DK154867B - Apparatus for adjusting the flow of a liquid from a high-level liquid container to a lower-level consumer - Google Patents
Apparatus for adjusting the flow of a liquid from a high-level liquid container to a lower-level consumer Download PDFInfo
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- DK154867B DK154867B DK196678AA DK196678A DK154867B DK 154867 B DK154867 B DK 154867B DK 196678A A DK196678A A DK 196678AA DK 196678 A DK196678 A DK 196678A DK 154867 B DK154867 B DK 154867B
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- housing
- swimmer
- filter
- shaped
- liquid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/36—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body
- A61M5/40—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body using low-level float-valve to cut off media flow from reservoir
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/1411—Drip chambers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16877—Adjusting flow; Devices for setting a flow rate
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Animal Behavior & Ethology (AREA)
- Anesthesiology (AREA)
- General Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Vascular Medicine (AREA)
- Veterinary Medicine (AREA)
- Emergency Medicine (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
- Food-Manufacturing Devices (AREA)
Description
1 DK 154867 B1 DK 154867 B
Opfindelsen angår et apparat til indstilling af gennemstrømningen af en væske fra en i et højere niveau anbragt væskebeholder til en i et lavere niveau liggende forbruger, navnlig i forbindelse med indretninger til intravenøs infusion af væsken, med et hus, der har en indløbsåbning og en udløbsåbning, og en svømmer, der er anbragt i huset og er bevægelig i et svømmerkammer, og som ved sin øvre ende bærer et ventillegeme med henblik på at lukke indløbs åbningen ved en forudbestemt væskehøjde i svømmerkammeret, samt med et manuelt betjelig ventillegeme til indstilling eller afspærring af udløbsåbningens tværsnit.The invention relates to an apparatus for adjusting the flow of a liquid from a higher-level liquid container to a lower-level consumer, in particular in connection with devices for intravenous infusion of the liquid, with a housing having an inlet opening and an outlet opening and a float disposed in the housing and movable in a float chamber, which at its upper end carries a valve body to close the inlet opening at a predetermined fluid height in the float chamber, and with a manually operable valve body for adjustment or shut-off of the outlet opening cross section.
Ved et kendt apparat af denne art er svømmeren udformet som et cylindrisk legeme, og væsken, der som regel kun tilføres appara-In a known apparatus of this kind, the swimmer is designed as a cylindrical body, and the liquid, which is usually supplied only to the apparatus.
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tet dråbevis fra indløbsåbningen, samler sig på den øvre, hovedsagelig horisontale endeflade af svømmeren og kan ikke passere uforstyrret derfra frem til udløbsåbningen. Ved infusioner, som dette apparat hovedsagelig anvendes til, er det imidlertid væsentligt, at strømmen af opløsning, der passerer gennem apparatet og skal indføres i en vene i en patient, er ensartet og ikke hindres.dropwise from the inlet opening, collects on the upper, mainly horizontal end face of the swimmer and cannot pass undisturbed therefrom until the outlet opening. However, in infusions for which this apparatus is mainly used, it is essential that the flow of solution passing through the apparatus and to be introduced into a vein in a patient is uniform and not obstructed.
Opfindelsen har til formål at udforme det indledningsvis omhandlede apparat på en sådan måde, at der sikres en uhindret passage af væsken gennem huset, hvori svømmeren er anbragt.The invention has for its object to design the apparatus referred to at the outset in such a way as to ensure an unobstructed passage of the liquid through the housing in which the swimmer is placed.
Til opnåelse heraf er apparatet ifølge opfindelsen ejendommelig ved, at svømmeren i længdesnit er udformet hovedsagelig ægformet med en opadrettet spids.To achieve this, the apparatus according to the invention is characterized in that the longitudinal swimmer is formed essentially egg-shaped with an upward point.
Med denne udformning skabes der mulighed for, at væsken, der fra indløbsåbningen flyder eller drypper ned på svømmeren, kan passere uforstyrret og uhindret som en ensartet strøm langs svømmerens krumme væg.This design allows the fluid that flows or drips down on the float from the inlet opening to pass undisturbed and unobstructed as a uniform flow along the swimmer's curved wall.
En foretrukken udførelsesform for apparatet ifølge opfindelsen er ejendommelig ved, at vinklen mellem svømmerens længdeakse og tangenten ved dens øvre endepunkt, dvs. i overgangen fra svømmervæggen til ventilstødstangen, andrager ca. 45°.A preferred embodiment of the apparatus according to the invention is characterized in that the angle between the longitudinal axis of the swimmer and the tangent at its upper end point, ie. in the transition from the float wall to the valve thrust bar, amounts to approx. 45 °.
Ifølge opfindelsen kan svømmeren ved sin nedre ende hensigtsmæssigt have en hovedsagelig halvkugleformet næse eller kuppelformet del, der består af et fleksibelt materiale, og ved hjælp af hvilken en hovedsagelig halvkugleformet afrundet forbindelseskanal mellem svømmerkammeret og udløbsåbningen kan lukkes tæt.According to the invention, the swimmer at its lower end may conveniently have a substantially hemispherical nose or dome-shaped portion consisting of a flexible material and by means of which a substantially hemispherical rounded connecting channel between the swimmer chamber and the outlet opening can be closed tightly.
