EP0718040B1 - Lackförderpumpe - Google Patents
Lackförderpumpe Download PDFInfo
- Publication number
- EP0718040B1 EP0718040B1 EP95119480A EP95119480A EP0718040B1 EP 0718040 B1 EP0718040 B1 EP 0718040B1 EP 95119480 A EP95119480 A EP 95119480A EP 95119480 A EP95119480 A EP 95119480A EP 0718040 B1 EP0718040 B1 EP 0718040B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paint
- piston
- pistons
- pump according
- conveying pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003973 paint Substances 0.000 title claims description 78
- 239000012530 fluid Substances 0.000 claims description 16
- 239000012811 non-conductive material Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000000926 separation method Methods 0.000 description 8
- 239000004922 lacquer Substances 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000003599 detergent Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000012777 electrically insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000004851 dishwashing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports
- F04B7/045—Two pistons coacting within one cylinder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
- B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
Definitions
- the invention relates to a paint feed pump for promotion made of electrically conductive paint, with a housing electrically non-conductive material for receiving at least a cylinder in which at least one piston made of electrical non-conductive material is guided as a delivery piston for the conductive paint is used, the at least one cylinder at least in regions made of electrically non-conductive material is formed, as well as with an inlet and an outlet for the paint that can be connected to the at least one cylinder are.
- Such a paint feed pump is known from FR-A-2 671 742.
- a single cylinder in which a simple one Piston works. Through a bore in the piston, its circumferential or tread a liquid from a storage container be fed. This liquid is a detergent or dishwashing detergent with which the cylinder tread be cleaned when the paint supply is interrupted should.
- Such detergents are electrically highly conductive and can not as a release agent in the sense of electrical insulation act to a high voltage potential in the area of paint delivery to keep away from other parts of the system.
- each piston is formed as a double piston from two single pistons, between a delivery chamber within the relevant cylinder is formed. This is experienced by relative during the work cycle different axial displacements of the associated individual pistons Volume changes and especially a volume reduction for delivering the hydraulic fluid to a delivery line.
- the pistons of the individual conveyor devices work out of phase so as to be largely continuous To achieve flow rate.
- a double piston pump is known, two of which Single pistons either with a single crank but with their own Main connecting rods, links and piston connecting rods or but from two parallel crankshafts with constant phase shift are driven.
- This double piston pump is also not for conveying paint and for use in the event of potential differences provided or suitable.
- At least accordingly two pistons are provided, each as a double piston with each other facing, spaced piston end faces are formed, the one with the common cylinder Form a cavity that receives the paint to be conveyed, which Cavity is movable from the inlet to the outlet, the at least two pistons are actuated cyclically offset and the running surfaces of each cylinder with an electrically non-conductive, paint compatible fluid are covered that as Separation fluid between different electrical potentials serves.
- the Double piston provided a crank mechanism, advantageously the articulation of the single pistons of each double piston by means of Piston rods of different lengths are made with the Crank drive are connected.
- piston rods of different lengths can also piston rods of the same length are provided on a crank mechanism are articulated with different crank strokes.
- the single pistons of each double piston are different Have hub. This ensures that the Piston faces and the cylinder wall limited cavity has a variable volume. This has the consequence that For example, a negative pressure arises when the paint is fed in sucks the amount of paint to be conveyed and that at the paint drain Overpressure is built up from the amount of paint to be conveyed Cavity presses.
- each piston designed as a double piston Lacquer in the of the piston faces of the double pistons and the Cylinder wall delimited cavity from the inlet to the outlet promotes where the amount of paint conveyed due to relative movement the single piston of the double piston towards each other and therefore more conditional Volume reduction of the cavity from these into the drain exit.
- Another advantageous embodiment of the invention provides that the cylinders for each double piston, at least in some areas are provided with an electrically insulating lining that expediently each formed as a cylinder sleeve and axially displaceable are arranged.
- the axial displacement of the cylinder liner can be advantageous be designed so that it can be controlled and so be used to shut off the inlet for the paint can.
- the axially displaceable lining surrounds the piston surfaces and so their contact with the one coming from the paint inlet Lacquer prevented.
