EP0976927A2 - Dosiergerät oder Titriergerät, insbesondere Bürette - Google Patents
Dosiergerät oder Titriergerät, insbesondere Bürette Download PDFInfo
- Publication number
- EP0976927A2 EP0976927A2 EP99110770A EP99110770A EP0976927A2 EP 0976927 A2 EP0976927 A2 EP 0976927A2 EP 99110770 A EP99110770 A EP 99110770A EP 99110770 A EP99110770 A EP 99110770A EP 0976927 A2 EP0976927 A2 EP 0976927A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- valve
- pistons
- pump
- burette
- 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- Withdrawn
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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2042—Valves
- F04B1/205—Cylindrical
Definitions
- the invention relates to a metering device or titration device, in particular a burette.
- the object of the invention is a metering device or titration device, in particular a Burette to propose with which a continuous fluid delivery possible is.
- the dosing device or titration device or the burette is continuously conveyed Pump or dosing pump marked, the several pistons and one Has valve control.
- the pistons which can also be designed as plunger pistons, are by a Drive device, preferably a shaft or drive shaft, in their respective Cylinders reciprocable, in such a way that a certain movement the drive device or rotation of the shaft each have the same delivery rate corresponds to the pump.
- the valve control device which preferably as Valve disc can be configured stands with the drive device or shaft (Drive shaft) in operative connection. It controls the suction lines and pressure lines the cylinder.
- the valve control device or valve disk is with the drive device or shaft synchronized so that synchronization between the valve control device or valve disc on the one hand and drive device or shaft on the other hand, it is guaranteed.
- valve control device or valve disc is connected to the drive device or shaft.
- the valve control device or valve disc can be designed as a separate component, which with the drive device or shaft is connected. However, it can also be used with the drive device or shaft be made in one piece.
- the valve control device or valve disk opens and closes the respective one Suction line and pressure line of the respective cylinder.
- the opening and closing the suction lines and pressure lines are controlled so that the pumping or dosing liquid during the suction stroke of the respective Piston can flow into the respective cylinder through the respective suction line and that this liquid through during the pressure stroke of the respective piston the respective pressure line can flow out of the respective cylinder.
- a forced valve control is effected in this way.
- Self-controlling valves each have a valve seat and a spring-loaded valve body are not available.
- each with a guideway is operatively connected to each of the pistons.
- the Control disc controls the movement of the pistons. Since the control disc with the shaft is connected, it is ensured that the movement of the piston with the Movement or rotation of the shaft is synchronized.
- the control disc can be used as separate component be formed and connected to the shaft. But it is also possible to form the control disc in one piece with the shaft.
- the guideway on each of the pistons is preferably formed as a groove into which the Control disc engages.
- the shaft (Drive shaft) rotatably mounted in a housing and with a pump block is connected and that the housing is provided with a control disc which one guideway, preferably a groove, in operative connection on each of the pistons stands.
- the valve control device or valve disc is stationary in operative connection with the drive device and is the valve control device or valve disc synchronized with the drive device, so that a Synchronization between the valve control device or valve disk on the one hand and the drive device on the other hand, it is guaranteed.
- the active connection or synchronization is achieved in that the valve control device or valve disc is connected to the housing and that the control disc is also connected to the housing is connected so that between the valve control device or valve disc and control disc no relative movement takes place.
- valve control device or The valve disc and control disc are each fixed or fixed to the housing. Preferably runs the central axis of the shaft or drive shaft and thus also the pump block, the valve disc and the control disc horizontally. Further is the control disc is preferably designed such that the respective conveying piston reaches its maximum pressure stroke when the associated cylinder of the Pump blocks is in the top position '.
- valve disc a first semi-circular, extending over a little more than 180 ° Has a passage area and a second semicircular passage area, which extends over a little less than 180 ° and that to the first Passage area is concentric.
- the semicircular passageways are spaced apart.
- the second semicircular passage area can have a greater distance from the center axis than the first semicircular Passage area.