På den nedre ende af den kuppelformede del eller næse kan der ifølge opfindelsen være påsat en f.eks. pilformet føringsstift, som alt efter stillingen af svømmeren strækker sig mere eller mindre ind i forbindelseskanalen.On the lower end of the dome-shaped part or nose, according to the invention, an e.g. arrow shaped guide pin which extends more or less into the connecting channel, depending on the position of the swimmer.
Ventillegemet, der er anbragt ved den øvre ende af svømmeren, har fortrinsvis en kegleformet flade, der samvirker med et.< kegleformet sæde i indløbsåbningen med henblik på at åbne ellerThe valve body disposed at the upper end of the float preferably has a cone-shaped surface which cooperates with a cone-shaped seat in the inlet opening for opening or closing.
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lukke denne, og en cylindrisk føringsstift, der slutter sig til fladen foroven, og som strækker sig permanent med spillerum aksialt gennem indløbsåbningen.close this and a cylindrical guide pin joining the surface at the top and extending permanently with clearance axially through the inlet opening.
De to føringsstifter bevirker, at svømmeren holdes i en hovedsagelig vertikal stilling, fra hvilken der kun kan ske ringe udbøj-ninger på grund af spillerummet mellem føringsstifterne og de boringer, som føringsstifterne strækker sig igennem.The two guide pins cause the swimmer to be held in a substantially vertical position, from which only slight deflections can occur due to the clearance between the guide pins and the bores through which the guide pins extend.
En anden fordelagtig udførelsesform for apparatet ifølge opfindelsen er ejendommelig ved, at huset har et keglestubformet dæksel med afluftningsåbninger, og at der mellem dækslet og huset er anbragt et filter, navnlig et hydrofobt eller vandskyende filter. Dette filter kan have form af en tragt og ifølge opfindelsen bestå af et silikoneimprægneret filterpapir.Another advantageous embodiment of the apparatus according to the invention is characterized in that the housing has a cone-shaped cover with vent openings and that a filter, in particular a hydrophobic or water-repellent filter, is arranged between the cover and the housing. This filter may take the form of a hopper and according to the invention consist of a silicone impregnated filter paper.
I en udførelsesform for apparatet ifølge opfindelsen, som muliggør en enkel anbringelse og fastholdelse af filteret, har huset ringformede noter, og dækslet tilsvarende ringformede ribber, der kan indgribe med snapvirkning i noterne på en sådan måde, at filterpapiret fastholdes mellem ribberne og noterne.In one embodiment of the apparatus according to the invention, which allows for simple application and retention of the filter, the housing has annular grooves and the cover has similar annular ribs which can engage with snap action in the grooves in such a way that the filter paper is held between the ribs and the grooves.
Med denne udformning kan dækslet anbringes hurtigt og enkelt på huset på en sådan måde, at filteret fastholdes sikkert og tæt.With this design, the cover can be placed quickly and simply on the housing in such a way that the filter is held securely and tightly.
Det manuelt betjenelige ventillegeme kan ifølge opfindelsen hensigtsmæssigt have en kegleformet indstillingsspids med lille kegleåbningsvinkel med henblik på at kunne finindstille udløbsåbningens tværsnit. Ventillegemet, der kan have et indstillings hoved, på hvilket der kan være anbragt en passende skala, kan ifølge opfindelsen fastholdes i den indstillede stilling ved hjælp af en trykfjeder anbragt mellem huset og hovedet på ventillegemet.According to the invention, the manually operable valve body may conveniently have a cone-shaped adjusting tip with a small cone opening angle in order to fine-tune the cross-section of the outlet opening. The valve body, which may have an adjusting head on which a suitable scale may be placed, can according to the invention be held in the adjusted position by means of a compression spring arranged between the housing and the head of the valve body.
Opfindelsen forklares nærmere i det følgende under henvisning til tegningen, hvor fig. 1 visér i snit en foretrukken udførelsesform for apparatet ifølge opfindelsen, og fig. 2 i snit en detalje ved en svømmer, der indgår i apparatet.The invention will be explained in more detail below with reference to the drawing, in which fig. 1 is a sectional view of a preferred embodiment of the apparatus according to the invention; and FIG. 2 shows in section a detail of a swimmer included in the apparatus.