- the design of the paint feed pump according to the invention also has the advantage that color changes take place without great delays can, since the cleaning and Flushing can be done quickly, using the required amount of cleaning or rinsing fluid in environmentally friendly Way is very low.
- a paint feed pump 10 is shown schematically in FIG. 1 shown, which in a housing 12 a total of four cylinders 14.1 to 14.4 with pistons 16.1 to 16.4 guided therein.
- the pistons 16.1 to 16.4 can be seen, for example, from FIG. 2 is, as a double piston with directed against each other Piston faces formed.
- the pistons 16.1 to 16.4 offset positions the piston 16.1 is in the cylinder 14.1 at its top dead center, that means at the paint inlet 18.
- the piston 16.4 is located against it at bottom dead center, that is, during the paint drain 20, during the two pistons 16.2 and 16.3 offset each other are in an intermediate position.
- the mode of action this feed pump 10 is comparatively easy to understand since the individual pistons 16.1 to 16.4 successively each from top dead center, where they take up a certain amount of paint, move to bottom dead center. Because of here In this way, four-fold pistons become continuous promoted a certain amount of paint that 20 emerges largely uniformly.
- crank drives are provided, which over Piston rods act on pistons 16.1 to 16.4.
- the first piston 16.1 which, as shown in Fig. 1, is at top dead center located.
- the pistons 16.1 to 16.4 are each executed as a double piston, the end faces of the Single pistons 15 and 17 together with the Cylinder wall of the cylinder 14.1 to 14.4 each have a cavity 22 limit the amount of paint to be conveyed serves.
- each individual piston is 15 and 17 each with two sealing rings 28, 29 provided axially at a distance from each other on the piston 15, 17 are arranged and serve the annular gap between the Seal pistons 15, 17 and the inner wall of the cylinder 14.
- each Pistons 15 and 17 are in diameter fitted rings 30 made of porous material, preferably made of ceramic, which is permeable to Separation fluid, which is supplied via a line 32.
- a separation fluid white oil is preferred, which is compatible with paints is and has electrically insulating properties.
- the Separating fluid is fed into the piston 15 via the line 32 and distributed over the porous rings 30 there so that it attaches itself the circumferential surface of the piston 15 spreads out and so a closed Sealing film between the piston 15 and the cylinder wall 14 forms. This sealing film prevents voltage breakdown.
- FIG. 3 Another detail that can be seen in FIG. 3 relates to a lining 34, which is designed as a cylinder sleeve is and is arranged axially displaceable.
- the sliding sleeve 34 axially movable, so that they are at the appropriate Position of the piston 15, the inlet opening 18 for the pumped Paint in the area of the cylinder 14 covers, so that the Separating fluid does not wet the peripheral surface of the piston 15 with the electrically conductive paint coming into contact here.
- Piston 16 When acting on the existing from the individual pistons 15, 17 Piston 16 initially moves the lower individual piston 17 below, so that the cavity 22 increases and with the promotional amount of paint fills. Then follows with the same Speed the movement of the piston assembly 16 to the bottom dead center, not shown here, where the also Not shown drain 20 is located, now the upper single piston 15 its distance to the lower individual piston 17 again reduced so that the amount of paint in the cavity 22 is pushed out into the drain 20 through which the Paint leaves the housing 12.
- the corresponding area around the bottom dead center with the there is, as can be seen from Fig. 2, in designed in the same way and also has a sliding sleeve 34, which also serves the same purpose of cordoning off the Piston peripheral surfaces compared to the electrically conductive paint Has.
- the sliding sleeves 34 can advantageously by means of Compression springs 36 are loaded into the closed position shown in FIG. 3 from which they can only be activated when the Pistons 15, 17 can be moved away.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Description
- Fig. 1
- eine schematische Skizze einer Lackförderpumpe gemäß der Erfindung im Längsschnitt
- Fig. 2
- eine auszugsweise Wiedergabe einer Kolben-Zylinder-Anordnung gemäß Fig. 1, zusätzlich mit Kurbeltrieb zur Beaufschlagung der Kolben
- Fig. 3
- eine vergrößerte Wiedergabe der Einzelheit X in Fig. 2.
