EP0332100B1 - Deaerator for a liquid-pump - Google Patents
Deaerator for a liquid-pump Download PDFInfo
- Publication number
- EP0332100B1 EP0332100B1 EP89103877A EP89103877A EP0332100B1 EP 0332100 B1 EP0332100 B1 EP 0332100B1 EP 89103877 A EP89103877 A EP 89103877A EP 89103877 A EP89103877 A EP 89103877A EP 0332100 B1 EP0332100 B1 EP 0332100B1
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- European Patent Office
- Prior art keywords
- throttle
- venting device
- bore
- screw element
- pump head
- Prior art date
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- Expired - Lifetime
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- 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
- F04B53/06—Venting
Definitions
- the invention relates to a ventilation device for a liquid pump working with a pressure and suction stroke, in particular a diaphragm metering pump, the pump chamber of which is limited by a pump head housing that accommodates suction and pressure valves, a ventilation channel extending from an upper space of the pump chamber to an outlet opening and in parallel connection has a switching valve for quick ventilation and an adjustable throttle for permanent ventilation and wherein the switching valve has a valve seat and a closure piece formed on a first screw element and the throttle has a throttle seat and a throttle element formed on a second screw element.
- a venting device for a diaphragm metering pump is known (DE-U 82 02 361), which has only one valve.
- the valve closure piece of the valve is screwed into a threaded bore of a sleeve having the valve seat, which in turn is screwed in a statically sealed manner into a threaded bore in the pump head housing which is connected to the pump chamber.
- the sleeve and the pump head housing do not form a valve, since the pump head housing has no valve seat.
- the valve closure piece in the sleeve the valve can either be opened only slightly with a throttling function for permanent ventilation or wide open for quick ventilation. After the rough adjustment for quick ventilation, another fine adjustment for permanent ventilation must be made. This is time consuming and labor intensive.
- the invention has for its object to provide a ventilation device of the type described above, which takes up less space and can be manufactured cheaper.
- This object is achieved in that the switching valve is arranged in the pump head housing and the throttle in the first screw element.
- valve seat is formed in the pump head housing and the first screw element is screwed into a threaded bore of the pump head housing and that the second screw element is screwed into a longitudinal bore of the first screw element in which the throttle seat is formed near the end on the closure side.
- first screw element prefferably surrounded by an annular space following the closure piece and for the longitudinal bore to be connected to the annular space, preferably via at least one radial bore. Since the throttle seat is arranged concentrically to the valve seat, this results in the desired parallel connection with the simplest of means.
- a threaded bore extends from the free end face of the pump head housing and ends with a bore section extending beyond the valve seat in a housing bore receiving the pressure valve. This results in simple machining of the pump head housing.
- a transverse bore in the pump head housing leading to the outlet opening preferably adjoins the circumference of the threaded bore. This transverse bore can also be produced without difficulty when machining the pump head housing.
- the cross hole can lead to an outlet opening located below the threaded hole.
- the liquid discharged with the gas can then drain into a collecting container.
- transverse bore leads to an outlet opening located on the top of the pump head housing. Gas then exits immediately upwards. Clogging due to stagnant liquid that crystallizes, for example, is not possible.
- valve seat can be conical and the closure piece can have an O-ring arranged in a circumferential groove. This results in a tight seal with simple manufacture.
- valve seat surface need only deviate from the cross-sectional plane to such an extent that the O-ring can rest against it.
- the cone angle should be greater than 100 °. A relatively small rotation of the first screw element is therefore sufficient to expose a sufficient valve cross section for the quick ventilation.
- the throttle seat is conical and the throttle element has the same conicity.
- a cone gap results which can be set very precisely in order to determine the desired throttle resistance.
- the smallest possible cone angles are recommended, preferably those of less than 60 °. This leads to a particularly good fine adjustment.
- a cylindrical pin can be connected to the conical throttle element, which extends through the central opening of the throttle seat in order to remove crystalline deposits.
- Fig. 1 shows the end part of a liquid pump 1.
- a membrane 5 is clamped, which is moved back and forth via a piston rod, not shown, which is connected to a connection 6. It is driven, for example, by an electromagnet.
- a pump chamber 7 is formed between the pump head housing 3 and the membrane 5. When the membrane is actuated, the volume of this pump chamber 7 increases and decreases.