Det på tegningen viste apparat, der i sin helhed er betegnet 10, har et hus 12 med en indløbsåbning 14 foroven og en udløbsåbning 16 forneden. Huset 12 er vist i brugsstilling i fig. 1.The apparatus shown in the drawing, designated in its entirety 10, has a housing 12 with an inlet opening 14 at the top and an outlet opening 16 at the bottom. The housing 12 is shown in use in FIG. First
Huset 12 indeholder et svømmerkammer 72 med en svømmer 18, der er anbragt frit bevægeligt i svømmerkammeret 72, og hvis yderdiameter er så meget mindre end inderdiameteren af svømmerkammeret 72, at der sikres en uforstyrret og uhindret væskepassage nedad iThe housing 12 includes a float chamber 72 with a float 18 which is freely movable in the float chamber 72 and whose outer diameter is so much smaller than the inner diameter of the float chamber 72 that an undisturbed and unobstructed fluid passage is secured downward
1 I1 I
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området af svømmeren 18's ydervæg. Den største yderdiameter af svømmeren 18 er under alle omstændigheder så meget mindre end inderdiameteren af svømmerkammeret 72, at der ikke kan optræde kapillarkræfter mellem svømmeren 18 og svømmerkammeret 72. På svømmerkammeret 72's indervæg er der i passende indbyrdes afstande udformet langsgående føringsribber 34, der centrerer og fører svømmeren 18 i svømmer kammer et 72, hvis dette måtte være ønskeligt eller nødvendigt.the area of the outer wall of the swimmer 18. In any case, the largest outer diameter of the float 18 is so much smaller than the inner diameter of the float chamber 72 that no capillary forces between the float 18 and the float chamber 72 can occur. the swimmer 18 leads in the swimmer chamber a 72 if this is desired or necessary.
Svømmeren 18 har i længdemidtersnit hovedsagelig form af et æg, hvis spids er rettet opad. På den øvre ende af svømmeren 18 er der anbragt en ventilstødstang 20 af hovedsagelig cylindrisk form, som hensigtsmæssigt er udført i ét stykke med svømmeren 18. Ventilstødstangen 20 har en kegleformet ansats 22, der samvirker med et tilsvarende kegleformet ventilsæde i indløbsåbningen 14 med henblik på at lukke eller åbne denne. Til den kegleformede ansats 22 slutter der sig en cylindrisk, hovedsagelig nåleformet føringsstift 24, der strækker sig gennem indløbsåbningen 14, pg hvis yderdiameter er mindre end den mindste inderdiameter af indløbsåbningen 14, som bortset fra det kegleformede ventilsæde er hovedsagelig cylindrisk. Diameteren af føringsstiften 24 kan f.eks. andrage indtil 0,5 mm. Føringsstiften 24 dimensioneres så lille som mulig for at holde inderdiameteren af indløbsåbningen 14 tilsvarende lille, alt med henblik på at gøre den nedadrettede kraft, der af væskens vægt udøves mod ventilstødstangen 20, så lille som mulig. Dette er navnlig hensigtsmæssigt ved vanskelige arbejdsbetingelser.The swimmer 18, in longitudinal section, is mainly in the form of an egg whose tip is directed upwards. On the upper end of the float 18 is provided a valve thrust bar 20 of substantially cylindrical shape which is conveniently integral with the builder 18. The valve thrust 20 has a cone-shaped shoulder 22 which cooperates with a corresponding cone-shaped valve seat in the inlet opening 14 for to close or open this one. To the cone-shaped shoulder 22 is joined a cylindrical, generally needle-shaped guide pin 24 extending through the inlet opening 14, the outer diameter of which is smaller than the smallest inner diameter of the inlet opening 14, which, apart from the cone-shaped valve seat, is substantially cylindrical. The diameter of the guide pin 24 may e.g. to 0.5 mm. The guide pin 24 is dimensioned as small as possible to keep the inner diameter of the inlet opening 14 correspondingly small, all in order to make the downward force exerted by the weight of the fluid against the valve thrust bar 20 as small as possible. This is especially useful in difficult working conditions.
Forskellen mellem inderdiameteren af indløbsåbningen 14 og yderdiameteren af føringsstiften 24 er imidlertid tilstrækkelig stor til at hindre, at der optræder kapillarkræfter mellem indløbsåbningen og føringsstiften.However, the difference between the inner diameter of the inlet opening 14 and the outer diameter of the guide pin 24 is sufficiently large to prevent capillary forces from occurring between the inlet opening and the guide pin.
Ventilstødstangen 20 er navnlig finbearbejdet, f.eks. poleret, i området af den kegleformede ansats 22, og den lukker indløbsåbningen 14 med en kraft, der er så lille som mulig, f.eks. en kraft af størrelsesordenen 1 g. Et formstof med let elasticitet er egnet som materiale til svømmeren og ventilstødstangen.In particular, the valve thrust bar 20 is finely machined, e.g. polished, in the region of the cone-shaped shoulder 22, and it closes the inlet opening 14 with a force as small as possible, e.g. a force of the order of 1 g. A resilient material with slight elasticity is suitable as material for the swimmer and valve thrust bar.
Overfladen af svømmeren 18 er ensartet og glat, fortrinsvis vandskyende, og vinklen mellem svømmerens aksiale længdeakse og tangenten ved dens øvre endepunkt, dvs. i overgangen fra svømmeren 18's ægformede væg til ventilstødstangen 20’s cylindriske væg, ligger inden for et område på ca. 45°. Vinklen bliver mindre langsThe surface of the swimmer 18 is uniform and smooth, preferably water-repellent, and the angle between the swimmer's axial longitudinal axis and the tangent at its upper end point, ie. in the transition from the egg-shaped wall of the swimmer 18 to the cylindrical wall of the valve thrust bar 20, lies within a range of approx. 45 °. The angle gets smaller along
c DK 154867 Bc DK 154867 B
5 kappefladen og når værdien nul ved kappens yderste punkt, dvs. at tangenten i dette punkt er parallel med længdeaksen.5 and the value reaches zero at the outermost point of the sheath, ie. that the tangent at this point is parallel to the longitudinal axis.