Claims (12)
- Lackförderpumpe (10) zur Förderung von elektrisch leitfähigem Lack, mit einem Gehäuse (12) aus elektrisch nicht leitendem Material zur Aufnahme von wenigstens einem Zylinder (14.1 bis 14.4), in dem wenigstens ein Kolben (16.1 bis 16.4) aus elektrisch nichtleitfähigem Material geführt ist, der als Förderkolben für den leitfähigen Lack dient, wobei der wenigstens eine Zylinder (14.1 bis 14.4) zumindest bereichsweise aus elektrisch nichtleitfähigem Material gebildet ist, sowie mit je einem Zulauf (18) und einem Ablauf (20) für den Lack, die mit dem wenigstens einen Zylinder (14.1 bis 14.4) verbindbar sind, dadurch gekennzeichnet, daß wenigstens zwei Zylinder (14.1 bis 14.4) und zwei Kolben (16.1 bis 16.4) vorgesehen sind, die jeweils als aus zwei Einzelkolben (15 und 17) bestehende Doppelkolben mit einander zugewandten, im Abstand zueinander befindlichen Kolbenstirnflächen ausgebildet sind, die mit dem gemeinsamen Zylinder (14.1 bis 14.4) einen Hohlraum (22) bilden, . der den zu fördernden Lack aufnimmt und von dem Zulauf (18) zu dem Ablauf (20) bewegbar ist, daß die wenigstens zwei Kolben (16.1 bis 16.4) zyklisch zueinander versetzt betätigt sind und daß die Laufflächen jeden Zylinders (14.1 bis 14.4) mit einem elektrisch nichtleitfähigem lackverträglichen Fluid (35) bedeckt sind, das als Trennfluid zwischen unterschiedlichen elektrischen Potentialen dient.
- Lackförderpumpe nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens vier Zylinder (14.1 bis 14.4) und vier Doppelkolben (16.1 bis 16.4) vorgesehen sind.
- Lackförderpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zur Betätigung der Doppelkolben (16.1 bis 16.4) ein Kurbeltrieb (24, 25, 26, 27) vorgesehen ist.
- Lackförderpumpe nach Anspruch 3, dadurch gekennzeichnet, daß die zwei Einzelkolben (15, 17) eines jeden Doppelkolbens (16.1 bis 16.4) mittels Kolbenstangen (25, 27) von unterschiedlicher Länge beaufschlagt sind, die mit dem Kurbeltrieb (24, 26) verbunden sind.
- Lackförderpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Einzelkolben (15, 17) jedes Doppelkolbens (16.1 bis 16.4) unterschiedlichen Hub aufweisen.
- Lackförderpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß jeder als Doppelkolben ausgebildete Kolben (16.1 bis 16.4) den Lack in dem von den Kolbenstirnflächen der Einzelkolben (15, 17) und der Innenwand des zugehörigen Zylinders (14.1 bis 14.4) begrenzten Hohlraum (22) vom Zulauf (18) zum Ablauf (20) fördert, wo die geförderte Lackmenge infolge relativer Bewegung der Einzelkolben (15, 17) aufeinander zu und dadurch bedingter Volumenverringerung des Hohlraums (22) aus dem Hohlraum (22) in den Ablauf (20) austritt.
- Lackförderpumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Zylinder (14.1 bis 14.4) für jeden Doppelkolben (16.1 bis 16.4) zumindest bereichsweise mit einer elektrisch isolierenden Auskleidung (34) versehen sind.
- Lackförderpumpe nach Anspruch 7, dadurch gekennzeichnet, daß die Auskleidung (34) als Zylinderhülse ausgebildet ist, die axial verschieblich angeordnet ist.
- Lackförderpumpe nach Anspruch 8, dadurch gekennzeichnet, daß die axialverschiebliche Auskleidung (34) zur Absperrung des Zulaufs (18) beziehungsweise des Ablaufs (20) für den Lack dient und zu diesem Zweck ansteuerbar ist.
- Lackförderpumpe nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die axialverschiebliche Auskleidung (34) die Kolbenlaufflächen jeweils umgibt und so deren Kontakt mit dem Lack verhindert.
- Lackförderpumpe nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß wenigstens einer der beiden Einzelkolben (15, 17) jedes Doppelkolbens (16.1 bis 16.4) an seiner Lauffläche einen Auslaß aufweist, der strömungsmäßig mit einer Einspeiseleitung (35) für das Trennfluid (35) verbunden ist und zu dessen Nachspeisung dient.
