EP0739247A1 - Force and suction pump for fluid containers - Google Patents

Force and suction pump for fluid containers

Info

Publication number
EP0739247A1
EP0739247A1 EP95906942A EP95906942A EP0739247A1 EP 0739247 A1 EP0739247 A1 EP 0739247A1 EP 95906942 A EP95906942 A EP 95906942A EP 95906942 A EP95906942 A EP 95906942A EP 0739247 A1 EP0739247 A1 EP 0739247A1
Authority
EP
European Patent Office
Prior art keywords
piston
pressure
fluid container
suction
pressure cylinder
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.)
Granted
Application number
EP95906942A
Other languages
German (de)
French (fr)
Other versions
EP0739247B1 (en
Inventor
Egon Schwab
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.)
Ursatec Verpackung GmbH
Original Assignee
Ursatec Verpackung GmbH
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 Ursatec Verpackung GmbH filed Critical Ursatec Verpackung GmbH
Publication of EP0739247A1 publication Critical patent/EP0739247A1/en
Application granted granted Critical
Publication of EP0739247B1 publication Critical patent/EP0739247B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0041—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure without contact of the fluid remaining in the container with the atmospheric air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0097—Means for filling or refilling the sprayer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1061—Pump priming means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves

Definitions

  • the invention relates to a suction pressure pump according to the preamble of claim 1.
  • Such a suction pressure pump is known, for example, from German patent DE 27 09 796 C3.
  • the liquid to be sprayed is located in a sealed fluid container into which the suction pressure pump protrudes.
  • a piston runs in a pressure cylinder and delimits an upper pressure chamber.
  • This pressure chamber is connected to the fluid container by a valve.
  • An axial pump channel for conveying the fluid from the pressure chamber to an outlet opening is located inside the piston.
  • the piston is held in an upper rest position by spring force. If the user presses the piston, e.g. B by means of an attachable actuating element, the pressure in the pressure chamber increases, the valve opposite the fluid container closes and the liquid in the pressure chamber escapes under pressure through the axial pump channel to the outside. If the user releases the actuating element for the piston, it is pressed upwards by the spring force, a negative pressure being created in the pressure chamber and the valve to the fluid container opening, so that liquid can flow into the pressure chamber again.
  • Suction-pressure pumps of this type are also used for liquids to be kept as germ-free as possible, for example in medical applications. Pumps of this type are also used for spraying liquids in which contact with atmospheric oxygen leads to a reduction in the life of the liquid.
  • the German patent application DE 41 39 555 C2 describes a suction pressure pump with a fluid container which has an additional deformable inner bag which is sealed against the atmosphere, so that the vacuum in the fluid container caused by liquid flowing into the pressure chamber does not become one Air flows into the fluid container.
  • openings are provided in the pressure cylinder for the upper part of the fluid container.
  • the piston is only sealed by a circumferential sealing lip in most of the pressure cylinder. In a certain position of the piston, air can thus flow from the upper part of the fluid container between the piston and the pressure cylinder into the pressure chamber and the pump channel.
  • the pump channel is designed so wide that it is possible to pass a plunger with which the ball valve between the pressure chamber and the fluid container can be closed independently of the pressure.
  • the advantage of the invention is that residual air can be sucked out of a sealed fluid container through the pump and it can be easily checked whether all residual air has been removed.
  • Another advantage is that it is easily possible to fill the pressure chamber with liquid, e.g. H. to preload the pump. This property is particularly advantageous when using tixotropic liquids.
  • a plunger is connected to the piston itself, so that the valve between the fluid container and the pressure chamber is closed in the lowest position of the piston. This allows the residual air to escape Remove the fluid container by simply pushing the piston down, thereby simultaneously closing the valve and creating a connection between the axial pump channel and the fluid container and applying a vacuum to the pump channel.
  • the tappet can have a narrow front area for actuating the valve and a wider area with a star-shaped cross section for mounting in the pump channel.
  • a lower stop for the piston can be provided so that the tappet closes the valve straight, but cannot damage it through excessive pressure.
  • the valve between the pressure chamber and the fluid container is advantageously designed as a ball valve.
  • a particularly advantageous embodiment of the invention is one in which the sealing lip is formed at the lower end of the piston and the area of the pressure cylinder in which the sealing lip does not act as a seal is also provided at the lower end of the pressure chamber.
  • the suction-pressure pump according to the invention can be provided with a manual actuating element which is placed on the axial channel and has a riser pipe leading to an outlet opening or outlet nozzle and with which the compressive force is exerted on the piston.
  • This actuator can be a pressure relief valve, e.g. is described in the patent specification DE 27 09 796 C3.
  • FIG. 1 is a longitudinal section through a suction-pressure pump according to the invention with an attached actuating part in the upper rest position
  • FIG. 2 is a cross section through a suction pressure pump according to the invention with an actuating part attached in the lower actuating position
  • FIG. 3 is a longitudinal section through a suction pressure pump according to the invention in the actuating position
  • 4 is a schematic illustration of the pressure cylinder and piston of a second exemplary embodiment of a suction pressure pump according to the invention
  • Fig. 5 is a cross section along the line V - Vin Figure 4, and
  • Figure 6 is a cross section along the line VI - VI in Figure 4.
  • the suction pressure pump 2 is placed by means of the sealing ring 12 in a sealing manner on the fluid container 1, which is only partially shown here.
  • a piston 3 with an axial pump channel 7 runs in the pressure cylinder 8.
  • the piston 3 is held by a spring 6 at a stop in its upper rest position.
  • the pressure chamber 4, which is connected to the axial pump channel 7, is located between the piston 3 and the ball valve 5.
  • the piston 3 has a smaller outside diameter than the inside diameter of the pressure cylinder 8, so that a gap 14 remains between the outside wall of the piston and the inside wall of the cylinder, which, however, is closed at the bottom by the peripheral sealing lip 9 of the piston.
  • the pressure cylinder 8 has a section 10 with a larger inner diameter, in which the sealing lip 9 does not have a sealing effect.
  • An actuating element 20 attached to the piston 3 has a riser pipe 21 with a pressure relief valve 22 for dispensing the fluid through an outlet opening 23.
  • the sealing lip 9 seals the pressure chamber 4 from the openings 13 to the fluid container 1.
  • the plunger 11 is firmly connected to the piston 3, the section 15 with a star-shaped cross section leaving a connection between the pressure chamber 4 and the pump channel 7.
  • the plunger 1 1 is at a distance from the ball valve 5, so that it opens when the pressure in the pressure chamber 4 is opposite the fluid container 1 and closes when the pressure is low.
  • the shortened actuation path of the piston 3 thus remains along the section of the pressure cylinder 8 in which the sealing lip 9 is guided in a sealing manner.
  • the length and diameter of the pressure chamber 4 can be chosen so that a sufficient volume of liquid can be conveyed with each piston movement.
  • FIGS. Figure 4 shows in longitudinal section the pressure cylinder 8, in which the piston 3 is guided sealingly.
  • the piston 3 with a constant diameter has axial outside recesses 18 above the sealing lip 9.
  • axial recesses 19 on the inside are formed in the lower region of the pressure cylinder 8.