Svømmeren 18 har ved sin nedre ende en næse eller kuppelformet del 26, der består af et fleksibelt materiale, f.eks. latex-silikonegummi, og som tjener til tæt lukning af en forbindelseskanal 32, der fører fra svømmerkammeret 72 frem til udløbsåbningen 16. Den kuppelformede del 26 kan være udformet direkte på svømmeren 18, eller den kan som vist være påskudt svømmeren 18 via en hovedsagelig kugleformet ansats 28 udformet direkte på svømmeren 18. Den kuppelformede del eller næse 26 er udformet på en sådan måde, at der sikres en ensartet overgang fra svømmeren 18's krumning til næsen 26's krumning. Den fastholdes som nævnt ved hjælp af ansatsen 28, som den omslutter delvis, men den kan desuden være forbundet med svømmeren 18 ved hjælp af f.eks. klæbning. I det nedre område er den kuppelformede del 26 udformet hovedsagelig halvkugleformet, og den samvirker med en tilsvarende halvkugleformet afrunding, der er udformet i huset 12, og som slutter sig til forbindelseskanalen 32 foroven, alt med henblik på at lukke denne tæt, selv i tilfælde af, at svømmeren 18 ikke befinder sig i en vertikal stilling. Overfladen af den kuppelformede del 26 er som svømmeren 18's overflade glat og ensartet for at muliggøre en ensartet væskepassage nedad og hindre en vedhængning af luftblærer til overfladen af den kuppelformede del 26.The swimmer 18 has at its lower end a nose or dome-shaped portion 26 consisting of a flexible material, e.g. latex silicone rubber, which serves to close the closure of a connecting channel 32 leading from the float chamber 72 to the outlet opening 16. abutment 28 formed directly on the float 18. The dome-shaped portion or nose 26 is formed in such a way as to ensure a uniform transition from the curvature of the float 18 to the curvature of the nose 26. As mentioned, it is held by means of the bracket 28, which it partially encloses, but it can also be connected to the swimmer 18 by means of e.g. adhesion. In the lower region, the dome-shaped portion 26 is formed substantially hemispherically, and it cooperates with a corresponding hemispherical rounding formed in the housing 12, which joins the connecting channel 32 at the top, all in order to close it tightly, even in cases because the swimmer 18 is not in a vertical position. Like the surface of the swimmer 18, the surface of the dome-shaped portion 26 is smooth and uniform to allow for a uniform liquid passage downward and to prevent an adhesion of air bubbles to the surface of the dome-shaped portion 26.
På den hovedsagelig kugleformede ansats 28 er der forneden udformet en føringsstift 30, der i den viste udførelsesform er pilformet, og som strækker sig med spillerum ind i forbindelseskanalen 32. Ved hjælp af føringsstiften 30 opnås der en føring af svømmeren 18, navnlig dens nedre del, hvorved der skabes sikkerhed for, at forbindelseskanalen 32 lukkes pålideligt ved hjælp af den kuppelformede del 26, når denne ligger an mod huset 12's tilsvarende afrunding, som slutter sig til den øvre ende af føringskanalen 32. Længden af føringsstiften 30 er valgt således, at denne i enhver stilling af svømmeren 18 stadig strækker sig ind i forbindelseskanalen 32, så der sikres en permanent føring af svømmeren. Længden af føringsstiften 24 på ventilstødstangen 20 er også valgt således, at føringsstiften i enhver stilling af svømmeren 18 stadig strækker sig ind i den cylindriske del af indløbsåbningen 14. På denne måde er svømmeren 18 ført ved begge ender, uden at den frie gennemgang af væske gennem indløbsåbningen 14 og forbindelseskanalen 32 hindres i de tilsvarende stillinger af svømmeren 18.On the mainly spherical abutment 28, a guide pin 30 is formed below, which in the illustrated embodiment is arrow shaped and extends with clearance into the connecting channel 32. A guide pin 30 is obtained by means of the guide pin 30, in particular its lower part. thereby ensuring that the connecting channel 32 is reliably closed by the dome-shaped portion 26 as it abuts the corresponding rounding of the housing 12 which joins the upper end of the guide channel 32. The length of the guide pin 30 is selected such that this in any position of the swimmer 18 still extends into the connecting channel 32 to ensure a permanent guide of the swimmer. The length of the guide pin 24 on the valve thrust bar 20 is also selected such that the guide pin in any position of the float 18 still extends into the cylindrical portion of the inlet opening 14. In this way, the float 18 is guided at both ends without the free flow of liquid. through the inlet opening 14 and the connecting channel 32 are obstructed in the corresponding positions by the swimmer 18.