- Lackförderpumpe nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Hubbewegung der Doppelkolben (16.1 bis 16.4) jeweils von einem oberen Totpunkt zu einem unteren Totpunkt und zurück vorgesehen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4444671 | 1994-12-15 | ||
DE4444671A DE4444671A1 (de) | 1994-12-15 | 1994-12-15 | Lackförderpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0718040A1 EP0718040A1 (de) | 1996-06-26 |
EP0718040B1 true EP0718040B1 (de) | 2002-11-27 |
Family
ID=6535869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95119480A Expired - Lifetime EP0718040B1 (de) | 1994-12-15 | 1995-12-11 | Lackförderpumpe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0718040B1 (de) |
DE (2) | DE4444671A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19620577A1 (de) * | 1996-05-22 | 1997-11-27 | Abb Research Ltd | Kolbenventil |
DE19756488A1 (de) * | 1997-12-18 | 1999-07-01 | Lactec Gmbh | Verfahren und Vorrichtung zum Isolieren eines elektrisch leitenden Strömungsmediums |
DE102009031463A1 (de) * | 2009-07-01 | 2011-01-05 | Eisenmann Anlagenbau Gmbh & Co. Kg | Kolbendosierer für fluide Medien und System zum Beschichten von Gegenständen |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE939244C (de) * | 1951-11-02 | 1956-02-16 | Benno Fiala-Fernbrugg | Doppelkolbenpumpe, insbesondere fuer hohe Drehzahlen |
US3122320A (en) | 1958-03-20 | 1964-02-25 | Ford Motor Co | Method for filling electrically charged receptacle |
US4023469A (en) * | 1972-08-09 | 1977-05-17 | United States Steel Corporation | Piston and piston rod construction for pumps and method of flushing piston-type pumps |
DK137344B (da) * | 1974-06-27 | 1978-02-20 | Niels Brundbjerg | Stempelpumpe især til pumpning af beton. |
DE3038525C2 (de) * | 1980-10-11 | 1982-10-07 | Drägerwerk AG, 2400 Lübeck | Dosierpumpe |
DE3709899A1 (de) * | 1986-03-26 | 1987-10-01 | Neuberg Co Ltd | Hydraulikeinrichtung |
FR2617541A1 (fr) * | 1987-06-30 | 1989-01-06 | Europ Composants Electron | Dispositif automatique de coulage d'une resine avec un dosage volumetrique de precision |
FR2654365B1 (fr) * | 1989-11-14 | 1992-02-21 | Sames Sa | Installation d'application de produit de revetement conducteur, par voie electrostatique. |
DE4013942A1 (de) * | 1990-04-30 | 1991-10-31 | Behr Industrieanlagen | Anlage zum serienweisen beschichten von werkstuecken mit leitfaehigem beschichtungsmaterial |
US5255856A (en) * | 1990-11-08 | 1993-10-26 | Honda Giken Kogyo Kaubshiki Kiasha | Electrostatic spray painting apparatus |
GB2252262B (en) * | 1991-01-22 | 1994-08-31 | Honda Motor Co Ltd | Structure for preventing current from leaking out of devices for electrostatic spray coating |
ES2121855T3 (es) * | 1992-05-15 | 1998-12-16 | Trallfa Robot As | Dispositivo dosificador de pintura para un sistema para pintar a pistola de control programado. |
DE4308467A1 (de) * | 1992-10-28 | 1994-05-05 | Herbert Dr Funke | Hochdruckpumpe zur Flüssigkeits-Feindosierung |
DE9308066U1 (de) * | 1993-02-20 | 1993-09-09 | Lincoln GmbH, 69190 Walldorf | Kolbenpumpe |
-
1994
- 1994-12-15 DE DE4444671A patent/DE4444671A1/de not_active Withdrawn
-
1995
- 1995-12-11 EP EP95119480A patent/EP0718040B1/de not_active Expired - Lifetime
- 1995-12-11 DE DE59510475T patent/DE59510475D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59510475D1 (de) | 2003-01-09 |
DE4444671A1 (de) | 1996-06-20 |
EP0718040A1 (de) | 1996-06-26 |
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