- a suction valve insert 9 provided with a suction line connection 8 and having two individual suction valves 10 and 11 is screwed into the housing 3 from below.
- a pressure valve insert 13 provided with a pressure line connection 12 and having two pressure valves 14 and 15 connected in series is screwed into the housing 3 from above.
- the switching valve 17 is formed by a conical valve seat 19 with a cone angle of 120 ° and a closure piece 20 which is attached to the end face of a screw element 21.
- the closure piece 20 has an O-ring inserted into a circumferential groove.
- the screw element 21 is screwed into a threaded bore 22 of the housing 3 and sealed with the help of an O-ring 23.
- the threaded bore 22 opens with a section 24 in a housing bore 25, which serves to receive the pressure valve insert 13, at a location between the first pressure valve 14 and the second pressure valve 15.
- an annular space 27 is provided between the thread 26 of the screw element 21 and the closure piece 20 is outside of the screw element 21. This is connected via the end section 28 of a transverse bore 29 to an outlet opening 30.
- a nozzle 31 is inserted into this outlet opening, via which liquid or gas can be discharged.
- a longitudinal bore 32 is provided in the screw element 21, into which a second screw element 33 is screwed and sealed by means of an O-ring 34.
- a conical throttle seat 35 interacts with a conical throttle element 36 of the same conicity, so that a conical throttle gap can be set between the two.
- the cone angle is 30 °.
- a cylindrical pin 37 axially adjoining the conical throttle element 36 projects through the central opening of the throttle seat 35 in order to remove crystalline deposits from the central opening.
- Radial bores 38 connect the longitudinal bore 32 to the annular space 27. The switching valve 17 and throttle 18 are therefore connected in parallel.
- the screw element 21 is screwed on by half or a full turn. This results in a sufficiently large switching valve cross section to quickly remove air or gas from the pump chamber 7.
- the throttle 18 can be closed, as shown in FIG. 1.
- the position according to FIG. 2 applies to permanent ventilation.
- the switching valve 17 is closed and the throttle 18 is opened so far by turning the screw element 33 that gas can escape, but liquid cannot escape or cannot escape to any appreciable extent. It is advantageous here that when the switching valve 17 is repeatedly opened and closed by turning the screw element 33, the same throttle setting for the permanent ventilation can always be maintained.
- FIGS. 1 and 2 essentially the same parts as in FIGS. 1 and 2 are used. The only difference is that the annular space 27 in the pump head housing 103 is connected via a transverse channel 129 arranged at the top to an outlet opening 130 at the top, into which a connecting piece 131 is inserted.
- the screw element 21 can be inserted into the housing 3 in such a way that the annular space 27 is connected to the pump chamber 7 and the bore 24 leads to the outlet opening.
- the threads of the two screw elements can be different; for example, the screw element 21 has a coarser thread and the screw element 33 has a finer thread.
Abstract
Description
Die Erfindung bezieht sich auf eine Entlüftungsvorrichtung für eine mit Druck- und Saughub arbeitende Flüssigkeitspumpe, insbesondere Membran-Dosierpumpe, deren Pumpkammer durch ein Saug- und Druckventile aufnehmendes Pumpenkopfgehäuse begrenzt ist, wobei sich ein Entlüftungskanal von einem oberen Raum der Pumpkammer zu einer Austrittsöffnung erstreckt und in Parallelschaltung ein Schaltventil zur Schnellentlüftung und eine einstellbare Drossel zur Dauerentlüftung aufweist und wobei das Schaltventil einen Ventilsitz und ein an einem ersten Schraubelement ausgebildetes Verschlußstück und die Drossel einen Drosselsitz und ein an einem zweiten Schraubelement ausgebildetes Drosselelement aufweist.The invention relates to a ventilation device for a liquid pump working with a pressure and suction stroke, in particular a diaphragm metering pump, the pump chamber of which is limited by a pump head housing that accommodates suction and pressure valves, a ventilation channel extending from an upper space of the pump chamber to an outlet opening and in parallel connection has a switching valve for quick ventilation and an adjustable throttle for permanent ventilation and wherein the switching valve has a valve seat and a closure piece formed on a first screw element and the throttle has a throttle seat and a throttle element formed on a second screw element.
Bei einer bekannten Entlüftungsvorrichtung dieser Art (DE-B 28 03 470) sind das Schaltventil und die Drossel axial nebeneinander in einem Anbaugehäuse untergebracht, das an die freie Stirnseite des die Pumpkammer begrenzenden und Saug- und Druckventile aufnehmenden Pumpenkopfgehäuses angesetzt ist. Dies führt zu einer platzaufwendigen Konstruktion. Außerdem müssen Befestigungsmittel zum Anbringen des Anbaugehäuses am eigentlichen Pumpenkopfgehäuse vorgesehen werden.In a known ventilation device of this type (DE-B 28 03 470), the switching valve and the throttle are accommodated axially next to one another in an attachment housing which is attached to the free end face of the pump head housing which delimits the pump chamber and accommodates suction and pressure valves. This leads to a space-consuming construction. In addition, fasteners for attaching the attachment housing to the actual pump head housing must be provided.
Ferner ist eine Entlüftungsvorrichtung für eine Membran-Dosierpumpe bekannt (DE-U 82 02 361), die nur ein Ventil aufweist. Das Ventilverschlußstück des Ventils ist in eine den Ventilsitz aufweisende Gewindebohrung einer Hülse eingeschraubt, die ihrerseits statisch abgedichtet in eine mit der Pumpkammer in Verbindung stehende Gewindebohrung im Pumpenkopfgehäuse fest eingeschraubt ist. Hierbei bilden die Hülse und das Pumpenkopfgehäuse kein Ventil, da das Pumpenkopfgehäuse keinen Ventilsitz aufweist. Durch Verstellen des Ventilverschlußstücks in der Hülse kann das Ventil entweder nur geringfügig mit Drosselfunktion zur Dauerentlüftung oder weit zur Schnellentlüftung geöffnet werden. Nach der Grobeinstellung zur Schnellentlüftung muß eine erneute Feineinstellung zur Dauerentlüftung vorgenommen werden. Dies ist zeit- und arbeitsaufwendig.Furthermore, a venting device for a diaphragm metering pump is known (DE-U 82 02 361), which has only one valve. The valve closure piece of the valve is screwed into a threaded bore of a sleeve having the valve seat, which in turn is screwed in a statically sealed manner into a threaded bore in the pump head housing which is connected to the pump chamber. Here, the sleeve and the pump head housing do not form a valve, since the pump head housing has no valve seat. By adjusting the valve closure piece in the sleeve, the valve can either be opened only slightly with a throttling function for permanent ventilation or wide open for quick ventilation. After the rough adjustment for quick ventilation, another fine adjustment for permanent ventilation must be made. This is time consuming and labor intensive.
Der Erfindung liegt die Aufgabe zugrunde, eine Entlüftungsvorrichtung der eingangs beschriebenen Art anzugeben, die einen geringeren Platzbedarf hat und billiger hergestellt werden kann.The invention has for its object to provide a ventilation device of the type described above, which takes up less space and can be manufactured cheaper.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Schaltventil im Pumpenkopfgehäuse und die Drossel im ersten Schraubelement angeordnet ist.This object is achieved in that the switching valve is arranged in the pump head housing and the throttle in the first screw element.
Dies führt zu einer gedrungenen Bauform, bei der Schaltventil und Drossel unmittelbar im einteiligen Pumpenkopfgehäuse untergebracht sind. Da die Drossel im Schraubelement des Schaltventils angeordnet ist, braucht lediglich dessen Schraubelement in das Pumpenkopfgehäuse eingesetzt zu werden. Dies ergibt einen geringen Materialaufwand, eine rasche Montage und daher eine billige Herstellung. Unabhängig von einer Betätigung des Schaltventils kann dennoch die Drosseleinstellung beibehalten werden.This leads to a compact design, in which the switching valve and throttle are housed directly in the one-piece pump head housing. Since the throttle is arranged in the screw element of the switching valve, only its screw element needs to be inserted into the pump head housing. This results in a low cost of materials, quick assembly and therefore cheap manufacture. Regardless of actuation of the switching valve, the throttle setting can still be maintained.
Bei einer bevorzugten Ausführungsform ist dafür gesorgt, daß der Ventilsitz im Pumpenkopfgehäuse ausgebildet und das erste Schraubelement in eine Gewindebohrung des Pumpenkopfgehäuses eingeschraubt ist und daß das zweite Schraubelement in eine Längsbohrung des ersten Schraubelements eingeschraubt ist, in welchem nahe dem verschlußseitigen Ende der Drosselsitz ausgebildet ist. Dies führt zu einer besonders gedrungenen Bauform.In a preferred embodiment it is ensured that the valve seat is formed in the pump head housing and the first screw element is screwed into a threaded bore of the pump head housing and that the second screw element is screwed into a longitudinal bore of the first screw element in which the throttle seat is formed near the end on the closure side. This leads to a particularly compact design.
Günstig ist es, daß das erste Schraubelement im Anschluß an das Verschlußstück von einem Ringraum umgeben und die Längsbohrung, vorzugsweise über mindestens eine Radialbohrung, mit dem Ringraum verbunden ist. Da der Drosselsitz konzentrisch zum Ventilsitz angeordnet ist, ergibt sich auf diese Weise die gewünschte Parallelschaltung mit einfachsten Mitteln.It is expedient for the first screw element to be surrounded by an annular space following the closure piece and for the longitudinal bore to be connected to the annular space, preferably via at least one radial bore. Since the throttle seat is arranged concentrically to the valve seat, this results in the desired parallel connection with the simplest of means.
Mit Vorteil ist dafür gesorgt, daß eine Gewindebohrung von der freien Stirnseite des Pumpenkopfgehäuses ausgeht und mit einem über den Ventilsitz hinausgehenden Bohrungsabschnitt in einer das Druckventil aufnehmenden Gehäusebohrung mündet. Dies ergibt eine einfache Bearbeitung des Pumpenkopfgehäuses.It is advantageously ensured that a threaded bore extends from the free end face of the pump head housing and ends with a bore section extending beyond the valve seat in a housing bore receiving the pressure valve. This results in simple machining of the pump head housing.
Vorzugsweise schließt an dem Umfang der Gewindebohrung eine zur Austrittsöffnung führende Querbohrung im Pumpenkopfgehäuse an. Auch diese Querbohrung läßt sich ohne Schwierigkeiten bei der Bearbeitung des Pumpenkopfgehäuses erzeugen.A transverse bore in the pump head housing leading to the outlet opening preferably adjoins the circumference of the threaded bore. This transverse bore can also be produced without difficulty when machining the pump head housing.
Die Querbohrung kann zu einer unterhalb der Gewindebohrung befindlichen Austrittsöffnung führen. Dann kann die mit dem Gas abgeführte Flüssigkeit in einen Auffangbehälter ablaufen.The cross hole can lead to an outlet opening located below the threaded hole. The liquid discharged with the gas can then drain into a collecting container.
Eine andere Alternative sieht vor, daß die Querbohrung zu einer an der Oberseite des Pumpenkopfgehäuses befindlichen Austrittsöffnung führt. Gas tritt dann unmittelbar nach oben aus. Eine Verstopfung durch stagnierende Flüssigkeit, die beispielsweise auskristalliesiert, ist nicht möglich.Another alternative provides that the transverse bore leads to an outlet opening located on the top of the pump head housing. Gas then exits immediately upwards. Clogging due to stagnant liquid that crystallizes, for example, is not possible.
Des weiteren kann der Ventilsitz konisch ausgebildet sein und das Verschlußstück einen in einer Umfangsnut angeordneten O-Ring aufweisen. Dies ergibt bei einfacher Herstellung einen dichten Abschluß. Die Ventilsitzfläche braucht aber nur so weit von der Querschnittsebene abzuweichen, daß der O-Ring an ihr anliegen kann.Furthermore, the valve seat can be conical and the closure piece can have an O-ring arranged in a circumferential groove. This results in a tight seal with simple manufacture. However, the valve seat surface need only deviate from the cross-sectional plane to such an extent that the O-ring can rest against it.
Insbesondere sollte der Konuswinkel größer als 100° sein. Es genügt daher eine verhältnismäßig kleine Drehung des ersten Schraubelements, um einen ausreichenden Ventilquerschnitt für die Schnellentlüftung freizulegen.In particular, the cone angle should be greater than 100 °. A relatively small rotation of the first screw element is therefore sufficient to expose a sufficient valve cross section for the quick ventilation.
Des weiteren ist es günstig, daß der Drosselsitz konisch ausgebildet ist und das Drosselelement die gleiche Konizität besitzt. Infolge der gleichen Konizität ergibt sich ein Konusspalt, der sich sehr genau einstellen läßt, um den gewünschten Drosselwiderstand festzulegen.Furthermore, it is favorable that the throttle seat is conical and the throttle element has the same conicity. As a result of the same conicity, a cone gap results which can be set very precisely in order to determine the desired throttle resistance.
Hierbei empfehlen sich möglichst kleine Konuswinkel, vorzugsweise solche von weniger als 60°. Dies führt zu einer besonders guten Feineinstellung.The smallest possible cone angles are recommended, preferably those of less than 60 °. This leads to a particularly good fine adjustment.
An das konische Drosselelement kann ein Zylinderzapfen anschließen, der durch die Mittelöffnung des Drosselsitzes greift, um kristalline Ablagerungen zu entfernen.A cylindrical pin can be connected to the conical throttle element, which extends through the central opening of the throttle seat in order to remove crystalline deposits.
Die Erfindung wird nachstehend anhand in der Zeichnung dargestellter, bevorzugter Ausführungsbeispiele näher erläutert. Es zeigen:
- Fig. 1 eine perspektivische Schnittansicht eines Pumpenkopfes mit erfindungsgemäßer Entlüftungsvorrichtung in geschlossenem Zustand,
- Fig. 2 einen Ausschnitt der Fig. 1 bei geöffneter Drossel der Entlüftungsvorrichtung und
- Fig. 3 in einem Teillängsschnitt eine abgewandelte Ausführungsform.
- 1 is a perspective sectional view of a pump head with a venting device according to the invention in the closed state,
- Fig. 2 shows a detail of Fig. 1 with the throttle of the venting device open and
- Fig. 3 in a partial longitudinal section a modified embodiment.
Fig. 1 stellt den Endteil einer Flüssigkeitspumpe 1 dar. Zwischen einem Pumpengehäuse 2 und dem einstückigen Gehäuse 3 eines Pumpenkopfes 4 ist eine Membran 5 eingespannt, die über eine nicht dargestellte Kolbenstange, die mit einem Anschluß 6 verbunden ist, hin- und herbewegt wird. Der Antrieb erfolgt beispielsweise durch einen Elektromagneten.Fig. 1 shows the end part of a
Eine Pumpkammer 7 wird zwischen dem Pumpenkopfgehäuse 3 und der Membran 5 gebildet. Bei einer Betätigung der Membran vergrößert und verkleinert sich das Volumen dieser Pumpkammer 7. Ein mit einem Saugleitungsanschluß 8 versehener Saugventileinsatz 9, der zwei einzelne Saugventile 10 und 11 aufweist, ist von unten her in das Gehäuse 3 eingeschraubt. Ein mit einem Druckleitungsanschluß 12 versehener Druckventileinsatz 13, der zwei in Reihe geschaltete Druckventile 14 und 15 aufweist, ist von oben her in das Gehäuse 3 eingeschraubt. Ein nicht dargestellter Deckel schließt das Pumpenkopfgehäuse 3 an der freien Stirnseite ab.A pump chamber 7 is formed between the
Im Gehäuse 3 ist ein Schaltventil 17 zur Schnellentlüftung und eine Drossel 18 zur Dauerentlüftung vorgesehen. Das Schaltventil 17 wird durch einen konischen Ventilsitz 19 mit einem Konuswinkel von 120° und ein Verschlußstück 20 gebildet, das an der Stirnfläche eines Schraubelements 21 angebracht ist. Das Verschlußstück 20 weist einen in eine Umfangsnut eingelegten O-Ring auf. Das Schraubelement 21 ist in eine Gewindebohrung 22 des Gehäuses 3 eingeschraubt und mit Hilfe eines O-Ringes 23 abgedichtet. Die Gewindebohrung 22 mündet mit einem Abschnitt 24 in einer Gehäusebohrung 25, die der Aufnahme des Druckventileinsatzes 13 dient, und zwar an einer Stelle zwischen dem ersten Druckventil 14 und dem zweiten Druckventil 15. Zwischen dem Gewinde 26 des Schraubelements 21 und dem Verschlußstück 20 ist außerhalb des Schraubelements 21 ein Ringraum 27 vorgesehen. Dieser steht über den Endabschnitt 28 einer Querbohrung 29 mit einer Austrittsöffnung 30 in Verbindung. In diese Austrittsöffnung ist ein Stutzen 31 eingesetzt, über den Flüssigkeit bzw. Gas abgeführt werden kann.In the
Zur Bildung der einstellbaren Drossel 18 ist im Schraubelement 21 eine Längsbohrung 32 vorgesehen, in die ein zweites Schraubelement 33 eingeschraubt und mittels eines O-Ringes 34 abgedichtet ist. Ein konischer Drosselsitz 35 wirkt mit einem konischen Drosselelement 36 gleicher Konizität zusammen, so daß zwischen beiden ein konischer Drosselspalt eingestellt werden kann. Der Konuswinkel beträgt 30°. Ein an das konische Drosselelement 36 axial anschließender Zylinderstift 37 ragt durch die Mittelöffnung des Drosselsitzes 35, um kristalline Ablagerungen aus der Mittelöffnung zu entfernen. Radialbohrungen 38 verbinden die Längsbohrung 32 mit dem Ringraum 27. Schaltventil 17 und Drossel 18 sind daher parallel geschaltet.To form the
Wenn eine Schnellentlüftung der Pumpkammer 7 gewünscht wird, beispielsweise zu Arbeitsgbeginn, wird das Schraubelement 21 um eine halbe oder ganze Drehung aufgeschraubt. Dies ergibt einen ausreichend großen Schaltventilquerschnitt, um Luft oder Gas rasch aus der Pumpkammer 7 abzuführen. Hierbei kann die Drossel 18 geschlossen sein, wie es in Fig. 1 dargestellt ist. Für eine Dauerentlüftung gilt die Stellung nach Fig. 2. Hier ist das Schaltventil 17 geschlossen und die Drossel 18 durch Verdrehen des Schraubelements 33 so weit geöffnet, daß zwar Gas entweichen, Flüssigkeit aber nicht oder nicht in nennenswertem Maße austreten kann. Hierbei ist vorteilhaft, daß bei wiederholtem Öffnen und Schließen des Schaltventils 17 durch Verdrehen des Schraubelements 33 stets die gleiche Drosseleinstellung für die Dauerentlüftung beibehalten werden kann.If quick venting of the pump chamber 7 is desired, for example at the start of work, the
Bei der Ausführungsform nach Fig. 3 werden im wesentlichen dieselben Teile wie in den Fig. 1 und 2 verwendet. Der einzige Unterschied besteht darin, daß der Ringraum 27 im Pumpenkopfgehäuse 103 über einen oben angeordneten Querkanal 129 mit einer obenliegenden Austrittsöffnung 130 in Verbindung steht, in die ein Stutzen 131 eingesetzt ist.3, essentially the same parts as in FIGS. 1 and 2 are used. The only difference is that the
Das Schraubelement 21 kann in der Weise in das Gehäuse 3 eingesetzt sein, daß der Ringraum 27 mit der Pumpkammer 7 verbunden ist und die Bohrung 24 zur Austrittsöffnung führt. Die Gewinde der beiden Schraubelemente können unterschiedlich sein; beispielsweise hat das Schraubelement 21 ein gröberes Gewinde und das Schraubelement 33 ein feineres Gewinde.The
Claims (13)
- Venting device for a liquid pump working with delivery and suction strokes, particularly a diaphragm metering pump, whose pump chamber is bounded by a pump head casing containing suction and delivery valves, wherein a vent passage extends from a top space in the pump chamber to an outlet opening and has, connected in parallel, a control valve for rapid venting and an adjustable throttle for continuous venting, and wherein the control valve comprises a valve seat and a closure member formed on a first screw element and the throttle comprises a throttle seat and a throttle element formed on a second screw element, characterised in that the control valve (17) is disposed in the pump head casing (3; 103) and the throttle (18) is disposed in the first screw element (21).
- Venting device according to Claim 1, characterised in that the valve seat (19) is formed in the pump head casing (3; 103) and the first screw element (21) is screwed into a threaded bore (22) in the pump head casing, and in that the second screw element (33) is screwed into a longitudinal bore (32) in the first screw element in which the throttle seat (35) is formed near the closure end.
- Venting device according to Claim 2, characterised in that the first screw element (21) is surrounded by an annular space (27) adjoining the closure member (20) and the longitudinal bore (32) is connected to the annular space.
- Venting device according to Claim 3, characterised in that the longitudinal bore (32) is connected to the annular space (27) by way of at least one radial bore (38).