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Huset li kar på xnclkræclelsesste Jet til MiRflalsManalan 32 en ringformet ansats 70/ fig. 2, hvis inderdiameter er så meget større end yderdiameteren af føringsstiften 30/ at der ikke kan opstå kapillarkræfter mellem ansatsen og føringsstiften. Ansatsens inderdiameter holdes dog så lille som mulig for at gøre de nedadrettede sugekræfter, der kan indvirke på svømmeren, så små som mulig. Når svømmerens opdriftskraft er større end svømmerens vægt og eventuelle sugekræfter på dens nedre ende, løfter svømmeren sig fra den øvre åbning af forbindelseskanalen 32. Føringen af svømmeren 18 ved hjælp af føringsstifterne bevirker, at man stort set undgår forflytninger eller deformeringer.The housing is located on the xcircular stone Jet for MiRflalsManalan 32 an annular shoulder 70 / fig. 2, if the inner diameter is so much larger than the outer diameter of the guide pin 30 / that no capillary forces can occur between the guide and the guide pin. However, the inside diameter of the staff is kept as small as possible to minimize the downward suction forces that can affect the swimmer. When the buoyancy buoyancy is greater than the swimmer's weight and any suction forces at its lower end, the swimmer lifts from the upper opening of the connecting channel 32. The guiding of the swimmer 18 by means of the guide pins prevents displacements or deformations largely.
Den pilformede føringsstift 30 kan som den hovedsagelig kugleformede ansats 28 være udformet i ét stykke med svømmeren 18.The arrow-shaped guide pin 30 can, like the mainly spherical abutment 28, be integrally formed with the swimmer 18.
Som eksempel kan nævnes, at summen af en eventuelt på svømmeren virkende sugekraft og svømmerens vægt skal være mindre end opdriftskraften, som påvirker svømmeren, når svømmerkammeret er ca. 3/4 fyldt.By way of example, the sum of any suction force acting on the swimmer and the weight of the swimmer must be less than the buoyancy force affecting the swimmer when the swimmer chamber is approx. 3/4 filled.
Det halvkugleformede sæde mellem huset 12 og den kuppelformede del 26 samt dennes fleksibilitet bevirker, at der opnås en pålidelig og tæt lukning af forbindelseskanalen 32, selv når svømmeren ikke befinder sig i en fuldstændig vertikal stilling, eller den kuppelformede del 26 er en smule deformeret.The hemispherical seat between the housing 12 and the dome-shaped part 26 and its flexibility causes a reliable and tight closure of the connecting channel 32, even when the swimmer is not in a completely vertical position or the dome-shaped part 26 is slightly deformed.
I den viste udførelsesform har huset 12 et keglestubformet dæksel 36, der er forbundet med huset ved hjælp af en snapforbindelse. Med henblik herpå har dækslet 36 på sin indervæg to indbyrdes adskilte ribber 40, 42, der forløber ringformet langs dækslets indervasg, og som ligger i planer på tværs af dækslets symmetriakse. Huset 12 har tilsvarende noter, som ribberne 40, 42 kan komme i låseindgreb med eller snappe ind i under snapvirkning.In the embodiment shown, the housing 12 has a cone-shaped cover 36 which is connected to the housing by means of a snap connection. To this end, the cover 36 has on its inner wall two spaced apart ribs 40, 42 which extend annularly along the inner wall of the cover and which lie in planes across the axis of symmetry of the cover. The housing 12 has corresponding grooves that the ribs 40, 42 can engage or snap into during snap action.
Mellem huset 12 og daskslet 36 er der anbragt et filter 38, der f.eks. er membranformet, og som i den viste udførelsesform også er udført keglestubformet. Filteret 38 er fortrinsvis et hydrofobt eller vandskyende filter, der muliggør en afluftning af svømmerkammeret til atmosfæren, men hindrer gennemgang af væske. I området mellem bunden af noterne i huset 12 og ribberne 40, 42 er filteret 38 indspændt eller fastholdt langs sin samlede omkreds ved den øvre og nedre ende, så der sikres en tæt og steril lukning af filterkammeret. Filteret består af et fleksibelt materiale, f.eks.A filter 38 is arranged between the housing 12 and the casing 36, e.g. are diaphragm-shaped and, as shown in the embodiment, also cone-shaped. The filter 38 is preferably a hydrophobic or water-repellent filter which permits venting of the float chamber to the atmosphere, but prevents the flow of liquid. In the region between the bottom of the grooves in the housing 12 and the ribs 40, 42, the filter 38 is clamped or retained along its entire circumference at the upper and lower ends, ensuring a tight and sterile closure of the filter chamber. The filter consists of a flexible material, e.g.
7 DK 154867 B7 DK 154867 B
et silikoneimprægneret stof eller papir, eller et faseadskillende filterpapir, så filterkammeret afluftes og ventileres via filteret og tilsvarende af luftningsåbninger 44 i dækslet 3.6, uden at der kan ske afgang af væsken fra filterkammeret, f.eks. ien infusionsopløsning, navnlig på basis af vandagtige opløsninger. Filteret sikrer desuden effektivt mod, at der udefra trængerwand eller forureninger ind i filterkammeret. Den store filterflade sikrer en lille modstand mod gennemgang af luft. Filteret er tilstrækkeligt fleksibelt, så det uden risiko for ridser eller beskadigelser kan indspændes mellem noterne i huset 12 og ribberne 40, 42 i dækslet 36.a silicone-impregnated fabric or paper, or a phase separating filter paper so that the filter chamber is vented and vented through the filter and correspondingly of aeration openings 44 in cover 3.6, without the liquid from the filter chamber being discharged, e.g. an infusion solution, in particular on the basis of aqueous solutions. The filter also effectively ensures that outside walls or contaminants enter the filter chamber. The large filter surface ensures a small resistance to air passage. The filter is sufficiently flexible that it can be clamped between the grooves in the housing 12 and the ribs 40, 42 in the cover 36 without risk of scratches or damage.