Landscapes

  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

PCT No. PCT/EP95/00132 Sec. 371 Date Sep. 19, 1996 Sec. 102(e) Date Sep. 19, 1996 PCT Filed Jan. 13, 1995 PCT Pub. No. WO95/19230 PCT Pub. Date Jul. 20, 1995A suction and force pump for a fluid in a sealed fluid container makes possible the drawing off by suction of residual air after the filling of the container with fluid, with the piston (3) in a particular position in the pressure cylinder (8) of the pump, by means of the pump channel (7) of the pump itself. For this purpose there is provided a channel for drawing off the residual air by suction, from the upper side of the fluid container through openings (13), a gap between piston (3) and the internal wall of the pressure cylinder (8), which gap is sealed with respect to the pressure cylinder (8) only by means of a peripheral sealing lip (9), through the pressure chamber (6) to the pump channel (7). The valve (5) to the fluid container is thereby closeable independently of pressure during the pumping away, by means of a plunger (11).

Description

Saug-Druckpumpe für Fluidbehälter Suction pressure pump for fluid containers
Die Erfindung betrifft eine Saug-Druckpumpe nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a suction pressure pump according to the preamble of claim 1.
Eine derartige Saug-Druckpumpe ist bspw. aus der deutschen Patentschrift DE 27 09 796 C3 bekannt. Die zu versprühende Flüssigkeit befindet sich in einem abgedichteten Fluidbehälter, in den die Saug-Druckpumpe hineinragt. In einem Druckzylinder läuft ein Kolben, der eine Druckkammer nach oben hin begrenzt. Diese Druckkammer ist durch ein Ventil mit dem Fluidbehälter verbunden. In Innern des Kolbens befindet sich ein axialer Pumpkanal zur Förderung des Fluids aus der Druckkammer zu einer Auslaßöffnung. Der Kolben wird durch Federkraft in einer oberen Ruheposition gehalten. Drückt der Benutzer den Kolben, z. B mittels eines aufsetzbaren Betätigungselementes nach unten, so erhöht sich der Druck in der Druckkammer, das Ventil gegenüber dem Fluidbehälter schließt sich und die in der Druckkammer befindliche Flüssigkeit entweicht unter Druck durch den axialen Pumpkanal nach außen. Läßt der Benutzer das Betätigungselement für den Kolben los, so wird dieser durch die Federkraft nach oben gedrückt, wobei ein Unterdruck in der Druckkammer entsteht und das Ventil zum Fluidbehälter öffnet, so daß wieder Flüssigkeit in die Druckkammer nachströmen kann.Such a suction pressure pump is known, for example, from German patent DE 27 09 796 C3. The liquid to be sprayed is located in a sealed fluid container into which the suction pressure pump protrudes. A piston runs in a pressure cylinder and delimits an upper pressure chamber. This pressure chamber is connected to the fluid container by a valve. An axial pump channel for conveying the fluid from the pressure chamber to an outlet opening is located inside the piston. The piston is held in an upper rest position by spring force. If the user presses the piston, e.g. B by means of an attachable actuating element, the pressure in the pressure chamber increases, the valve opposite the fluid container closes and the liquid in the pressure chamber escapes under pressure through the axial pump channel to the outside. If the user releases the actuating element for the piston, it is pressed upwards by the spring force, a negative pressure being created in the pressure chamber and the valve to the fluid container opening, so that liquid can flow into the pressure chamber again.
Derartige Saug-Druckpumpen werden auch für möglichst keimfrei aufzubewahrende Flüssigkeiten, etwa bei medizinischen Anwendungen benutzt. Ebenso werden derartige Pumpen zum Versprühen von Flüssigkeiten benutzt, bei denen der Kontakt mit Luftsauerstoff zu einer Verminderung der Lebensdauer der Flüssigkeit führt. Für derartige Anwendungen ist in der deutschen Patentanmeldung DE 41 39 555 C2 eine Saug-Druckpumpe mit eine Fluidbehälter beschrieben, der einen zusätzlichen verformbaren und gegenüber der Atmosphäre abgedichteten Innenbeutel aufweist, so daß der durch in die Druckkammer nachströmende Flüssigkeit verursachte Unterdruck im Fluidbehälter nicht zu einem Einströmen von Luft in den Fluidbehälter führt.Suction-pressure pumps of this type are also used for liquids to be kept as germ-free as possible, for example in medical applications. Pumps of this type are also used for spraying liquids in which contact with atmospheric oxygen leads to a reduction in the life of the liquid. For such applications, the German patent application DE 41 39 555 C2 describes a suction pressure pump with a fluid container which has an additional deformable inner bag which is sealed against the atmosphere, so that the vacuum in the fluid container caused by liquid flowing into the pressure chamber does not become one Air flows into the fluid container.
Jedoch weisen derartige luftausgleichsfreie Saug-Druckpumpen den Nachteil auf, daß beim Füllen des Behälters Restluft im Fluidbehälter verbleibt und diese auch nicht entfernt werden kann. Somit steht die Flüssigkeit ständig mit Luftsauerstoff in Verbindung, was zu einer Verminderung der Aufbewahrungsdauer oder der Keimfreiheit der Flüssigkeit führt. Ein Abfüllen der Fluidbehälter in keimfreier Atmosphäre oder unter Schutzgas ist jedoch sehr aufwendig und teuer. Der Erfindung liegt daher die Aufgabe zugrunde, eine Druck-Saugpumpe zu schaffen, bei der nach dem Füllvorgang das Entfernen von Restluft auf einfache Art und Weise möglich ist.However, such air balancing-free suction pressure pumps have the disadvantage that residual air remains in the fluid container when the container is being filled, and this cannot be removed either. Thus, the liquid is constantly in contact with atmospheric oxygen, which leads to a reduction in the storage time or the sterility of the liquid. Filling the fluid container in a germ-free atmosphere or under protective gas is, however, very complex and expensive. The invention is therefore based on the object of providing a pressure suction pump in which the removal of residual air is possible in a simple manner after the filling process.
Diese Aufgabe wird durch die in Anspruch 1 beanspruchte Merkmalskombination gelöst.This object is achieved by the combination of features claimed in claim 1.
Um die Restluft bei geschlossenem Behälter, das heißt bei aufgesetzter Dosierpumpe absaugen zu können, sind im Druckzylinder Öffnungen zum oberen Teil des Fluidbehälters vorgesehen. Der Kolben ist nur durch eine umfangsseitige Dichtlippe im größten Teil des Druckzylinders abgedichtet geführt. In einer bestimmten Position des Kolbens kann somit Luft aus dem oberen Teil des Fluidbehälters zwischen Kolben und Druckzylinder vorbei in die Druckkammer und den Pumpkanal strömen. Außerdem ist der Pumpkanal so breit ausgelegt, daß es möglich ist, einen Stößel hindurchzuführen, mit dem das Kugelventil zwischen Druckkammer und Fluidbehälter druckunabhängig verschlossen werden kann. Beaufschlagt man in der genannten Kolbenposition den axialen Pumpkanal mit Vakuum und verschließt gleichzeitig das Kugel ventil, so kann kein Fluid aus dem Fluidbehälter aufgrund des Unterdrucks in die Druckkammer gelangen, sondern es wird ausschließlich die im oberen Teil des Behälters befindliche Restluft abgesaugt. Gelangt schließlich Flüssigkeit durch den axialen Pumpkanal nach außen, so ist sicher gewährleistet, daß sich keine Restluft mehr im Fluidbehälter oder in der Druckkammer befindet. Der Betätigungsweg des Kolbens im Druckzylinder, wo die Dichtlippe abdichtet, steht zum Dπickaufbau zum Versprühen der Flüssigkeit, wie oben beschrieben, zur Verfügung.In order to be able to draw off the residual air when the container is closed, that is to say when the metering pump is attached, openings are provided in the pressure cylinder for the upper part of the fluid container. The piston is only sealed by a circumferential sealing lip in most of the pressure cylinder. In a certain position of the piston, air can thus flow from the upper part of the fluid container between the piston and the pressure cylinder into the pressure chamber and the pump channel. In addition, the pump channel is designed so wide that it is possible to pass a plunger with which the ball valve between the pressure chamber and the fluid container can be closed independently of the pressure. If one presses the axial pump channel with vacuum in the piston position mentioned and at the same time closes the ball valve, no fluid can get from the fluid container into the pressure chamber due to the negative pressure, but only the residual air located in the upper part of the container is extracted. Finally, if liquid gets out through the axial pump channel, it is reliably ensured that there is no residual air in the fluid container or in the pressure chamber. The actuation path of the piston in the pressure cylinder, where the sealing lip seals, is available for build-up to spray the liquid, as described above.
Der Vorteil der Erfindung liegt darin, daß aus einem abgedichteten Fluidbehälter durch die Pumpe hindurch Restluft abgesaugt werden kann und leicht überprüfbar ist, ob sämtliche Restluft entfernt ist.The advantage of the invention is that residual air can be sucked out of a sealed fluid container through the pump and it can be easily checked whether all residual air has been removed.
Ein weiterer Vorteil liegt darin, daß es leicht möglich ist, die Druckkammer mit Flüssigkeit zu füllen, d. h. die Pumpe vorzuladen. Diese Eigenschaft ist insbesondere bei dem Einsatz von tixotropischen Flüssigkeiten vorteilhaft.Another advantage is that it is easily possible to fill the pressure chamber with liquid, e.g. H. to preload the pump. This property is particularly advantageous when using tixotropic liquids.
Bei einer weiteren Ausbildung der Erfindung ist ein Stößel mit dem Kolben selbst verbunden, so daß in der untersten Position des Kolbens das Ventil zwischen Fluidbehälter und Druckkammer verschlossen ist. Dadurch läßt sich die Restluft aus dem Fluidbehälter entfernen, indem einfach der Kolben nach unten gedrückt wird, dadurch gleichzeitig das Ventil geschlossen und eine Verbindung zwischen axialem Pumpkanal und dem Fluidbehälter geschaffen wird und der Pumpkanal mit Vakuum beaufschlagt wird.In a further embodiment of the invention, a plunger is connected to the piston itself, so that the valve between the fluid container and the pressure chamber is closed in the lowest position of the piston. This allows the residual air to escape Remove the fluid container by simply pushing the piston down, thereby simultaneously closing the valve and creating a connection between the axial pump channel and the fluid container and applying a vacuum to the pump channel.
Der Stößel kann in einer weiteren Ausbildung der Erfindung einen schmalen vorderen Bereich zur Betätigung des Ventils und einen breiteren Bereich mit sternförmigen Querschnitt zur Halterung im Pumpkanal aufweisen.In a further embodiment of the invention, the tappet can have a narrow front area for actuating the valve and a wider area with a star-shaped cross section for mounting in the pump channel.
Weiterhin kann ein unterer Anschlag für den Kolben vorgesehen sein, so daß der Stößel das Ventil gerade schließt, nicht aber durch zu starken Druck beschädigen kann.Furthermore, a lower stop for the piston can be provided so that the tappet closes the valve straight, but cannot damage it through excessive pressure.
Das Ventil zwischen Druckkammer und Fluidbehälter ist vorteilhaft als Kugelventil ausgebildet.The valve between the pressure chamber and the fluid container is advantageously designed as a ball valve.
Besonders vorteilhaft ist ein Ausbildung der Erfindung, bei der die Dichtlippe am unteren Ende des Kolbens ausgebildet ist und der Bereich des Druckzylinders, in dem die Dichtlippe nicht dichtend wirkt, ebenfalls am unteren Ende der Druckkammer vorgesehen ist.A particularly advantageous embodiment of the invention is one in which the sealing lip is formed at the lower end of the piston and the area of the pressure cylinder in which the sealing lip does not act as a seal is also provided at the lower end of the pressure chamber.
Die erfindungsgemäße Saug-Druckpumpe kann mit einem auf den axialen Kanal aufgesetzten, ein zu einer Auslaßöffnung oder Auslaßdüse führendes Steigrohr aufweisenden Handbetätigungselement, mit dem die Druckkraft auf den Kolben ausgeübt wird, versehen werden. Dieses Betätigungselement kann ein Überdruckventil, wie es z.B. in der Patentschrift DE 27 09 796 C3 beschrieben ist, aufweisen.The suction-pressure pump according to the invention can be provided with a manual actuating element which is placed on the axial channel and has a riser pipe leading to an outlet opening or outlet nozzle and with which the compressive force is exerted on the piston. This actuator can be a pressure relief valve, e.g. is described in the patent specification DE 27 09 796 C3.
Im folgenden wird die Erfindung im einzelnen anhand der Zeichnungen beschrieben, in denenIn the following the invention is described in detail with reference to the drawings, in which
Fig. 1 ein Längsschnitt durch eine erfindungsgemäße Saug-Druckpumpe mit aufgesetztem Betätigungsteil in der oberen Ruheposition ist,1 is a longitudinal section through a suction-pressure pump according to the invention with an attached actuating part in the upper rest position,
Fig. 2 ein Querschnitt durch eine erfindungsgemäße Saug-Druckpumpe mit aufgesetztem Betätigungssteil in der unteren Betätigungsposition ist,2 is a cross section through a suction pressure pump according to the invention with an actuating part attached in the lower actuating position,
Fig. 3 ein Längsschnitt durch eine erfindungsgemäße Saug-Druckpumpe in Betätigungsposition ist, Fig. 4 eine schematische Darstellung von Druckzylinder und Kolben eines zweiten Ausführungsbeispiels einer erfindungsgemäßen Saug-Druckpumpe ist,3 is a longitudinal section through a suction pressure pump according to the invention in the actuating position, 4 is a schematic illustration of the pressure cylinder and piston of a second exemplary embodiment of a suction pressure pump according to the invention,
Fig. 5 ein Querschnitt entlang der Linie V - Vin Figur 4, undFig. 5 is a cross section along the line V - Vin Figure 4, and
Fig. 6 ein Querschnitt entlang der Linie VI - VI in Figur 4 ist.Figure 6 is a cross section along the line VI - VI in Figure 4.
Die Saug-Druckpumpe 2 ist mittels des Dichtrings 12 dichtend auf dem hier nur teilweise dargestellten Fluidbehälter 1 aufgesetzt. Im Druckzylinder 8 läuft ein Kolben 3 mit einem axialen Pumpkanal 7. Der Kolben 3 wird von einer Feder 6 an einem Anschlag in seiner oberen Ruheposition gehalten. Zwischen dem Kolben 3 und dem Kugelventil 5 befindet sich die Druckkammer 4, die mit dem axialen Pumpkanal 7 verbunden ist. Der Kolben 3 hat einen kleineren Außendurchmesser als der Innendurchmesser des Druckzylinders 8, so daß ein Spalt 14 zwischen Kolbenaußenwand und Zylinderinnenwand verbleibt, der nach unten jedoch von der umfangsseitigen Dichtlippe 9 des Kolbens verschlossen wird. Im unteren Bereich der Druckkammer 4 weist der Druckzylinder 8 einen Abschnitt 10 mit größerem Innendurchmesser auf, in dem die Dichtlippe 9 nicht dichtend wirkt. Ein auf den Kolben 3 angesetztes Betätigungselement 20 weist ein Steigrohr 21 mit einem Überdruckventil 22 zur Abgabe des Fluids durch eine Auslaßöffnung 23 auf. In der in Figur 1 dargestellten oberen Ruheposition des Kolbens 3 dichtet die Dichtlippe 9 die Druckkammer 4 gegenüber den Öffnungen 13 zum Fluidbehälter 1 ab. Der Stößel 11 ist fest mit dem Kolben 3 verbunden, wobei der Abschnitt 15 mit sternförmigem Querschnitt eine Verbindung zwischen Druckkammer 4 und Pumpkanal 7 freiläßt. In der Ruheposition der Pumpe hat der Stößel 1 1 einen Abstand vom Kugelventil 5, so daß dieses sich bei Überdruck in der Druckkammer 4 gegenüber dem Fluidbehälter 1 öffnet und bei Unterdruck schließt.The suction pressure pump 2 is placed by means of the sealing ring 12 in a sealing manner on the fluid container 1, which is only partially shown here. A piston 3 with an axial pump channel 7 runs in the pressure cylinder 8. The piston 3 is held by a spring 6 at a stop in its upper rest position. The pressure chamber 4, which is connected to the axial pump channel 7, is located between the piston 3 and the ball valve 5. The piston 3 has a smaller outside diameter than the inside diameter of the pressure cylinder 8, so that a gap 14 remains between the outside wall of the piston and the inside wall of the cylinder, which, however, is closed at the bottom by the peripheral sealing lip 9 of the piston. In the lower region of the pressure chamber 4, the pressure cylinder 8 has a section 10 with a larger inner diameter, in which the sealing lip 9 does not have a sealing effect. An actuating element 20 attached to the piston 3 has a riser pipe 21 with a pressure relief valve 22 for dispensing the fluid through an outlet opening 23. In the upper rest position of the piston 3 shown in FIG. 1, the sealing lip 9 seals the pressure chamber 4 from the openings 13 to the fluid container 1. The plunger 11 is firmly connected to the piston 3, the section 15 with a star-shaped cross section leaving a connection between the pressure chamber 4 and the pump channel 7. In the rest position of the pump, the plunger 1 1 is at a distance from the ball valve 5, so that it opens when the pressure in the pressure chamber 4 is opposite the fluid container 1 and closes when the pressure is low.
In Figur 2 und Figur 3 ist der Kolben 3 in seiner untersten Position dargestellt. Die Feder 6 ist fast vollständig zusammengedrückt. Der Stößel 11 verschließt das Kugelventil 5 unabhängig vom Druck in der Druckkammer 4 oder dem Fluidbehälter 1. Wie am besten aus Figur 3 zu entnehmen ist, besteht jetzt eine durch Pfeile illustrierte Verbindung zwischen dem Innern des Fluidbehälters 1 über die Öffnungen 13, den Spalt 14 zwischen Druckzylinder 8 und Kolben 3, den Spalt zwischen dem Abschnitt 10 des Druckzylinders 8 mit dickerer Bohrung und der Dichtlippe 9 und über den sternförmigen Abschnitt 15 des Stößels 11 bis zum Pumpkanal 7. Beaufschlagt man den Pumpkanal 7 mit Vakuum, so kann Restluft vom oberen Ende des Fluidbehälters 1 auf dem eben genannten Weg abgepumpt werden. Das Kugelventil 5 bleibt dabei sicher geschlossen, um keine Flüssigkeit anzusaugen. Ein Anschlag 17 sorgt dafür, daß beim Herunterdrücken des Kolbens 3 die Ventilkugel 5 durch den Stößel 1 1 nicht aus ihrer Verankerung gelöst wird.In Figure 2 and Figure 3, the piston 3 is shown in its lowest position. The spring 6 is compressed almost completely. The plunger 11 closes the ball valve 5 regardless of the pressure in the pressure chamber 4 or the fluid container 1. As can best be seen from FIG. 3, there is now a connection, illustrated by arrows, between the interior of the fluid container 1 via the openings 13, the gap 14 between the pressure cylinder 8 and the piston 3, the gap between the section 10 of the pressure cylinder 8 with a thicker bore and the sealing lip 9 and via the star-shaped section 15 of the plunger 11 to the pump channel 7 Pump channel 7 with vacuum, so residual air can be pumped out of the upper end of the fluid container 1 in the way just mentioned. The ball valve 5 remains securely closed in order not to suck in any liquid. A stop 17 ensures that when the piston 3 is pressed down, the valve ball 5 is not released from its anchoring by the plunger 11.
Zum Betätigen der Pumpe verbleibt somit der verkürzte Betätigungsweg des Kolbens 3 entlang des Abschnitts des Druckzylinders 8, in dem die Dichtlippe 9 dichtend geführt ist. Länge und Durchmesser der Druckkammer 4 können so gewählt werden, um ein ausreichendes Flüssigkeitsvolumen bei jeder Kolbenbewegung fördern zu können.To actuate the pump, the shortened actuation path of the piston 3 thus remains along the section of the pressure cylinder 8 in which the sealing lip 9 is guided in a sealing manner. The length and diameter of the pressure chamber 4 can be chosen so that a sufficient volume of liquid can be conveyed with each piston movement.
In den Figuren 4 bis 6 ist ein zweites Ausführungsbeispiel einer erfindungsgemäßen Saug-Druckpumpe schematisch dargestellt. Figur 4 zeigt im Längsschnitt den Druckzylinder 8, in dem der Kolben 3 dichtend geführt ist. Der Kolben 3 mit konstantem Durchmesser weist oberhalb der Dichtlippe 9 axiale außenseitige Ausnehmungen 18 auf. Ebenso sind, wie auch aus der Querschnittsdarstellung in Figur 6 zu erkennen ist, im unteren Bereich des Druckzylinders 8 innenseitige axiale Ausnehmungen 19 ausgeformt. Bei heruntergedrücktem Kolben 3 besteht somit wiederum eine Verbindung vom Fluidbehälter durch die Öffnungen 13, die Ausnehmungen 18 und 19, den Abschnitt 15 mit sternförmigen Querschnitt des Stößels bis zum Pumpkanal 7,- über den Restluft aus dem Fluidbehälter abgesaugt werden kann. A second exemplary embodiment of a suction pressure pump according to the invention is shown schematically in FIGS. Figure 4 shows in longitudinal section the pressure cylinder 8, in which the piston 3 is guided sealingly. The piston 3 with a constant diameter has axial outside recesses 18 above the sealing lip 9. Likewise, as can also be seen from the cross-sectional illustration in FIG. 6, axial recesses 19 on the inside are formed in the lower region of the pressure cylinder 8. When the piston 3 is pressed down, there is again a connection from the fluid container through the openings 13, the recesses 18 and 19, the section 15 with a star-shaped cross section of the plunger to the pump channel 7, via which residual air can be sucked out of the fluid container.

Claims

ANSPRUCHE EXPECTATIONS
1. Saug-Druckpumpe für ein sich in einem abgedichteten Fluidbehälter (1) befindliches1. Suction pressure pump for a located in a sealed fluid container (1)
Fluid, aufweisend einen in den Fluidbehälter (1) hineinragenden Druckzylinder (8), einen in dem Druckzylinder (8) abdichtend geführten Kolben (3) mit einem axialenFluid, comprising a pressure cylinder (8) protruding into the fluid container (1), a piston (3) sealingly guided in the pressure cylinder (8) with an axial piston
Pumpkanal (7), eine im Druckzylinder (8) ausgebildete Druckkammer (4), die durch den Kolben (3) und durch ein gegenüber dem Fluidbehälter (1) wirkendes Ventil (5), das beiPump channel (7), a pressure chamber (4) formed in the pressure cylinder (8), through the piston (3) and through a valve (5) acting in relation to the fluid container (1)
Überdruck schließt und bei Unterdruck öffnet, begrenzt ist und mit dem axialenOverpressure closes and opens at underpressure, is limited and with the axial
Pumpkanal (7) verbunden ist, dadurch gekennzeichnet, daß der Kolben (3) im Druckzylinder (8) nur durch eine umfangsseilige Dichtlippc (9) abgedichtet ist, der Druckzylinder (8) einen Bereich (10) aufweist, in dem die Dichtlippc (9) keine abdichtende Wirkung hat, der axiale Pumpkanal (7) einen so großen Innendurchmesser aufweist, daß ein Stößel hindurchgeführt werden kann, mit dem das Ventil (5) zum Fluidbehälter (1) druckunabhängig verschließbar ist, und der Druckzylindcr (8) Öffnungen zum oberen Teil des Fluidbehälters (1) zumPump channel (7) is connected, characterized in that the piston (3) in the pressure cylinder (8) is sealed only by a circumferential sealing lip (9), the pressure cylinder (8) has a region (10) in which the sealing lip (9 ) has no sealing effect, the axial pump channel (7) has such a large inner diameter that a plunger can be passed with which the valve (5) to the fluid container (1) can be closed independently of the pressure, and the pressure cylinder (8) has openings to the top Part of the fluid container (1) for
Absaugen von im Fluidbehälter (1) befindlicher Restluft aufweist.Extracting residual air in the fluid container (1).
2. Saug-Druckpumpe nach Anspruch 1 , dadurch gekennzeichnet, daß mit dem Kolben (3) ein Stößel (I I) verbunden ist, der in der untersten Position des Kolbens (3) das Ventil (5) zum Fluidbehälter (1) druckunabhängig verschließt. 2. Suction-pressure pump according to claim 1, characterized in that a plunger (II) is connected to the piston (3), which closes the valve (5) to the fluid container (1) independently of pressure in the lowest position of the piston (3).
3. Saug-Druckpumpe nach Anspruch 2, dadurch gekennzeichnet, daß der Stößel (11) einen unteren schmalen Bereich zur Betätigung des Ventils (5) und einen oberen breiteren Bereich (15) mit sternförmigem Querschnitt zur Halterung im Pumpkanal (7) aufweist.3. Suction pressure pump according to claim 2, characterized in that the plunger (11) has a lower narrow area for actuating the valve (5) and an upper wider area (15) with a star-shaped cross section for mounting in the pump channel (7).
4. Saug-Druckpumpe nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß ein unterer Anschlag (17) für den Kolben (3) vorgesehen ist.4. Suction pressure pump according to claim 2 or 3, characterized in that a lower stop (17) for the piston (3) is provided.
5. Saug-Druckpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Ventil (5) zwischen Druckkammer (4) und Fluidbehälter (1) als Kugelventil ausgebildet ist.5. Suction pressure pump according to one of claims 1 to 4, characterized in that the valve (5) between the pressure chamber (4) and fluid container (1) is designed as a ball valve.
6. Saug-Druckpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß sich die Dichtlippe (9) am unteren Ende des Kolbens (3) befindet und sich der6. Suction pressure pump according to one of claims 1 to 5, characterized in that the sealing lip (9) is located at the lower end of the piston (3) and the