- Venting device according to one of Claims 2 to 4, characterised in that the threaded bore (22) starts from the free end face of the pump head casing (3; 103) and leads by means of a bore portion (24), which extends beyond the valve seat (19), into a casing bore (25) containing the delivery valve (14, 15).
- Venting device according to one of Claims 2 to 5, characterised in that a cross bore (29; 129) provided in the pump head casing (3; 103) and leading to the outlet opening (30; 130) adjoins the periphery of the threaded bore (22).
- Venting device according to Claim 6, characterised in that the cross bore (29) leads to an outlet opening (30) situated under the threaded bore (22).
- Venting device according to Claim 6, characterised in that the cross bore (129) leads to an outlet opening (130) situated on the upper side of the pump head casing (103).
- Venting device according to one of Claims 1 to 8, characterised in that the valve seat (19) is conical in shape and the closure member (20) comprises an O-ring disposed in a peripheral groove.
- Venting device according to Claim 9, characterised in that the cone angle is greater than 100°.
- Venting device according to one of Claims 1 to 10, characterised in that the throttle seat (35) is conical in shape and the throttle element (36) has the same conicity.
- Venting device according to Claim 11, characterised in that the cone angle is smaller than 60°.
- Venting device according to Claim 11 or 12, characterised in that a cylindrical pin (37), which engages through the central opening of the throttle seat (35), adjoins the conical throttle element (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89103877T ATE80441T1 (en) | 1988-03-10 | 1989-03-06 | BLEEDING DEVICE FOR A LIQUID PUMP. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3807877 | 1988-03-10 | ||
| DE3807877A DE3807877C1 (en) | 1988-03-10 | 1988-03-10 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0332100A2 EP0332100A2 (en) | 1989-09-13 |
| EP0332100A3 EP0332100A3 (en) | 1990-06-27 |
| EP0332100B1 true EP0332100B1 (en) | 1992-09-09 |
Family
ID=6349328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89103877A Expired - Lifetime EP0332100B1 (en) | 1988-03-10 | 1989-03-06 | Deaerator for a liquid-pump |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0332100B1 (en) |
| AT (1) | ATE80441T1 (en) |
| DE (2) | DE3807877C1 (en) |
| ES (1) | ES2034439T3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1025793C2 (en) * | 2004-03-23 | 2005-09-26 | Bba Pompen B V | Ventilation device for plunger pumps, comprises lever with closure body for sealing cylinder air collection chamber outlet and counter body resting on flexible membrane |
| CN101713398B (en) * | 2009-11-23 | 2011-10-26 | 杭州大潮石化设备有限公司 | Pump head combination valve for reciprocating pump |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE520426C (en) * | 1931-03-11 | Franz Gruenauer | Sniffer valve for plunger pumps for ventilation of suction and pressure air vessels | |
| US731893A (en) * | 1902-12-18 | 1903-06-23 | Jas Lawlor | Double-acting pump. |
| FR1487289A (en) * | 1966-07-22 | 1967-06-30 | Texsteam Corp | Volumetric pump |
| DE2803470B2 (en) * | 1978-01-27 | 1980-06-04 | Dulger, Viktor, 6900 Heidelberg | Ventilation device for a liquid piston pump, in particular a metering pump |
| DE8202361U1 (en) * | 1982-01-30 | 1982-06-24 | Chemie Und Filter Gmbh Verfahrenstechnik Kg, 6900 Heidelberg | VENTILATION DEVICE FOR A LIQUID PISTON PUMP, IN PARTICULAR DOSING PUMP |
-
1988
- 1988-03-10 DE DE3807877A patent/DE3807877C1/de not_active Expired
-
1989
- 1989-03-06 DE DE8989103877T patent/DE58902223D1/en not_active Expired - Lifetime
- 1989-03-06 EP EP89103877A patent/EP0332100B1/en not_active Expired - Lifetime
- 1989-03-06 AT AT89103877T patent/ATE80441T1/en not_active IP Right Cessation
- 1989-03-06 ES ES198989103877T patent/ES2034439T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0332100A3 (en) | 1990-06-27 |
| ATE80441T1 (en) | 1992-09-15 |
| ES2034439T3 (en) | 1993-04-01 |
| EP0332100A2 (en) | 1989-09-13 |
| DE58902223D1 (en) | 1992-10-15 |
| DE3807877C1 (en) | 1989-09-21 |
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