I huset er der på forbindelseskanalen 32's nedstrømsside anbragt en manuelt betjenelig ventilstødstang 56, der har en næse eller indstillingsspids 58 udført svagt kegleformet, alt med henblik på at kunne bevirke finindstilling af tværsnittet af udløbsåbningen 16. Med henblik herpå har ventilstødstangen 56 et gevind 74, der kan indskrues i en tilsvarende gevindboring i huset 12.In the housing, on the downstream side of the connecting duct 32, a manually operated valve thrust rod 56 having a nose or adjusting tip 58 is slightly cone-shaped, all in order to fine-tune the cross-section of the outlet opening 16. For this purpose, the valve thrust rod 56 has a thread 74. which can be screwed into a corresponding threaded bore in the housing 12.
Når ventilstødstangen 56 er skruet helt ind i huset, er udløbsåbningen 16 lukket. Mellem huset 12 og ventilstødstangen 56 er der endvidere anbragt en passende tætning 60. Ventilstødstangen har et indstillingshoved 62, der på sin endeside bærer en ikke vist skala, der f.eks. er justeret til angivelse af dråber/minut eller cm / time. På huset findes der en passende markering, i forhold til hvilken hovedet 62 kan indstilles.When the valve thrust bar 56 is fully screwed into the housing, the outlet port 16 is closed. In addition, between the housing 12 and the valve thrust bar 56, a suitable seal 60 is provided. The valve thrust bar has an adjusting head 62 which carries on its end side a scale not shown, e.g. is adjusted to indicate drops / minute or cm / hour. There is an appropriate marking on the housing relative to which the head 62 can be adjusted.
Gevindet 74's stigning er valgt således, at ved en fuld omdrejning af indstillingshovedet 62 kan gennemgangsmængden indstilles fra nul til 100 dråber pr. minut. Med henblik på dette er gevindgængerne hensigtsmæssigt slebet eller poleret..The pitch of the thread 74 is selected such that, with a full rotation of the adjusting head 62, the throughput can be adjusted from zero to 100 drops per second. minute. To this end, the threaded threads are suitably sanded or polished.
Mellem huset 12 og ventilstødstangen 56's -indstillingshoved 62 er der anbragt en trykfjeder 64, der f.eks. kan bestå af en skruefjeder, fortrinsvis en formstof- eller gummifjeder, f.eks. i form af en elastisk bælg, som udover sin fjedrende egenskab yder ekstra beskyttelse mod indtrængning af kim i området af ventilstødv stangen.Between the housing 12 and the adjusting head 62 of the valve thrust rod 56 is arranged a compression spring 64 which e.g. may consist of a coil spring, preferably a plastic or rubber spring, e.g. in the form of an elastic bellows which, in addition to its resilient property, provides additional protection against the penetration of germs in the area of the valve thrust rod.
Fjederen tjener dels til at holde indstillingshovedet 62 i den indstillede position, så strømmen af infusionso]31øsning holdes konstant, dels til at modvirke eller kompensere for«sugekræfter, der eventuelt kan optræde i området af udløbsåbningen 16, og som kan ændre stillingen af ventilstødstangen. Fjederkraften må derfor være større end den maksimalt mulige sugekraft, men .må ikke være I*The spring serves partly to hold the adjusting head 62 in the set position so that the flow of infusion solution is kept constant, and partly to counteract or compensate for suction forces which may occur in the region of the outlet opening 16 and which may change the position of the valve thrust bar. The spring force must therefore be greater than the maximum possible suction force, but must not be *
8 DK 154867 B8 DK 154867 B
så stor, at gevindet på ventilstødstangen beskadiges eller deforneres.so large that the thread on the valve stem is damaged or distorted.
Fjederen 64 ligger an med en ende mod huset, medens dens anden ende hensigtsmæssigt indgriber i en ringnot 66 i indstillingshovedet 62, fig. 1, hvorved fjederen er understøttet og fastholdt, uden at der indvirkes ugunstigt på indstillingshovedet 6 2's drejbarhed.The spring 64 abuts one end against the housing, while its other end conveniently engages a ring groove 66 in the adjusting head 62; 1, whereby the spring is supported and retained without adversely affecting the rotatability of the adjusting head 6 2.
Huset 12 har ved sin øvre ende en skuebeholder 46, der strækker sig opad ud gennem dæsklet 36, og hvis øvre ende er forbundet med en slangetilslutningsstuds 48. Ved tilgangen fra slangetilslutningsstudsen 48 til skuebeholderen eller - glasset 46 er der hensigtsmæssigt anbragt et grovfilter 52. Som vist kan der endvidere findes en tragtformet bøsning 54, hvis afgangsåbning bestemmer dråbestørrelsen.The housing 12 has at its upper end a slide container 46 extending upwardly through the cover 36, the upper end of which is connected to a hose connection nozzle 48. At the entrance of the hose connection nozzle 48 to the slide container or glass 46, a coarse filter 52 is conveniently arranged. As shown, a funnel-shaped sleeve 54 can also be found, the outlet opening of which determines the droplet size.
