DE4122523A1 - Piston pump with a coaxial pressure reservoir - - compact arrangement of two pistons on a common piston rod - Google Patents

Piston pump with a coaxial pressure reservoir - - compact arrangement of two pistons on a common piston rod

Info

Publication number
DE4122523A1
DE4122523A1 DE19914122523 DE4122523A DE4122523A1 DE 4122523 A1 DE4122523 A1 DE 4122523A1 DE 19914122523 DE19914122523 DE 19914122523 DE 4122523 A DE4122523 A DE 4122523A DE 4122523 A1 DE4122523 A1 DE 4122523A1
Authority
DE
Germany
Prior art keywords
piston
piston rod
piston pump
pump
housing
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.)
Withdrawn
Application number
DE19914122523
Other languages
German (de)
Inventor
Friedhelm Schneider
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19914122523 priority Critical patent/DE4122523A1/en
Publication of DE4122523A1 publication Critical patent/DE4122523A1/en
Withdrawn legal-status Critical Current

Links

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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/025—Stopping, starting, unloading or idling control by means of floats
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in the reservoir
    • F04B23/023—Pumping installations or systems having reservoirs the pump being immersed in the reservoir only the pump-part being immersed, the driving-part being outside the reservoir

Landscapes

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

Abstract

Piston pump with a pressure reservoir arranged coaxially one behind the other having a working piston (6) and a reservoir piston (11) so axially and radially arranged on the piston rod (2) mounted in the housing (1) that no mechanical contact occurs between the two pistons and the housing. Sealing takes place exclusively by means of sealing rings (29 30). USE/ADVANTAGE - Piston pump for handling aggressive fluids and for use as an immersion pump for emptying vessels, having a compact and space-saving construction.

Description

Aufgabe dieser Erfindung ist es, eine möglichst kompakte Kolbenpumpe mit Druckspeicher herzu­ stellen, die auch für aggressive Flüssigkeiten geeignet ist und sich auch zur Anwendung als Tauchpumpe zum Entleeren von Fässern eignet.The object of this invention is to make one possible compact piston pump with pressure accumulator make also for aggressive liquids is suitable and also suitable for use as Submersible pump suitable for emptying barrels.

Zur Lösung dieser Aufgabe ist eine Kolbenpumpe vorgesehen, die mit einem Federdruckspeicher koaxial zusammengebaut ist.A piston pump is used to solve this task provided with a spring pressure accumulator is coaxially assembled.

Die Fig. 1 zeigt eine Ausführung der Erfindung mit einer Exzenterkolbenpumpe. Unten im Gehäuse 1 ist die koaxial angeordnete Kolbenstange 2 axial beweglich in der Lager­ buchse 3 gelagert. Oben ist die Kolbenstange 2 im Gehäuseflansch 4 durch die Lagerbuchse 5 axial geführt. Am unteren Ende der Kolbenstange 2 ist der Arbeitskolben 6 befestigt. Unter dem Kolben 6 befindet sich der Arbeitsraum 7 der Exzenterpumpe. Der Abschluß des Arbeitsraumes 7 nach unten erfolgt durch die Platte 8 und den Gehäusedeckel 9, in dem sich das Saugventil 10 befindet. Auf der Kolbenstange 2 ist der Speicherkolben 11 durch die Lagerbuchsen 12 und 13 axial und radial geführt und arbeitet gegen die Druckfeder 14. Am oberen Ende der Kolben­ stange 2 ist der Federteller 15 durch die Druckschraube 16 befestigt. Am Gehäuseflansch 4 fest verschraubt ist der Getriebemotor 17 mit der Exzenterscheibe 18. Die Druckfeder 19 zieht den Arbeitskolben 6 mit der Kolbenstange 2 über den Federteller 15 nach oben, bis die Druck­ schraube 16 fest an der Exzenterscheibe 18 anliegt. Der Getriebemotor 17 bringt über die kugelgelagerte Exzenterscheibe 18 den Arbeits­ kolben 6 in oszillierende Bewegung. Fig. 1 shows an embodiment of the invention with an eccentric piston pump. Down in the housing 1 , the coaxially arranged piston rod 2 is axially movable in the bearing bush 3 . Above, the piston rod 2 is axially guided in the housing flange 4 through the bearing bush 5 . The working piston 6 is fastened to the lower end of the piston rod 2 . The working space 7 of the eccentric pump is located under the piston 6 . The work space 7 is closed at the bottom by the plate 8 and the housing cover 9 , in which the suction valve 10 is located. On the piston rod 2 , the storage piston 11 is guided axially and radially through the bearing bushes 12 and 13 and works against the compression spring 14 . At the upper end of the piston rod 2 , the spring plate 15 is fastened by the pressure screw 16 . The geared motor 17 is firmly screwed to the housing flange 4 with the eccentric disk 18 . The compression spring 19 pulls the working piston 6 with the piston rod 2 via the spring plate 15 upwards until the pressure screw 16 bears firmly against the eccentric disk 18 . The gear motor 17 brings about the ball-bearing eccentric 18, the working piston 6 in oscillating motion.

