EP0755486B1 - Pump - Google Patents

Pump Download PDF

Info

Publication number
EP0755486B1
EP0755486B1 EP95916624A EP95916624A EP0755486B1 EP 0755486 B1 EP0755486 B1 EP 0755486B1 EP 95916624 A EP95916624 A EP 95916624A EP 95916624 A EP95916624 A EP 95916624A EP 0755486 B1 EP0755486 B1 EP 0755486B1
Authority
EP
European Patent Office
Prior art keywords
valve
web
pump
tongue
opening
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
EP95916624A
Other languages
German (de)
French (fr)
Other versions
EP0755486A1 (en
Inventor
Erwin Bolt
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.)
KNF Flodos AG
Original Assignee
KNF Flodos AG
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 KNF Flodos AG filed Critical KNF Flodos AG
Publication of EP0755486A1 publication Critical patent/EP0755486A1/en
Application granted granted Critical
Publication of EP0755486B1 publication Critical patent/EP0755486B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
    • F04B53/1092—Valves; Arrangement of valves inlet and outlet valve forming one unit and one single element forming both the inlet and outlet closure member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1037—Flap valves
    • F04B53/1047—Flap valves the valve being formed by one or more flexible elements
    • F04B53/105—Flap valves the valve being formed by one or more flexible elements one flexible element oscillating around a fixed point
    • 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
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7879—Resilient material valve
    • Y10T137/7888—With valve member flexing about securement
    • Y10T137/7891—Flap or reed

Definitions

  • the invention relates to a pump with the pumped medium controlled tongue valves housed in the pump head in the closed position on a valve sealing surface of the pump head apply as well as in the open position in a recess of the Dodge valve head for valve opening movement, whereby the valves one or more rubber valve disks or have a rubbery material in the or which are characterized in particular by part-ring-shaped recesses bounded valve tongues are located, which are articulated via a web are connected to the rest of the valve disc and in each case in the area surrounding a valve, the valve disc between Pump head parts is clamped.
  • Such a pump is known from DE-U-87 02 221.
  • the valves perform their opening and closing movements as synchronously or congruently as possible with the diaphragm lifting and lowering movements and thus as long as possible - and reach closing times.
  • the problem with these diaphragm pumps with reed valves is that, in the area of the external clamping of the valve disc by the pump head parts, pressure is applied to the valve plate located therebetween, which is made of rubber or a rubber-like material, and that this leads to material displacement.
  • the displaced material Due to the proximity of the clamping point to the valve tongue, the displaced material also influences the valve tongue, since transmission via the bridge-like connecting web is possible. This material displacement can lead to an undesirable deformation of the web and also the valve tongue. Such a deformation of the web or the valve tongue results in an impairment in the sense that the opening and closing movement or the opening and closing speed is impeded. This results in a deterioration in the valve response time.
  • the object of the present invention is to use a pump To create tongue valves of the type mentioned, whose Response times are improved so that the pump is also special can be used well for high working speeds.
  • the self-priming and volumetric Efficiency be improved.
  • the invention proposes, in particular, that at least one recess or interruption of the valve disc is provided in a connection area between the valve tongue, web and external clamping, adjacent to the web, facing away from the valve tongue, and that the width of the recess in the direction of the connecting line between Valve tongue, web and external clamping corresponds at least to the extent of a material displacement resulting from the external clamping. Material displacements originating from the clamping area no longer reach through the recess provided to the web and via this into the area of the valve tongue.
  • the interruption or recess practically creates a buffer space in which material displacements can escape without having any further effect on the other side.
  • the distance between the outer clamping and the valve tongue or the web could also be increased in order to reduce the effects of the material displacement that occurs, but this is practically impossible because of the limited space in the pump head.
  • the effects of material displacement can be kept practically completely away from the valve tongue, although this is also possible under the given, restricted space.
  • the intended width of the recess creates enough free space to keep material displacements or material displacements from clamping the valve disk away from the web and the valve tongue.
  • the recess located in the extension of the valve tongue and web extends laterally and preferably symmetrically in the valve disk over the direct projection extension of the web. A lateral "bypassing" of the recess with an influence on the valve tongue is thereby avoided.
  • a diaphragm pump 1 shown in FIG. 1 has a crank mechanism 3 in a crankcase 2, which is connected to a diaphragm 5 via a connecting rod 4.
  • the pump chamber 6 delimited on one side by the membrane 5 is delimited on the opposite side by an intermediate plate 8 belonging to the pump head 7.
  • a head plate 9 connects to the intermediate plate 8.
  • An inlet valve 10 and an outlet valve 11 are located in the pump head 7. Both valves are designed as tongue valves which each rest on valve sealing surfaces 12 in the closed position. Opposite these valve sealing surfaces 12 there are recesses 13 into which the valve tongues 14 belonging to the valves can dodge during a valve opening movement.
  • valves have a preferably common valve disk 15, in which the valve tongues 14 are located, which are delimited by annular recesses 16 (see FIG. 3).
  • the valve disc 15 is clamped between the head plate 9 and the intermediate plate 8 of the pump head 7. The clamping points each delimit the area of the inlet valve 10 and the outlet valve 11 and also seal these areas from one another.
  • FIGS. 2 and 3 there is a web 17 between the opposite ends of the partially annular recess 16 which delimits the valve tongues 14 and on which the valve tongue 14 is movably held and connected to the remaining valve disk 15.
  • the valve disc 15 is clamped in the area delimited in FIG. 3 between the top plate 9 and the intermediate plate 8 (see also FIG. 2). This clamping inevitably displaces the material of the elastic valve disk 15 located in between. If the effects of such a material displacement reach the area of the bridge-like web 17 or even the area of the valve tongue 14, this can result in a corresponding deformation.
  • Such a deformation can have the consequence that the bending stability in the region of the valve tongue and / or of the web 17 changes in an uncontrolled manner, so that the intended sequence of movements when opening and closing the valve tongue 14 is no longer guaranteed to the desired extent.
  • a recess 19 is provided in the valve disc 15 between the clamping area 18 adjacent to the web 17 and the web 17. This recess 19 forms an interruption and a buffer area in the connection area between the web 17 and the clamping area 18, by means of which a transfer of material deformations from the clamping area 18 to the web 17 and via this to the valve tongue 14 is avoided.
  • the recess 19 is designed as a slit in the form of a segment of a circle, which continues on both sides slightly over the region of the web width.
  • the length 1 of this recess slot is dimensioned such that the deformations of the valve disk 15 resulting from the clamping area 18 cannot propagate to the web or to the valve tongue 14.
  • the same also applies to the position of the recess 19 relative to the web 17, in particular also with regard to the distance to the web 17 and also with respect to the slot width b.
  • the length of the recess slot 19 is preferably approximately five times the web width s.
  • the distance of the recess 19 from the web 17 corresponds approximately to the web width.
  • FIG. 2 also clearly shows that in the region of the recess 19 a small distance between the valve disk 15 and the top plate 9 or the intermediate plate 8 is sufficient. By keeping deformations resulting from material displacements away from the valve tongue 14, these areas remain free of external stresses, which means that short reaction times of the valves with long opening and closing times can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Check Valves (AREA)