For at opnå en lettere betjening kan slangetilslutningsstudsen 48 have et håndgreb 50.For easier operation, the hose connection nozzle 48 may have a handle 50.
Apparatet ifølge opfindelsen arbejder på følgende måde.The apparatus according to the invention works as follows.
Fra en ikke vist væskebeholder passerer der via slangetilslutningsstudsen 48 væske - f.eks. en opløsning, der skal tilføres en patient - gennem grovfilteret 52 og bøsningen 54 ind i skuebeholderen 46. Hvis indløbsåbningen 14 er åbnet, fig. 1, passerer væsken gennem indløbsåbningen 14 og langs ventilstødstangen 20 frem til svømmeren 18's yderflade. Derefter passerer opløsningen nedad langs den krumme kappeflade af svømmeren 18 og eventuelt den kuppelformede del 26 . Svømmeren 18 befinder sig i starten i området af forbindelseskanalen 32's åbning, der er lukket af den kuppelformede del 26. Når der har samlet sig tilstrækkelig væske i svømmerkammeret 72, løftes svømmeren 18 fra forbindelseskanalen 32 under virkning fra opdriftskraften, så væsken kan passere gennem forbindelseskanalen 32 frem til udløbsåbningen 16. Udløbsåbningen 16's gennemgangstværsnit er ved hjælp af ventilstødstangen 56 eller dennes indstillingsnæse 58 indstillet til en bestemt gennemgangsmængde, og denne mængde passerer da gennem udløbsåbningen 16 frem til en boring 68 og derfra via en ikke vist slangetilslutningsstuds og slange frem til patienten.From a liquid container not shown, 48 fluid passes through the hose connection socket - e.g. a solution to be fed to a patient - through the coarse filter 52 and the sleeve 54 into the slide container 46. If the inlet opening 14 is opened, FIG. 1, the liquid passes through the inlet opening 14 and along the valve thrust bar 20 to the outer surface of the swimmer 18. Thereafter, the solution passes downward along the curved casing surface of the swimmer 18 and optionally the dome-shaped portion 26. The float 18 is initially located in the region of the opening of the connecting duct 32, which is closed by the dome-shaped portion 26. When sufficient fluid has accumulated in the float chamber 72, the float 18 is lifted from the connecting duct 32 under the action of the buoyancy force so that the liquid can pass through the connecting duct 32 through the outlet opening 16. The passage cross-section of the outlet opening 16 is adjusted by means of the valve push rod 56 or its adjusting nose 58, and this amount then passes through the outlet opening 16 to a bore 68 and thence via a hose connection nozzle and tube to the patient. .
Hvis der gennem indløbsåbningen 14 passerer mere væske ind i svømmerkammeret 72, end der passerer bort gennem udløbsåbningen 16, bevæger svømmeren 18 sig stadig længere opad, indtil indløbsventilen lukkes, idet den koniske ansats 22 på ventilstødstangen 22 lægger sig an mod indløbsåbningen 14's koniske ventilsæde ogIf, through the inlet opening 14, more liquid passes into the float chamber 72 than passes away through the outlet opening 16, the float 18 moves further upwards until the inlet valve closes, as the tapered shoulder 22 on the valve thrust rod 22 engages the conical valve seat of the inlet opening 14 and
Claims (10)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2720522A DE2720522C3 (en) | 1977-05-06 | 1977-05-06 | Device for adjusting the flow of a liquid |
| DE2720522 | 1977-05-06 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK196678A DK196678A (en) | 1978-11-07 |
| DK154867B true DK154867B (en) | 1989-01-02 |
| DK154867C DK154867C (en) | 1989-05-16 |
Family
ID=6008277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK196678A DK154867C (en) | 1977-05-06 | 1978-05-05 | Apparatus for adjusting the flow of a liquid from a high level liquid container to a lower level consumer |
Country Status (13)
| Country | Link |
|---|---|
| AT (1) | AT364720B (en) |
| BE (1) | BE866751A (en) |
| CH (1) | CH633376A5 (en) |
| DE (1) | DE2720522C3 (en) |
| DK (1) | DK154867C (en) |
| ES (1) | ES469514A1 (en) |
| FR (1) | FR2389934B1 (en) |
| GB (1) | GB1554629A (en) |
| IE (1) | IE46878B1 (en) |
| IT (1) | IT1102845B (en) |
| LU (1) | LU79602A1 (en) |
| NL (2) | NL183984C (en) |