Beim Saughub des Arbeitskolbens 6 (durch die Druckfeder 19 betätigt) wird die zu fördernde Flüssigkeit über die Bohrung 20 und das Saug­ ventil 10 in den Arbeitsraum 7 gefördert. Beim Arbeitshub wird die Flüssigkeit über das feder­ belastete, als Kugel ausgeführte Druckventil 21, und die Bohrungen 22 und 23 in den Speicherraum 24 gefördert. Mit zunehmender Fördermenge bewegt sich der Speicherkolben 11 nach oben gegen die Druckfeder 14 und der Druck im Speicherraum 24 steigt entsprechend der Federkennlinie der Druckfeder 14 an. Durch die Oberkante 25 des Speicherkolbens 11 wird ein verstellbarer Schalter 26 (beispielsweise ein Näherungs­ schalter) angesteuert, der direkt oder über ein elektrisches Schütz den Getriebemotor 17 ab­ schaltet und bei wieder absinkendem Druck ein­ schaltet. Der Schalter 26 kann stufenlos bis in die strichpunktiert gezeichnete Stellung 27 gebracht werden. Dadurch kann der Druck der Flüssigkeit im Speicherraum 24 in bestimmten Grenzen verändert werden. Durch die Bohrung 28 wird die Flüssigkeit dem Verbraucher (beispiels­ weise einer Dosierpistole) zugeführt.During the suction stroke of the working piston 6 (actuated by the compression spring 19 ), the liquid to be delivered is conveyed through the bore 20 and the suction valve 10 into the working space 7 . During the working stroke, the liquid is conveyed into the storage space 24 via the spring-loaded pressure valve 21 designed as a ball, and the bores 22 and 23 . As the delivery rate increases, the storage piston 11 moves upward against the compression spring 14 and the pressure in the storage space 24 increases in accordance with the spring characteristic of the compression spring 14 . Through the upper edge 25 of the accumulator piston 11 , an adjustable switch 26 (for example a proximity switch) is controlled, which switches the geared motor 17 directly or via an electrical contactor and switches on when the pressure drops again. The switch 26 can be steplessly brought into the position 27 shown in broken lines. As a result, the pressure of the liquid in the storage space 24 can be changed within certain limits. Through the bore 28 , the liquid is supplied to the consumer (example, a dispensing gun).

Der Arbeitskolben 6 und der Speicherkolben 11 sind nur auf der Kolbenstange 2 radial geführt und haben soviel Spiel im Gehäuse 1, daß dort keine mechanische Reibung auftritt. Die Abdich­ tung gegen das Gehäuse 1 erfolgt ausschließlich über die Dichtringe 29 und 30.The working piston 6 and the storage piston 11 are guided radially only on the piston rod 2 and have so much play in the housing 1 that there is no mechanical friction. The sealing device against the housing 1 takes place exclusively via the sealing rings 29 and 30 .

Anstelle einer Exzenter-Kolbenpumpe kann auch eine Kolbenpumpe mit Kurbeltrieb verwendet werden.Instead of an eccentric piston pump, too a piston pump with crank drive used will.

Claims (5)