Description

Die Erfindung bezieht sich auf eine Pumpe mit vom Fördermedium gesteuerten, im Pumpenkopf untergebrachten Zungen-Ventilen, die in Schließstellung an einer Ventildichtfläche des Pumpenkopfes anliegen sowie in Offenstellung in einer Ausnehmung des Ventilkopfes für die Ventilöffnungsbewegung ausweichen, wobei die Ventile eine oder mehrere Ventilscheiben aus Gummi oder einem gummiartigen Material aufweisen, in der beziehungsweise denen sich durch insbesondere teilringkreisförmige Ausnehmungen umgrenzte Ventilzungen befinden, die über einen Steg gelenkig mit der übrigen Ventilscheibe verbunden sind und wobei jeweils in dem ein Ventil umgrenzenden Bereich die Ventilscheibe zwischen Pumpenkopfteilen eingespannt ist.The invention relates to a pump with the pumped medium controlled tongue valves housed in the pump head in the closed position on a valve sealing surface of the pump head apply as well as in the open position in a recess of the Dodge valve head for valve opening movement, whereby the valves one or more rubber valve disks or have a rubbery material in the or which are characterized in particular by part-ring-shaped recesses bounded valve tongues are located, which are articulated via a web are connected to the rest of the valve disc and in each case in the area surrounding a valve, the valve disc between Pump head parts is clamped.