| SE (1) | SE442923B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4692151A (en) * | 1986-03-04 | 1987-09-08 | Blackman Seymour N | Parenteral fluid medication reservoir pump |
| DE4012012A1 (en) * | 1990-04-13 | 1991-10-17 | Int Watch Co Iwc | REPEATING WATCH |
| DE4012026A1 (en) * | 1990-04-13 | 1991-10-17 | Int Watch Co Iwc | ANCHOR DEVICE |
| DE4012010A1 (en) * | 1990-04-13 | 1991-10-17 | Int Watch Co Iwc | REPEATING WATCH |
| US6695004B1 (en) * | 2002-12-16 | 2004-02-24 | Alaris Medical Systems, Inc. | Magnetic automatic stop valve |
| KR100578001B1 (en) * | 2004-05-03 | 2007-11-30 | (주)이화바이오메딕스 | Regulator for quantity of injection |
| EP2363764B1 (en) | 2010-03-05 | 2015-09-16 | Montres Breguet SA | Device for sequentially controlling at least two lifts of a timepiece mechanism |
| GB201009375D0 (en) | 2010-06-04 | 2010-07-21 | Guy Ian | Intravenous infusion device |
| EP2498145B1 (en) * | 2011-03-08 | 2017-07-12 | Montres Breguet SA | Ringing mechanism with differentiated alarms |
| WO2013041916A1 (en) * | 2011-09-20 | 2013-03-28 | Wickramasinghe Nileththi Janaka | A drip set |
| CN103948989A (en) * | 2014-05-15 | 2014-07-30 | 山东建筑大学 | Throttling type intravenous infusion flow regulating device |
| NL2019820B1 (en) * | 2017-10-27 | 2019-05-06 | Wassenburg Medical B V | Air gap device and liquid disinfecting cartridge comprising the air gap device for a medical instrument cleaning and disinfecting apparatus |
| DE102019203846A1 (en) * | 2019-03-21 | 2020-09-24 | B. Braun Melsungen Aktiengesellschaft | Drip chamber arrangement for a medical infusion device |
| EP3953625A4 (en) | 2019-04-10 | 2023-04-26 | PAVmed Inc. | Systems and methods for a variable flow resistor |
| US20210113764A1 (en) * | 2019-10-16 | 2021-04-22 | Carefusion 303, Inc. | Drip chamber with needle valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1046352B (en) * | 1953-12-30 | 1958-12-11 | Thueringisches Kunstfaserwerk | Flow regulator |
| FR36695E (en) * | 1963-11-13 | 1930-07-19 | Dust cover and heat regulator shelf for radiators | |
| GB1414261A (en) * | 1972-03-24 | 1975-11-19 | Juzhny G Proektno Izyskatelsky | Apparatus for separating gases from a liquid stream |
| DE2644140C3 (en) * | 1976-09-30 | 1979-12-06 | Yarden Medical Engineering Ltd., Haifa (Israel) | Device for adjusting the flow of a liquid |
-
1977
- 1977-05-06 DE DE2720522A patent/DE2720522C3/en not_active Expired
-
1978
- 1978-05-02 SE SE7805076A patent/SE442923B/en not_active IP Right Cessation
- 1978-05-04 IT IT49207/78A patent/IT1102845B/en active
- 1978-05-05 LU LU79602A patent/LU79602A1/en unknown
- 1978-05-05 NL NLAANVRAGE7804841,A patent/NL183984C/en not_active IP Right Cessation
- 1978-05-05 GB GB18014/78A patent/GB1554629A/en not_active Expired
- 1978-05-05 ES ES469514A patent/ES469514A1/en not_active Expired
- 1978-05-05 FR FR7813426A patent/FR2389934B1/fr not_active Expired
- 1978-05-05 CH CH489478A patent/CH633376A5/en not_active IP Right Cessation
- 1978-05-05 BE BE187435A patent/BE866751A/en not_active IP Right Cessation
- 1978-05-05 DK DK196678A patent/DK154867C/en not_active IP Right Cessation
- 1978-05-05 AT AT0324778A patent/AT364720B/en not_active IP Right Cessation
- 1978-05-05 IE IE915/78A patent/IE46878B1/en not_active IP Right Cessation
-
1988
- 1988-06-28 NL NL8801639A patent/NL8801639A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DK154867C (en) | 1989-05-16 |
| FR2389934B1 (en) | 1983-05-13 |
| ATA324778A (en) | 1981-04-15 |
| DE2720522A1 (en) | 1978-11-16 |
| CH633376A5 (en) | 1982-11-30 |
| ES469514A1 (en) | 1979-01-01 |
| IT7849207A0 (en) | 1978-05-04 |
| BE866751A (en) | 1978-11-06 |
| NL8801639A (en) | 1988-10-03 |
| GB1554629A (en) | 1979-10-24 |
| DE2720522B2 (en) | 1979-05-31 |
| DE2720522C3 (en) | 1980-02-07 |
| FR2389934A1 (en) | 1978-12-01 |
| AT364720B (en) | 1981-11-10 |
| IT1102845B (en) | 1985-10-07 |
| NL183984C (en) | 1989-03-16 |
| NL7804841A (en) | 1978-11-08 |
| IE780915L (en) | 1978-11-06 |
| NL183984B (en) | 1988-10-17 |
| LU79602A1 (en) | 1979-09-10 |
| SE442923B (en) | 1986-02-03 |
| IE46878B1 (en) | 1983-10-19 |
| DK196678A (en) | 1978-11-07 |
| SE7805076L (en) | 1978-11-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |