narrow cross-section lies between the and then over one to the evaporator slide or the slide ribs and the inclined Outlet-oriented radial bore in an Axialboh- limiting surfaces in the direction of flow of the main ring of the spool enters, which is connected to a mixed flow in front of or behind the valve, so that the main chamber connected. The mixing chamber closes the current is not diverted. Also the branch stream to the end of the piston valve chamber, the 40 can be directly inserted into the evaporator chamber outlet the total flow of carrier gas is supplied. The carrier gas stream are introduced so that a from the end of the piston valve chamber to the mixing - simple and compact design without its own mixing chamber The main stream entering is possible through a chamber. Furthermore, in a simple manner Regulated poppet valve, which can be provided on an extension of a valve cover, after its piston slide valve is provided and after the previous 45 took the valve is readily accessible. Therefore mentioned axial movement of the piston valve in the can possibly also without difficulty the Operating position only a narrow flow between cooperating with the slide ribs front The piston slide chamber and the mixing chamber can be replaced by leaps and bounds, if another one leaves the rule unchecked. The passage cross-section is desired by characteristic.

weitere Axialverschiebung des Kolbenschiebers mit- 50 Eine zweckmäßige Ausführungsform sieht vor, daßfurther axial displacement of the piston slide with 50 An expedient embodiment provides that

tels Verschraubung einstellbar. die Vorsprünge am Ventilgehäuse durch ein der Lage-adjustable by screw connection. the projections on the valve housing by one of the positional

Diese bekannte Ausbildung ist kompliziert, da sie rung der Welle des Schiebers dienendes Bauteil verpraktisch zwei Ventile umfaßt, nämlich das Kolben- bunden sind, das sich bis nahe an den Schieber bzw. Schieberventil für die Zweigleitung und das Teller- die Rippen erstreckt. Durch diese Maßnahme wird ventil für die Hauptleitung, die auch eine getrennte 55 eine stabile und kompakte Bauweise erreicht.
Betätigung erfordern, nämlich ein axiales Verlagern Ferner hat sich eine Ausführung als vorteilhaft des Kolbenschiebers zum Freigeben der Zweigleitung erwiesen, bei der die einander diametral gegenübersowie ein Drehen bzw. Verschrauben des Kolben- liegenden geneigten Begrenzungsflächen sich über Schiebers zur Regelung des Hauptstroms. Da außer- einen Bereich von jeweils etwa 90° um die Drehachse dem der Durchmesser des in der zylindrischen 60 des Schiebers erstrecken. Bei dieser Ausbildung wird Mischkammer angeordneten Tellerventils größer als ein entsprechend großer Drehbereich zur Feinregeder Durchmesser des benachbarten Endes der Kolben- lung des Narkosemittelanteils des abgegebenen Gasschieberkammer ist, ist bei der bekannten Vorrich- dampfgemisches erhalten, zu dem noch eine zusätztung der Einbau sowie Ausbau des Kolbenschiebers liehe Schieberdrehung zum Freigeben bzw. Abspererschwert, und außerdem sind die Ventile nicht leicht 65 ren der Zweigleitung hinzu kommen kann,
zugänglich. Ferner wird durch das Tellerventil der Bei einer zweckmäßigen Weiterbildung ist eine im Hauptstrom aus einer axialen Strömungsrichtung in Betätigungsorgan des Drehschiebers zugeordnete eine Radialströmungsrichtung umgeleitet, und auch Skala vorgesehen, die auf die Neigung der Begren-This known design is complicated because it practically comprises two valves for the shaft of the slide, namely the piston collars that extend close to the slide or slide valve for the branch line and the plate or ribs. By this measure, the valve for the main line, which also has a separate 55, achieves a stable and compact design.
Require actuation, namely an axial displacement. Furthermore, an embodiment of the piston valve for releasing the branch line has proven to be advantageous, in which the diametrically opposite and rotating or screwing of the piston inclined boundary surfaces over slide to regulate the main flow. Since an area of approximately 90 ° around the axis of rotation that the diameter of the in the cylindrical 60 of the slide extend. In this design, the poppet valve arranged in the mixing chamber is larger than a correspondingly large range of rotation for the fine regulator borrowed slide valve rotation to release or shut-off, and also the valves are not easy 65 ren the branch line can be added,
accessible. In an expedient development, a radial flow direction assigned in the main flow from an axial flow direction in the actuating member of the rotary slide valve is diverted through the poppet valve, and a scale is also provided which is based on the inclination of the limit

Claims

3 43 4

ting surfaces or the carrier regulated by this reading a scale with graduation marks 23 is matched to the upper gas flow rate. In this simple way side of the valve cover 16 facilitates
the device can be easily switched on again and again. The valve housing 6 comprises two downwards

represent that the released gas-vapor mixture the protruding projections 25 with downwardly pointing correct vapor portion or anesthetic portion ent- 5 boundary surfaces 26, which is in the same direction of rotation, from a higher point A, at which

The invention or advantageous details of the largest gap between the boundary surfaces 26 The invention is illustrated below with reference to schematic and the slide 19 is present, to a deeper one Drawings on an exemplary embodiment extend closer to the point at which this gap width is the smallest, ίο sten is. The corresponding gradient

F i g. 1 shows the device in a side view which is partially cut at an angle between the two boundary surfaces 26; vary from point A to point B , and it can

F i g. 2 shows the upper part of the device in such a way as to achieve any control characteristic on which Top view. the arrangement of the graduation marks 23 on the top

The device comprises a housing 1 in which a 15 of the valve cover 16 is matched. The inclined temperature-sensitive organ 2 is arranged, the surfaces 26 are immediately above a slide The position of a valve 3 controls the upright Riplaß located opposite an inlet 4 is assigned, through which the pen with anesthetic agent 27 of the valve slide 19, so that the ribs 27 to be loaded branch stream of the carrier gas flows. in the flow position of the slide 19 directly that

The cup-shaped housing 1 is located on its upper ao side of the ends A of the boundary surfaces, closed at the end by a plate 5 which is attached to which the maximum gap 28 between the limit underside of a valve housing 6. In the tongue surfaces 26 and the ribs 27 is present. Plate 5 is a branch opening 7 and a Mün- In this slide position of the carrier gas flow opening 8 is provided for the branch flow. The branch opening 7 from the inlet port 14 through the valve housing 6 is at its largest with an inlet chamber 9 as to the outlet port 15. If the slide is connected within this housing 1, which leads the inlet 4 to an evaporator chamber 10 via 19 from this end position or closed position. In this vaporizer chamber 10, the branch mouth opening 8 is opened, and the ribs 27 absorb anesthetic vapor, and the gas vapor approach the inclined delimiting surfaces 26, the mixture then passes through an opening 11 into an outlet - 30 whereby a branch flow of the carrier gas through the laßkammer 12, which leads to the orifice 8. Evaporation chamber 10 is guided and the carrier-With the aid of the valve 3 or the temperature-sensitive gas throughput through the valve housing 6 progressive organ 2 is achieved that a temperature is reduced. The boundary surfaces 26 and constant branch flow unaffected by changes in the flow, the ribs 27 associated therewith, can thus be passed through the evaporator chamber 10. It can be designed and arranged so that the main flow is shown in FIG. 1 indicated that, instead of the valve 3 assigned to the inlet of the carrier gas directly through the valve housing 6, the valve 3 can be shut off continuously with the temperature. The implementation of the sensitive organ 2 also to the opening 11 can, however, also be made in such a way that according to the ordered valve 3 'with a temperature sensitive F i g. 1 can also be provided in the slide position for a maximum organ 2 '. 40 paint anesthetic proportion still a minimum

The valve housing 6 is with an inlet nozzle gap 29 between the boundary surfaces 26 and the 14 for the carrier gas and an outlet nozzle 15 ribs 27 remain free, through which the carrier gas directly provided for the gas / vapor mixture to the known from the inlet nozzle 14 to the outlet nozzle 15 ter way a breathing mask flows for the person to be anesthetized.

Patient can be connected. The valve 45 according to FIG. 1 is on the underside of the housing 1 housing 6 is closed off by a valve cover 16, a device for filling in a liquid Narschlossen. cosmetic provided. The maximum fill level is

In the valve housing 6 a downward projecting is indicated by the line C. If the one of the central component 17 is arranged in which the shaft device is mounted 180 ° upside down or 90 ° to the 18 of a rotary slide 19, which is on the 50 side, the level of the anesthetic liquid runs essentially on the top of the plate 5 between the branches within the container 1 along the line D or E. Branch opening 7 and mouth opening 8 is applied. The course of these lines for the liquid level The upward out of the valve housing 6 shows that the inlet 4 and the opening 11 guided shaft 18 carries at its upper end a horizontal pivot lever 20, which is always above the liquid level, which is supported by a 55 regardless of the position of the device. The pre-slit 21 in the valve cover 16 protrudes outward and can therefore carry an actuating handle 22 at its outer end as a portable device. without the risk of liquid

According to FIG. 2, the slide 19 has a width, anesthetic agent reaches the valve housing 6. This would in fact exceed the diameter of the branch opening 7 or that would lead to an excessive dose of Betäu orifice opening 8, and the slide 19 would lead to 60 promotional means, even if the rotary slide 19 extends on opposite sides of the shaft would be in a position which is not an 18 so far radially outward that it corresponds to the branch opening 7 vapor mixture with a de-maximum anesthetic proportion in the dispensed gas-speaking angular position,
and covers the mouth opening 8, while in

different angular position these openings released 6 ₅ claims:

as shown in FIG. In this case, the definition 1. Device for the controlled enrichment of a

the angular position of the slide 19 an adjustment carrier gas with a volatile anesthetic

mark 24 is provided on the operating handle 22, which has a control valve having a main

line for the carrier gas and one passed through a vaporizer chamber for the anesthetic Branch line, which in the flow direction of the carrier gas upstream of the control valve of the Main line is branched off and flows back into the main line behind the control valve and can be shut off by the control valve, the valve body from a branch line at fully open main line shut-off end position is movable such that initially the Branch lines are released and then the main line is progressively throttled, thereby characterized in that the valve body is a rotatably mounted slide (19) with the branch opening (7) or mouth opening (8) of the branch line provided in a plate (5) (7-9-4-10-11-12-8) interacts and regulates the passage cross-section of the main line in this protruding ribs (27), the two arranged on the valve housing (6) fore ao Opposite cracks (25) with oppositely inclined boundary surfaces (26), which on different sides of the axis of rotation (18) of the slide are provided.

2. Apparatus according to claim 1, characterized in that the projections (25) on the valve housing (6) by a central component serving to support the shaft (18) of the slide (19) (17) are connected, which extends to close to the slide or the ribs (27).

3. Apparatus according to claim 1 or 2, characterized in that the diametrically opposed to each other opposing inclined boundary surfaces (26) extend over a range of approximately Extend 90 ° around the axis of rotation (18) of the slide (19).

4. Apparatus according to claim 1 to 3, characterized in that one of the actuating member (20 to 22) of the rotary valve (19) associated scale is provided, which is based on the inclination of the boundary surfaces (26) or the carrier gas throughput regulated by this is coordinated.

1 sheet of drawings