- the semicircular passageways work with the suction channels and pressure channels of the cylinders.
- the invention can be applied in particular to bottle-top laboratory devices with bottle top dispensers, bottle top titrators and bottle top burettes.
- the continuously pump can be operated by hand operate. However, it is also possible to provide engine operation.
- Fig. 1 shows a section along the line A-B in Fig. 2c.
- the continuously promoting Pump has a pump block 1 in which three cylinders 2, 3, 4 by each 120 ° are arranged around the central axis 5.
- each cylinder 2, 3, 4 is one piston each reciprocally guided. 1 are the pistons 6 and 8, which are located in cylinders 2 and 4.
- a drivable shaft 9 is also rotatably mounted on the a control disc 10 is arranged.
- the control disk 10 engages with its outer area in corresponding grooves 11, 13 in the piston rods 14, 16 of the pistons 6, 8 (the piston arranged in the cylinder 3 also has a corresponding one the piston rod protruding into the outer area of the Control disc 10 protrudes).
- the control disk 10 can be seen in FIG. 1 Way inclined relative to the central axis 5 of the shaft 9, so that at one Rotation of the shaft 9 and with it the control disk 10, the pistons 6 and 8 and the in the cylinder 3 pistons a reciprocating stroke To run.
- the pump block 1 is on the opposite side of the piston rods 14, 16 Side firmly connected to an inlet / outlet flange 17, the suction port 18th and has a pressure port 19.
- the suction port 18 is circular Suction channel 20 connected.
- the pressure port 19 is circular Pressure channel 21 connected.
- valve disk 22 Between the pump block 1 and the inlet / outlet flange 17 is a valve disk 22 arranged, which is rotatably connected to the shaft 9 and the first semicircular passage area 23 and a second semicircular Passage area 24 has.
- the passage areas 23, 24 each run concentric to the central axis 5.
- the first semicircular passage area 23 extends over an angular range of slightly more than 180 °. He points the same Distance from the central axis 5 as the suction channel 20.
- the second semicircular Passage area 24 is to the central axis 5 and the first semicircular Passage area 23 concentric. Its distance from the center axis 5 is larger than that of the first semicircular passage area 23; it is exactly as large as the distance of the pressure channel 21 from the central axis 5.
- Valve disc 22 has the same distance from the central axis 5 as the first Passage area 23 and the suction channel 20. Furthermore, 2, 3, 4 In each case a pressure line 28, 29, 30 is present, which from the respective cylinder 2, 3, 4th leads to the valve disc 22 and the or its opening to the valve disc 22 has the same distance from the central axis 5 as the second passage area 24 and the pressure channel 21.
- liquid can flow through the suction port 18 and flow into the first passage area 23 via the suction channel 20 and through this first passage area 23 into the respective suction line 25, 26, 27 flow so that it can get into the associated cylinder 2, 3, 4.
- liquid can pass through from the respective cylinder 2, 3, 4 the pressure lines 28, 29, 30 flow into the second passage area 24, if this second passage area 24 coincides with the respective Pressure line 28, 29, 30 covered. The liquid passes from the second passage area 24 into the pressure channel 21 and from there into the pressure port 19.
- the passage areas 23 and 24 are arranged in this way and with the shaft 5 and the control disc 10 tuned that the pump delivers continuously.
- the first passage area 23 overlaps with the suction lines 26 and 27 of the cylinders 3 and 4.
- the in the cylinders 3 and 4 located pistons are currently performing a suction stroke.
- the pressure line 28 of the cylinder 2 overlaps with the second passage area 24.
- the one in the cylinder 2 located piston 6 is currently executing a pressure stroke.
- the first passage area 23 extends through the suction lines 25, 26, 27 controls over an angular range of slightly more than 180 °.
- the second Passage area 24, which controls the pressure lines 28, 29, 30, extends over an angular range of slightly less than 180 °.