Bereich (10) des Druckzylinders (8), in dem die Dichtlippe (9) nicht abdichtend wirkt, ebenfalls am unteren Ende der Druckkammer (4) vorgesehen ist.Area (10) of the pressure cylinder (8), in which the sealing lip (9) does not have a sealing effect, is also provided at the lower end of the pressure chamber (4).
7. Saug-Druckpumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Kolben (3) einen kleineren Außendurchmesser als der Innendurchmesser des7. Suction pressure pump according to one of claims 1 to 6, characterized in that the piston (3) has a smaller outer diameter than the inner diameter of the
Druckzylinders (8) hat und der Bereich (10) des Druckzylinders (8), in dem die Dichtlippe (9) des Kolbens (3) nicht dichtend wirkt, einen größeren Innendurchmesser als der Außendurchmesser der Dichtlippe (9) hat.Pressure cylinder (8) and the area (10) of the pressure cylinder (8), in which the sealing lip (9) of the piston (3) does not have a sealing effect, has a larger inner diameter than the outer diameter of the sealing lip (9).
8. Saug-Druckpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Kolben (3) einschließlich Dichtlippe (9) einen konstanten Außendurchmesser und der Druckzylinder (8) einen konstanten Innenurch esser aufweisen, wobei im Kolben (3) oberhalb der Dichtlippe (9) außenseitige axiale Ausnehmungen (18) vorgesehen sind und in dem Bereich (10) des Druckzylinders (8), in dem die Dichtlippe (9) nicht dichtend wirkt, innenseitige axiale Ausnehmungen (19) ausgeformt sind.8. Suction-pressure pump according to one of claims 1 to 7, characterized in that the piston (3) including the sealing lip (9) have a constant outer diameter and the pressure cylinder (8) have a constant inner diameter, the piston (3) above the Sealing lip (9) on the outside axial recesses (18) are provided and on the inside (10) of the pressure cylinder (8), in which the sealing lip (9) does not have a sealing effect, inside axial recesses (19) are formed.
9. Saug-Druckpumpe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß ein auf dem Kolben (3) aufsetzbares Betätigungselement (20) mit einem in einem Fluidauslaß (23) mündenden Steigrohr (21) vorgesehen ist, welches Steigrohr (21) mit dem im Kolben (3) ausformten axialen Pumpkanal (7) verbunden ist. 9. Suction pressure pump according to one of claims 1 to 8, characterized in that an actuating element (20) which can be placed on the piston (3) is provided with a riser pipe (21) opening into a fluid outlet (23), which riser pipe (21) is connected to the axial pump channel (7) formed in the piston (3).
10. Saug-Druckpumpe nach Anspruch 9, dadurch gekennzeichnet, daß im Steigrohr (21) des Betätigungselementes (20) ein Überdruckventil (22) vorgesehen ist. 10. Suction pressure pump according to claim 9, characterized in that a pressure relief valve (22) is provided in the riser pipe (21) of the actuating element (20).
EP95906942A 1994-01-14 1995-01-13 Force and suction pump for fluid containers Expired - Lifetime EP0739247B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4400944 1994-01-14
DE4400944A DE4400944A1 (en) 1994-01-14 1994-01-14 Suction pressure pump for fluid containers
PCT/EP1995/000132 WO1995019230A1 (en) 1994-01-14 1995-01-13 Force and suction pump for fluid containers

Publications (2)

Publication Number Publication Date
EP0739247A1 true EP0739247A1 (en) 1996-10-30
EP0739247B1 EP0739247B1 (en) 1998-04-29

Family

ID=6507932

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EP95906942A Expired - Lifetime EP0739247B1 (en) 1994-01-14 1995-01-13 Force and suction pump for fluid containers

Country Status (5)

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US (1) US5692649A (en)
EP (1) EP0739247B1 (en)
AT (1) ATE165534T1 (en)
DE (2) DE4400944A1 (en)
WO (1) WO1995019230A1 (en)

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Also Published As

Publication number Publication date
ATE165534T1 (en) 1998-05-15
US5692649A (en) 1997-12-02
DE4400944A1 (en) 1995-07-20
EP0739247B1 (en) 1998-04-29
DE59502051D1 (en) 1998-06-04
WO1995019230A1 (en) 1995-07-20

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