1. Kolbenpumpe mit Druckspeicher, dadurch gekenn­ zeichnet, daß der Kolben (6) der Kolbenpumpe und der Speicherkolben (11) hintereinander koaxial auf der gleichen Kolbenstange (2) ge­ lagert sind.1. Piston pump with pressure accumulator, characterized in that the piston ( 6 ) of the piston pump and the storage piston ( 11 ) are one behind the other coaxial on the same piston rod ( 2 ). 2. Kolbenpumpe nach Anspruch 1, dadurch gekenn­ zeichnet, daß der Kolben (6) und der Speicher­ kolben (11) radial nur auf der Kolbenstange (2) geführt sind und Spiel gegen das Gehäuse (1) haben, so daß zwischen dem Kolben (6) und dem Speicherkolben (11) keine mechanische Reibung gegen das Gehäuse (1) auftritt, und die Ab­ dichtung nur durch die Dichtringe (29) und (30) erfolgt.2. Piston pump according to claim 1, characterized in that the piston ( 6 ) and the accumulator piston ( 11 ) are guided radially only on the piston rod ( 2 ) and have play against the housing ( 1 ), so that between the piston ( 6 ) and the accumulator piston ( 11 ) there is no mechanical friction against the housing ( 1 ), and the seal is made only by the sealing rings ( 29 ) and ( 30 ). 3. Kolbenpumpe nach Anspruch 1, dadurch gekenn­ zeichnet, daß zur Einstellung des Druckes im Speicherraum (24) ein axial verschiebbarer Schalter (26) angeordnet ist.3. Piston pump according to claim 1, characterized in that an axially displaceable switch ( 26 ) is arranged to adjust the pressure in the storage space ( 24 ). 4. Kolbenpumpe nach Anspruch 1, dadurch gekenn­ zeichnet, daß der Antrieb des Kolbens (6) durch den Getriebemotor (17) über die Exzenterschei­ be (18) und die Kolbenstange (2) erfolgt.4. Piston pump according to claim 1, characterized in that the piston ( 6 ) is driven by the geared motor ( 17 ) via the eccentric disc ( 18 ) and the piston rod ( 2 ). 5. Kolbenpumpe nach Anspruch 1, dadurch gekenn­ zeichnet, daß die zu fördernde Flüssigkeit aus dem Arbeitsraum (7) über das Ventil (21) und die Bohrungen (22) und (23) der Kolbenstange (2) in den Speicherraum (24) gelangt.5. Piston pump according to claim 1, characterized in that the liquid to be pumped from the working chamber ( 7 ) via the valve ( 21 ) and the bores ( 22 ) and ( 23 ) of the piston rod ( 2 ) gets into the storage space ( 24 ) .
DE19914122523 1991-07-08 1991-07-08 Piston pump with a coaxial pressure reservoir - - compact arrangement of two pistons on a common piston rod Withdrawn DE4122523A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19914122523 DE4122523A1 (en) 1991-07-08 1991-07-08 Piston pump with a coaxial pressure reservoir - - compact arrangement of two pistons on a common piston rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914122523 DE4122523A1 (en) 1991-07-08 1991-07-08 Piston pump with a coaxial pressure reservoir - - compact arrangement of two pistons on a common piston rod

Publications (1)

Publication Number Publication Date
DE4122523A1 true DE4122523A1 (en) 1993-01-14

Family

ID=6435654

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19914122523 Withdrawn DE4122523A1 (en) 1991-07-08 1991-07-08 Piston pump with a coaxial pressure reservoir - - compact arrangement of two pistons on a common piston rod

Country Status (1)

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DE (1) DE4122523A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999019193A1 (en) * 1997-10-15 1999-04-22 Continental Teves Ag & Co. Ohg Device for storing and delivering fluid under pressure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE927236C (en) * 1951-07-10 1955-05-02 Martin Vermoehlen Apparatus for automatic monitoring and control of the liquid level in containers
DE2246246A1 (en) * 1971-09-22 1973-03-29 Aro Corp PUMP FOR FLUID
US3945772A (en) * 1973-05-25 1976-03-23 Unitas S.A. Pumps for transferring small quantities of dosed liquids
DE2204564B2 (en) * 1972-02-01 1980-05-22 Wilhelm Keller Gmbh & Co Kg, 7401 Nehren Oil pressure pump for central heating system - has plunger consisting of flat disc with central tubular spigot and includes pressure accumulator
DE3248364A1 (en) * 1981-12-28 1983-07-14 Ricoh Co., Ltd., Tokyo Piston pump
DE8712822U1 (en) * 1987-09-23 1987-11-12 Bohlen, Uwe, 2352 Bordesholm Device for switching a sump pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE927236C (en) * 1951-07-10 1955-05-02 Martin Vermoehlen Apparatus for automatic monitoring and control of the liquid level in containers
DE2246246A1 (en) * 1971-09-22 1973-03-29 Aro Corp PUMP FOR FLUID
DE2204564B2 (en) * 1972-02-01 1980-05-22 Wilhelm Keller Gmbh & Co Kg, 7401 Nehren Oil pressure pump for central heating system - has plunger consisting of flat disc with central tubular spigot and includes pressure accumulator
US3945772A (en) * 1973-05-25 1976-03-23 Unitas S.A. Pumps for transferring small quantities of dosed liquids
DE3248364A1 (en) * 1981-12-28 1983-07-14 Ricoh Co., Ltd., Tokyo Piston pump
DE8712822U1 (en) * 1987-09-23 1987-11-12 Bohlen, Uwe, 2352 Bordesholm Device for switching a sump pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999019193A1 (en) * 1997-10-15 1999-04-22 Continental Teves Ag & Co. Ohg Device for storing and delivering fluid under pressure

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Legal Events

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8139 Disposal/non-payment of the annual fee