- the angular ranges of the Passage areas 23 and 24 do not overlap. Between these angular ranges there is rather a slight gap.
- the angular range of the first passage range 23 about 185 °.
- the angular range of the second passage area 24 is approximately 165 °.
- FIG. 3 shows a second embodiment of the invention in a longitudinal section.
- a fixed housing 131 in which a drive shaft 109 is rotatably and drivably mounted.
- the Pump block 101 With the drive shaft 109 is the Pump block 101 connected, in which three cylinders offset by 120 ° each Center axis 105 are arranged. 3 are only the cylinders 102 and 104. In each cylinder there is a piston back and forth movably guided. 3 are pistons 106 and 108 shown, which are located in the cylinders 102 and 104.
- control disk 110 is not with the drive shaft 109 connected, but with the housing 131.
- the control disc 110 is so fixed to the housing or arranged.
- valve disk 122 not with the drive shaft 109 but connected to the housing 131 (in the drawing of FIG. 3 for reasons of simplification not shown), so arranged fixed to the housing or.
- control disk 110 also engages with its Outside in corresponding grooves in the piston rods 114, 116 of the pistons 106, 108 (also the piston not shown in FIG. 3 has a corresponding one Piston rod with a corresponding groove in which the outer area the control disk 110 protrudes).
- the control disk 110 is shown in FIG. 3 Way inclined relative to the central axis 5, so that the pistons a Carry out reciprocating stroke movement.
- valve disk Since the valve disk is fixed in the embodiment according to FIG. 3, is a Inlet / outlet flange not required.
- the suction port and the pressure port can in the embodiment of Fig. 3 directly to the corresponding openings the valve disc.
- valve disk 122 also has a semicircular shape Passage areas which, as in the embodiment of FIGS and 2 are designed so that reference is made to the statements there can. The same applies to the suction lines and pressure lines from the cylinders too the valve disc 122.
- the pump block 101 is driven by the drive shaft connected to it 109 rotated.
- the pistons 106, 108 (and the third in FIG. 3 are not Pistons shown) rotate with the pump block 101 about the central axis 105.
- the valve is controlled by the fixed, housing-fixed valve disk 122.
- the pump block 101 rotates with the piston around the control disk 110.
- Control disk and valve disc are fixed, the drive shaft is with the pump block connected.
- Control disc, valve disc and pump block with pistons are standing so operatively connected that the respective conveying piston its largest Pressure stroke reached when the cylinder of the pump block 101 is in the uppermost position stands. In the illustration in FIG. 3, this is the cylinder 102.
- the one in FIG. 3 Shown embodiment of the metering pump is particularly suitable for horizontal Installation because the metering pump can be vented so easily.
- a continuously pump is created, which is particularly is suitable for a dosing device. It is a continuously promotional Pump with positive valve control. Check valves are not available.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
- Fig. 1
- eine kontinuierlich fördernde Pumpe für ein Dosiergerät, ein Titriergerät oder eine Bürette in einer Schnittansicht, nämlich in einem Längsschnitt, und
- Fig. 2
- verschiedene Querschnitte durch die kontinuierlich fördernde Pumpe, nämlich
- Fig. 2a
- einen Querschnitt durch den Ein-/Auslaßflansch,
- Fig. 2b
- einen Querschnitt durch die Ventilscheibe,
- Fig. 2c
- einen Querschnitt durch den Pumpenblock und
- Fig. 3
- einen Längsschnitt durch eine zweite Ausführungsform mit einem feststehenden Gehäuse, daß eine Ventilscheibe und eine Steuerscheibe aufweist und in dem die Antriebswelle drehbar gelagert und mit einem Pumpenblock verbunden ist.