Eine derartige Pumpe ist aus der DE-U-87 02 221 bekannt. Um bei diesen, als Membranpumpen ausgebildeten Flüssigkeits- und Gaspumpen ein gutes Selbstansaugeverhalten und einen guten volumetrischen Wirkungsgrad zu erzielen, ist es wichtig, daß die Ventile ihre Öffnungs- und Schließbewegung möglichst synchron oder kongruent zu der Membranhub- und Senkbewegung durchführen und somit möglichst lange Öffnungs- und Schließzeiten erreichen. Problematisch ist bei diesen Membranpumpen mit Zungenventilen, daß im Bereich der äußeren Einspannung der Ventilscheibe durch die Pumpenkopfteile eine Druckbeaufschlagung der dazwischen befindlichen Ventilplatte, die aus Gummi oder einem gummiartigen Material besteht, auftritt und daß dies zu einer Materialverdrängung führt. Durch die Nähe der Einspannstelle zu der Ventilzunge beeinflußt das verdrängte Material auch die Ventilzunge, da eine Übertragung über den brückenartigen Verbindungssteg möglich ist.
Diese Materialverdrängung kann zu einer unerwünschten Verformung des Steges und auch der Ventilzunge führen. Aus einer solchen Verformung des Steges beziehungsweise der Ventilzunge resultiert aber eine Beeinträchtigung in dem Sinne, daß die Öffnungs- und Schließbewegung beziehungsweise die Öffnungs- und Schließgeschwindigkeit behindert wird. Es ergibt sich daraus eine Verschlechterung der Ventilreaktionszeit.Such a pump is known from DE-U-87 02 221. In order to achieve good self-priming behavior and good volumetric efficiency with these liquid and gas pumps designed as diaphragm pumps, it is important that the valves perform their opening and closing movements as synchronously or congruently as possible with the diaphragm lifting and lowering movements and thus as long as possible - and reach closing times. The problem with these diaphragm pumps with reed valves is that, in the area of the external clamping of the valve disc by the pump head parts, pressure is applied to the valve plate located therebetween, which is made of rubber or a rubber-like material, and that this leads to material displacement. Due to the proximity of the clamping point to the valve tongue, the displaced material also influences the valve tongue, since transmission via the bridge-like connecting web is possible.
This material displacement can lead to an undesirable deformation of the web and also the valve tongue. Such a deformation of the web or the valve tongue results in an impairment in the sense that the opening and closing movement or the opening and closing speed is impeded. This results in a deterioration in the valve response time.

Aufgabe der vorliegenden Erfindung ist es, eine Pumpe mit Zungenventilen der eingangs erwähnten Art zu schaffen, deren Reaktionszeiten verbessert sind, so daß die Pumpe auch besonders gut für hohe Arbeitsgeschwindigkeiten einsetzbar ist. Dabei soll auch das Selbstansaugverhalten und der volumetrische Wirkungsgrad verbessert sein.The object of the present invention is to use a pump To create tongue valves of the type mentioned, whose Response times are improved so that the pump is also special can be used well for high working speeds. Here should also the self-priming and volumetric Efficiency be improved.

Zur Lösung dieser Aufgabe wird erfindungsgemäß insbesondere vorgeschlagen, daß in einem Verbindungsbereich zwischen Ventilzunge, Steg und äußerer Einspannung, benachbart zu dem Steg, der Ventilzunge abgewandt, wenigstens eine Aussparung oder Unterbrechung der Ventilscheibe vorgesehen ist und daß die Breite der Aussparung in Richtung der Verbindungslinie zwischen Ventilzunge, Steg und äußerer Einspannung zumindest dem Maß einer von der äußeren Einspannung herrührenden Materialverdrängung entspricht.
Vom Einspannbereich herrührende Materialverdrängungen gelangen durch die vorgesehene Aussparung nicht mehr zu dem Steg und über diesen in den Bereich der Ventilzunge. Durch die Unterbrechung beziehungsweise Aussparung ist praktisch ein Pufferraum geschaffen, in den auftretende Materialverdrängungen ausweichen können ohne sich auf der anderen Seite weiter auszuwirken.
Man könnte zwar den Abstand zwischen äußerer Einspannung und der Ventilzunge bzw. dem Steg auch vergrößern, um die Auswirkungen der auftretenden Materialverdrängung zu reduzieren, dies ist aber wegen der beengten Platzverhältnisse im Pumpenkopf praktisch nicht möglich.
Beim Erfindungsgegenstand lassen sich dagegen die Auswirkungen der Materialverdrängung praktisch vollständig von der Ventilzunge fernhalten, wobei dies auch unter den gegebenen, beengten Platzverhältnissen gut möglich ist. Durch die vorgesehene Breite der Aussparung ist genügend Freiraum geschaffen, um vom Einspannen der Ventilscheibe herrührende Materialverschiebungen beziehungsweise Materialverdrängungen in Richtung zu dem Steg und der Ventilzunge fernzuhalten.To solve this problem, the invention proposes, in particular, that at least one recess or interruption of the valve disc is provided in a connection area between the valve tongue, web and external clamping, adjacent to the web, facing away from the valve tongue, and that the width of the recess in the direction of the connecting line between Valve tongue, web and external clamping corresponds at least to the extent of a material displacement resulting from the external clamping.
Material displacements originating from the clamping area no longer reach through the recess provided to the web and via this into the area of the valve tongue. The interruption or recess practically creates a buffer space in which material displacements can escape without having any further effect on the other side.
The distance between the outer clamping and the valve tongue or the web could also be increased in order to reduce the effects of the material displacement that occurs, but this is practically impossible because of the limited space in the pump head.
In the case of the subject matter of the invention, on the other hand, the effects of material displacement can be kept practically completely away from the valve tongue, although this is also possible under the given, restricted space. The intended width of the recess creates enough free space to keep material displacements or material displacements from clamping the valve disk away from the web and the valve tongue.