Claims (4)
- Dosiergerät oder Titriergerät, insbesondere Bürette,
gekennzeichnet durch
eine kontinuierlich fördernde Pumpe, die mehrere Kolben (6, 8; 106, 108) aufweist, die durch eine Antriebseinrichtung, vorzugsweise eine Welle (9) in ihren jeweiligen Zylindern (2, 3, 4; 102, 104) derart hin- und herbewegbar sind, daß einer bestimmten Bewegung der Antriebseinrichtung bzw. Drehung der Welle (9) jeweils dieselbe Fördermenge der Pumpe entspricht, und die eine Ventilsteuereinrichtung aufweist, vorzugsweise eine Ventilscheibe (22; 122), die mit der Antriebseinrichtung bzw. Welle (9) in Wirkverbindung steht und die die Saugleitungen (25, 26, 27) und Druckleitungen (28, 29, 30) der Zylinder (2, 3, 4; 102, 104) steuert. - Dosiergerät oder Titriergerät, insbesondere Bürette, nach Anspruch 1, dadurch gekennzeichnet, daß die Welle (9) mit einer Steuerscheibe (10) versehen ist, die mit jeweils einer Führungsbahn, vorzugsweise einer Nut (11, 13), an jedem der Kolben (6, 8) in Wirkverbindung steht.
- Dosiergerät oder Titriergerät, insbesondere Bürette, nach Anspruch 1, dadurch gekennzeichnet, daß die Welle (109) in einem Gehäuse (131) drehbar gelagert und mit einem Pumpenblock (101) verbunden ist und daß das Gehäuse (131) mit einer Steuerscheibe (110) versehen ist, die mit jeweils einer Führungsbahn, vorzugsweise einer Nut, an jedem der Kolben (106, 108) in Wirkverbindung steht.
- Dosiergerät oder Titriergerät, insbesondere Bürette, nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Ventilscheibe (22; 122) einen ersten halbkreisförmigen, sich über etwas mehr als 180° erstreckenden Durchgangsbereich (23) aufweist sowie einen zweiten halbkreisförmigen Durchgangsbereich (24), der sich über etwas weniger als 180° erstreckt und der zum ersten Durchgangsbereich (23) konzentrisch ist.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833735 | 1998-07-27 | ||
DE19833735 | 1998-07-27 | ||
DE19854479 | 1998-11-25 | ||
DE19854479A DE19854479A1 (de) | 1998-07-27 | 1998-11-25 | Dosiergerät oder Titriergerät, insbesondere Bürette |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0976927A2 true EP0976927A2 (de) | 2000-02-02 |
EP0976927A3 EP0976927A3 (de) | 2000-10-04 |
Family
ID=26047712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99110770A Withdrawn EP0976927A3 (de) | 1998-07-27 | 1999-06-04 | Dosiergerät oder Titriergerät, insbesondere Bürette |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0976927A3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016124288A1 (de) * | 2015-02-03 | 2016-08-11 | Robert Bosch Gmbh | Schrägscheibenmaschine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB228368A (en) * | 1924-03-03 | 1925-02-05 | Arthur Stocker | Improvements in and relating to pumps |
GB294083A (en) * | 1928-02-01 | 1928-07-19 | Tubize Artificial Silk Company | Improvements in multicylinder pumps |
US1842569A (en) * | 1929-10-26 | 1932-01-26 | Jens P Nielsen | Pump |
FR764414A (fr) * | 1932-11-29 | 1934-05-22 | Distributeur pour pompes à plusieurs cylindres | |
WO1996029515A1 (en) * | 1995-03-20 | 1996-09-26 | Micropump, Inc. | Multiple piston pump |
US5988987A (en) * | 1996-08-28 | 1999-11-23 | Fia Solutions, Inc. | Method for merging and/or ratio blending aliquant |
-
1999
- 1999-06-04 EP EP99110770A patent/EP0976927A3/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
None |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016124288A1 (de) * | 2015-02-03 | 2016-08-11 | Robert Bosch Gmbh | Schrägscheibenmaschine |
Also Published As
Publication number | Publication date |
---|---|
EP0976927A3 (de) | 2000-10-04 |
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Effective date: 20010405 |