Vorzugsweise erstreckt sich die in Verlängerung von Ventil zunge und Steg befindliche Aussparung in der Ventilscheibe seitlich und vorzugsweise symmetrisch über die direkte Projektionsverlängerung des Steges hinaus.
Ein seitliches "Umgehen" der Aussparung mit Beeinflussung der Ventilzunge wird dadurch sicher vermieden.Preferably, the recess located in the extension of the valve tongue and web extends laterally and preferably symmetrically in the valve disk over the direct projection extension of the web.
A lateral "bypassing" of the recess with an influence on the valve tongue is thereby avoided.

Zusätzliche Ausgestaltungen der Erfindung sind in den weiteren Unteransprüchen aufgeführt. Nachstehend ist die Erfindung mit ihren wesentlichen Einzelheiten anhand der Zeichnungen noch näher erläutert.Additional embodiments of the invention are in the others Subclaims listed. Below is the invention with their essential details with reference to the drawings explained in more detail.

Es zeigt:

Fig. 1
eine Längsschnittdarstellung einer Membranpumpe mit Zungenventilen,
Fig. 2
eine Detaildarstellung im Bereich eines Ventiles im Längsschnitt und
Fig. 3
eine Teilaufsicht einer Ventilplatte.
It shows:
Fig. 1
2 shows a longitudinal sectional view of a diaphragm pump with tongue valves,
Fig. 2
a detailed view in the region of a valve in longitudinal section and
Fig. 3
a partial supervision of a valve plate.

Eine in Figur 1 gezeigte Membranpumpe 1 weist in einem Kurbelgehäuse 2 einen Kurbeltrieb 3 auf, der über ein Pleuel 4 mit einer Membrane 5 verbunden ist. Der auf der einen Seite von der Membrane 5 begrenzte Pumpraum 6 ist auf der gegenüberliegenden Seite von einer zum Pumpenkopf 7 gehörenden Zwischenplatte 8 begrenzt. An die Zwischenplatte 8 schließt sich eine Kopfplatte 9 an.
Im Pumpenkopf 7 befinden sich ein Einlaßventil 10 sowie ein Auslaßventil 11. Beide Ventile sind als Zungenventile ausgebildet, die in Schließstellung jeweils an Ventildichtflächen 12 anliegen. Gegenüberliegend dieser Ventildichtflächen 12 befinden sich jeweils Ausnehmungen 13, in die die zu den Ventilen gehörenden Ventil zungen 14 bei einer Ventilöffnungsbewegung ausweichen können.
Die Ventile weisen eine vorzugsweise gemeinsame Ventilscheibe 15 auf, in der sich die durch teilringkreisförmige Ausnehmungen 16 (vergleiche Figur 3) umgrenzten Ventilzungen 14 befinden. Die Ventilscheibe 15 ist zwischen der Kopfplatte 9 und der Zwischenplatte 8 des Pumpenkopfes 7 eingespannt. Die Einspannstellen umgrenzen dabei jeweils den Bereich des Einlaßventiles 10 und des Auslaßventiles 11 und dichten diese Bereiche auch gegeneinander ab.A diaphragm pump 1 shown in FIG. 1 has a crank mechanism 3 in a crankcase 2, which is connected to a diaphragm 5 via a connecting rod 4. The pump chamber 6 delimited on one side by the membrane 5 is delimited on the opposite side by an intermediate plate 8 belonging to the pump head 7. A head plate 9 connects to the intermediate plate 8.
An inlet valve 10 and an outlet valve 11 are located in the pump head 7. Both valves are designed as tongue valves which each rest on valve sealing surfaces 12 in the closed position. Opposite these valve sealing surfaces 12 there are recesses 13 into which the valve tongues 14 belonging to the valves can dodge during a valve opening movement.
The valves have a preferably common valve disk 15, in which the valve tongues 14 are located, which are delimited by annular recesses 16 (see FIG. 3). The valve disc 15 is clamped between the head plate 9 and the intermediate plate 8 of the pump head 7. The clamping points each delimit the area of the inlet valve 10 and the outlet valve 11 and also seal these areas from one another.

Wie gut in den Figuren 2 und 3 erkennbar, befindet sich zwischen den gegenüberliegenden Enden der die Ventilzungen 14 umgrenzende, teilringkreisförmige Ausnehmung 16 ein Steg 17, an dem die Ventilzunge 14 beweglich gehalten und mit der übrigen Ventilscheibe 15 verbunden ist.
Wie bereits vorerwähnt, ist die Ventilscheibe 15 in dem in Figur 3 strichliniert umgrenzten Bereich zwischen der Kopfplatte 9 und der Zwischenplatte 8 (vergleiche auch Figur 2) eingespannt. Durch diese Einspannung wird zwangsläufig das dazwischen befindliche Material der elastischen Ventilscheibe 15 etwas verdrängt. Gelangen die Auswirkungen einer solchen Materialverdrängung in den Bereich des brückenartigen Steges 17 beziehungsweise auch bis in den Bereich der Ventilzunge 14, so kann dadurch eine entsprechende Verformung erfolgen. Eine solche Verformung kann zur Folge haben, daß sich die Biegestabilität im Bereich der Ventilzunge und/oder des Steges 17 unkontrolliert verändert, so daß dadurch der vorgesehene Bewegungsablauf beim Öffnen und Schließen der Ventilzunge 14 nicht mehr in erwünschtem Maße gewährleistet ist.
Um nun zu verhindern, daß solche Einspann-Verformungen in den Bereich der Ventilzunge 14 und auch in den Bereich des Steges 17 gelangen, ist zwischen dem dem Steg 17 benachbarten Einspannbereich 18 und dem Steg 17 eine Aussparung 19 in der Ventilscheibe 15 vorgesehen. Diese Aussparung 19 bildet in dem Verbindungsbereich zwischen dem Steg 17 und dem Einspannbereich 18 eine Unterbrechung und einen Pufferbereich, durch den eine Übertragung von Materialverformungen aus dem Einspannbereich 18 auf den Steg 17 und über diesen auf die Ventilzunge 14 vermieden wird.
Im Ausführungsbeispiel ist die Aussparung 19 als kreisabschnittförmiger Schlitz ausgebildet, der sich beidseitig etwas über den Bereich der Stegbreite fortsetzt. Die Länge 1 dieses Aussparungs-Schlitzes ist dabei so bemessen, daß sich die aus dem Einspannbereich 18 ergebenden Verformungen der Ventilscheibe 15 nicht bis zum Steg beziehungsweise zur Ventilzunge 14 fortpflanzen können. Gleiches gilt auch für die Lage der Aussparung 19 relativ zu dem Steg 17, insbesondere auch bezüglich des Abstandes zum Steg 17 und auch bezüglich der Schlitzbreite b. Bevorzugt beträgt die Länge des Aussparungs-Schlitzes 19 etwa dem Fünffachen der Stegbreite s. Der Abstand der Aussparung 19 vom Steg 17 entspricht etwa der Stegbreite. Die gezeigte kreisabschnittförmige Ausbildung der schlitzförmigen Aussparung 19 ist besonders günstig bei den vorhandenen Platzverhältnissen.
Figur 2 läßt noch gut erkennen, daß im Bereich der Aussparung 19 ein geringer Abstand der Ventilscheibe 15 jeweils zu der Kopfplatte 9 beziehungsweise der Zwischenplatte 8 genügt.
Durch das Fernhalten von aus Materialverdrängungen herrührenden Verformungen von der Ventilzunge 14 bleiben diese Bereiche frei von äußeren Spannungen, wodurch sich kurze Reaktionszeiten der Ventile mit langen Öffnungs- und Schließzeiten realisieren lassen.As can be clearly seen in FIGS. 2 and 3, there is a web 17 between the opposite ends of the partially annular recess 16 which delimits the valve tongues 14 and on which the valve tongue 14 is movably held and connected to the remaining valve disk 15.
As already mentioned, the valve disc 15 is clamped in the area delimited in FIG. 3 between the top plate 9 and the intermediate plate 8 (see also FIG. 2). This clamping inevitably displaces the material of the elastic valve disk 15 located in between. If the effects of such a material displacement reach the area of the bridge-like web 17 or even the area of the valve tongue 14, this can result in a corresponding deformation. Such a deformation can have the consequence that the bending stability in the region of the valve tongue and / or of the web 17 changes in an uncontrolled manner, so that the intended sequence of movements when opening and closing the valve tongue 14 is no longer guaranteed to the desired extent.
In order to prevent such clamping deformations from reaching the area of the valve tongue 14 and also the area of the web 17, a recess 19 is provided in the valve disc 15 between the clamping area 18 adjacent to the web 17 and the web 17. This recess 19 forms an interruption and a buffer area in the connection area between the web 17 and the clamping area 18, by means of which a transfer of material deformations from the clamping area 18 to the web 17 and via this to the valve tongue 14 is avoided.
In the exemplary embodiment, the recess 19 is designed as a slit in the form of a segment of a circle, which continues on both sides slightly over the region of the web width. The length 1 of this recess slot is dimensioned such that the deformations of the valve disk 15 resulting from the clamping area 18 cannot propagate to the web or to the valve tongue 14. The same also applies to the position of the recess 19 relative to the web 17, in particular also with regard to the distance to the web 17 and also with respect to the slot width b. The length of the recess slot 19 is preferably approximately five times the web width s. The distance of the recess 19 from the web 17 corresponds approximately to the web width. The circular section-shaped design of the slot-shaped recess 19 shown is particularly favorable given the available space.
FIG. 2 also clearly shows that in the region of the recess 19 a small distance between the valve disk 15 and the top plate 9 or the intermediate plate 8 is sufficient.
By keeping deformations resulting from material displacements away from the valve tongue 14, these areas remain free of external stresses, which means that short reaction times of the valves with long opening and closing times can be achieved.

Claims (5)

  1. A pump with flow medium-controlled tongue valves accommodated in the pump head, which in the closed position lie on a valve sealing surface of the pump head and in the open position withdraw into a recess of the valve head for the valve opening movement, wherein the valves have one or more valve discs which are made of rubber or a rubber-like material and in which are located valve tongues circumscribed and particularly partly encircled by ring-shaped recesses, which tongues are flexibly connected to the remaining valve disc by a web or the like, and wherein in each case the valve disc is clamped between pump head elements in the area circumscribing a valve, characterized in that at least one opening (19) or break is provided in the valve disc (15), opposite the valve tongue (14) and adjacent to the web (17), in the connecting region between valve tongue (14), web (17) and outer clamp (18), and that the width (b) of the opening (19) in the direction of the connecting line between valve tongue, web and outer clamp corresponds at least to the measure of material displacement arising from the outer clamp.
  2. A pump as claimed in claim 1, characterized in that the opening (19) in the valve disc (15), located in extension of the valve tongue (14) and web (17), extends laterally and preferably symmetrically out past the direct projection extension of the web.
  3. A pump as claimed in claim 1 or claim 2, characterized in that the opening (19) is formed as a slit which is preferably arranged in the shape of a segment of a circle in spaced relationship to the web and concentrically to the valve tongue (14).
  4. A pump as claimed in any one of claims 1 to 3, characterized in that the opening (19) extends in its length (1) over an area corresponding to about two to about eight times, preferably five times the web width (s).
  5. A pump as claimed in any one of claims 1 to 4, characterized in that the distance of the opening (19) from the web (17) corresponds to about 0.5 to 2 times the web width (s).
EP95916624A 1994-04-13 1995-04-11 Pump Expired - Lifetime EP0755486B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4412668A DE4412668C2 (en) 1994-04-13 1994-04-13 pump
DE4412668 1994-04-13
PCT/EP1995/001317 WO1995028569A1 (en) 1994-04-13 1995-04-11 Pump

Publications (2)

Publication Number Publication Date
EP0755486A1 EP0755486A1 (en) 1997-01-29
EP0755486B1 true EP0755486B1 (en) 1998-02-25

Family

ID=6515254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95916624A Expired - Lifetime EP0755486B1 (en) 1994-04-13 1995-04-11 Pump

Country Status (5)

Country Link
US (1) US5785508A (en)
EP (1) EP0755486B1 (en)
JP (1) JP3621702B2 (en)
DE (2) DE4412668C2 (en)
WO (1) WO1995028569A1 (en)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980079426A (en) * 1997-03-25 1998-11-25 마사히로 오케사쿠 Plunger Pump for Waterjet Room
US5884665A (en) * 1998-05-19 1999-03-23 General Motors Corporation Air conditioning reed valve support seat
US7029238B1 (en) * 1998-11-23 2006-04-18 Mykrolis Corporation Pump controller for precision pumping apparatus
US8172546B2 (en) 1998-11-23 2012-05-08 Entegris, Inc. System and method for correcting for pressure variations using a motor
DE19919908B4 (en) * 1999-04-30 2004-09-23 Asf Thomas Industries Gmbh Diaphragm pump with an inlet opening controlled by the diaphragm
US6325932B1 (en) * 1999-11-30 2001-12-04 Mykrolis Corporation Apparatus and method for pumping high viscosity fluid
US6558137B2 (en) 2000-12-01 2003-05-06 Tecumseh Products Company Reciprocating piston compressor having improved noise attenuation
EP2112377B1 (en) * 2001-11-06 2014-03-12 Oken Seiko Co., Ltd. Diaphragm pump
GB0224986D0 (en) 2002-10-28 2002-12-04 Smith & Nephew Apparatus
US7762796B2 (en) * 2003-07-23 2010-07-27 Hargraves Technology Corporation Pump valve with controlled stroke
US7753894B2 (en) 2004-04-27 2010-07-13 Smith & Nephew Plc Wound cleansing apparatus with stress
CN101155992B (en) 2004-11-23 2013-02-20 恩特格里公司 System and method for a variable home position dispense system
US8087429B2 (en) * 2005-11-21 2012-01-03 Entegris, Inc. System and method for a pump with reduced form factor
US8753097B2 (en) 2005-11-21 2014-06-17 Entegris, Inc. Method and system for high viscosity pump
WO2007067342A2 (en) 2005-12-02 2007-06-14 Entegris, Inc. System and method for valve sequencing in a pump
US7850431B2 (en) * 2005-12-02 2010-12-14 Entegris, Inc. System and method for control of fluid pressure
US7878765B2 (en) * 2005-12-02 2011-02-01 Entegris, Inc. System and method for monitoring operation of a pump
JP5302002B2 (en) * 2005-12-02 2013-10-02 インテグリス・インコーポレーテッド Low-profile mounting parts and mounting part assemblies without O-rings
CN101356372B (en) 2005-12-02 2012-07-04 恩特格里公司 System and method for pressure compensation in a pump
US8083498B2 (en) 2005-12-02 2011-12-27 Entegris, Inc. System and method for position control of a mechanical piston in a pump
JP4845969B2 (en) 2005-12-02 2011-12-28 エンテグリース，インコーポレイテッド I / O system, method, and apparatus for coupling pump controller
JP5345853B2 (en) 2005-12-05 2013-11-20 インテグリス・インコーポレーテッド Error volume system and method for pumps
TWI402423B (en) 2006-02-28 2013-07-21 Entegris Inc System and method for operation of a pump
US7684446B2 (en) * 2006-03-01 2010-03-23 Entegris, Inc. System and method for multiplexing setpoints
US7494265B2 (en) * 2006-03-01 2009-02-24 Entegris, Inc. System and method for controlled mixing of fluids via temperature
US8187227B2 (en) * 2006-11-01 2012-05-29 Medela Holding Ag Self returning contamination barrier
DE102007005736A1 (en) * 2007-01-31 2008-08-14 Gardner Denver Thomas Gmbh Displacement pump for delivering a fluid with automatic adjustment to the compressibility of this fluid
CN101377192B (en) * 2007-08-30 2012-06-13 研能科技股份有限公司 Fluid delivery device
EP3000448B2 (en) 2007-11-21 2022-03-09 Smith & Nephew PLC Wound dressing
GB0723855D0 (en) 2007-12-06 2008-01-16 Smith & Nephew Apparatus and method for wound volume measurement
CN101463808B (en) * 2007-12-21 2010-12-08 研能科技股份有限公司 Fluid delivery device
CH702436A1 (en) * 2009-12-23 2011-06-30 Jean-Denis Rochat DOSING PUMP FOR MEDICAL USE.
DE102010038873A1 (en) * 2010-08-04 2012-02-09 Gardner Denver Thomas Gmbh pump
GB201015656D0 (en) 2010-09-20 2010-10-27 Smith & Nephew Pressure control apparatus
US20140193279A1 (en) * 2011-01-11 2014-07-10 Panasonic Corporation Valve device of compressor, and sealed compressor including valve device
US9084845B2 (en) 2011-11-02 2015-07-21 Smith & Nephew Plc Reduced pressure therapy apparatuses and methods of using same
JP6276251B2 (en) 2012-03-20 2018-02-07 スミス アンド ネフュー ピーエルシーＳｍｉｔｈ ＆ Ｎｅｐｈｅｗ Ｐｕｂｌｉｃ Ｌｉｍｉｔｅｄ Ｃｏｍｐａｎｙ Operation control of decompression therapy system based on dynamic determination of duty cycle threshold
US9427505B2 (en) 2012-05-15 2016-08-30 Smith & Nephew Plc Negative pressure wound therapy apparatus
US10208740B2 (en) * 2012-09-04 2019-02-19 Carrier Corporation Reciprocating refrigeration compressor suction valve seating
CN104314794B (en) * 2014-10-20 2017-05-17 芜湖欧宝机电有限公司 High-efficiency valve block for refrigerator or freezer compressor
JP6725529B2 (en) 2014-12-22 2020-07-22 スミス アンド ネフュー ピーエルシーＳｍｉｔｈ ＆ Ｎｅｐｈｅｗ Ｐｕｂｌｉｃ Ｌｉｍｉｔｅｄ Ｃｏｍｐａｎｙ Device and method for negative pressure wound therapy
JP6733420B2 (en) 2016-08-23 2020-07-29 セイコーエプソン株式会社 Check valve, diaphragm pump, and printing device
WO2019169187A1 (en) * 2018-02-28 2019-09-06 Treau, Inc. Roll diaphragm compressor and low-pressure vapor compression cycles

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1058798B (en) * 1958-04-05 1959-06-04 Bosch Gmbh Robert Automatic valve, primarily for compressors, especially for refrigeration machines
AT280326B (en) * 1967-07-01 1970-04-10 Bosch Hausgeraete Gmbh Cylinder cover with flow channels controlled by tongue valves
US3514231A (en) * 1967-12-01 1970-05-26 Perry Belden Reciprocating pump for marine toilets
DE2162031A1 (en) * 1971-12-10 1973-06-14 Auergesellschaft Gmbh DIAPHRAGM PUMP
DE2802900A1 (en) * 1978-01-24 1979-07-26 Erich Becker Diaphragm pump with reciprocating crank actuator - has pressure die cast cylinder head with integrally formed valve and diaphragm seats
AT364249B (en) * 1979-11-02 1981-10-12 Hoerbiger Ventilwerke Ag PRESSURE VALVE FOR RADIAL AND AXIAL PISTON PUMPS
JPS57181981A (en) * 1981-04-30 1982-11-09 Hitachi Ltd Valve structure of closed type electric motor-driven compressor
US4573888A (en) * 1983-09-09 1986-03-04 Aspen Laboratories, Inc. Fluid pump
JPS6332174A (en) * 1986-07-24 1988-02-10 Inoue Japax Res Inc Reciprocating pump
DE8702221U1 (en) 1987-02-13 1987-04-09 Becker, Erich, 7812 Bad Krozingen Pump with valves controlled by the pumped medium
DE8901872U1 (en) * 1989-02-17 1990-06-21 KNF Neuberger GmbH, 7800 Freiburg Pump with valve plate

Also Published As

Publication number Publication date
JP3621702B2 (en) 2005-02-16
DE4412668A1 (en) 1995-10-19
US5785508A (en) 1998-07-28
EP0755486A1 (en) 1997-01-29
DE4412668C2 (en) 1998-12-03
DE59501502D1 (en) 1998-04-02
WO1995028569A1 (en) 1995-10-26
JPH09512077A (en) 1997-12-02

Similar Documents

Publication Publication Date Title
EP0755486B1 (en) Pump
DE69409131T2 (en) SELF-ALIGNING PISTON
DE69615212T2 (en) REED VALVE
DE2455329B2 (en) Diaphragm valve
EP0622600A1 (en) Flat plate oil cooler assembly
DE2735971A1 (en) CONTROL VALVE
DE4118652C2 (en) Pump, preferably diaphragm pump
EP0676573B1 (en) Directional valve with a base-plate
DE1802178B2 (en) POETRY
DE2311720C2 (en) Piston compressor valve
DE69212220T2 (en) Thermally controlled steam trap
EP0152938A2 (en) Seal for a piston or piston rod
DE60120255T2 (en) Hygienic sealing plate for a valve assembly
DE2357905A1 (en) REED VALVE, IN PARTICULAR FOR COMPRESSORS
EP1231996B1 (en) Press membrane from a rubber-elastic material
DE19716122A1 (en) Oil pump cavitation relief
DE2755735A1 (en) Valve assembly for reciprocating gas compressor - has valve discs positioned between upper and lower plates with recesses for seats
DE3023928A1 (en) Automatic valve for vacuum pump - has flexible disc held down on diameter and bending open on either side of diameter
DE3108273A1 (en) Valve unit, in particular for piston compressors or the like
DE69506148T2 (en) Suspension leg
AT295017B (en) Round shaped direct current valve
DE665465C (en) Gate valve for shutting off inlet and outlet channels
DE68903307T2 (en) RAMME FOR SWIVEL ROLLER GEARBOX.
CH107554A (en) Segment contactor for pressurized water tunnels.
DE324819C (en) Flap valve

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19961025

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB LI

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19970527

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: HANS RUDOLF GACHNANG PATENTANWALT

Ref country code: CH

Ref legal event code: EP

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980226

REF Corresponds to:

Ref document number: 59501502

Country of ref document: DE

Date of ref document: 19980402

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: GACHNANG AG PATENTANWAELTE, CH

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20140122

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20140416

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20140423

Year of fee payment: 20

Ref country code: CH

Payment date: 20140428

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59501502

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20150410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20150410