EP1574261A2 - Pulverförderpumpe - Google Patents
Pulverförderpumpe Download PDFInfo
- Publication number
- EP1574261A2 EP1574261A2 EP05004575A EP05004575A EP1574261A2 EP 1574261 A2 EP1574261 A2 EP 1574261A2 EP 05004575 A EP05004575 A EP 05004575A EP 05004575 A EP05004575 A EP 05004575A EP 1574261 A2 EP1574261 A2 EP 1574261A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- piston
- working space
- feed pump
- powder feed
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1404—Arrangements for supplying particulate material
- B05B7/1459—Arrangements for supplying particulate material comprising a chamber, inlet and outlet valves upstream and downstream the chamber and means for alternately sucking particulate material into and removing particulate material from the chamber through the valves
Definitions
- the invention relates to a powder feed pump, in particular for a powder coating device, according to the preamble of claim 1.
- Powder feed pump known in a coating plant can be used as a coating agent to promote serving powders.
- This known powder feed pump has a mechanical over a piston rod powered reciprocating piston, which in an upward movement generates a vacuum in a working space of the powder feed pump, causing the powder through a powder inlet into the working space the powder feed pump is sucked. Subsequently then conveying air is blown into the working space, whereby the powder in the working space via a powder outlet is ejected.
- a disadvantage of this known powder feed pump is the expensive mechanical drive, which passes through a piston rod Pneumatic cylinder takes place.
- the invention is therefore based on the object, in the previously described known powder feed pump the drive to simplify.
- the invention comprises the general technical teaching, the Actuate piston pneumatically directly, so that on a piston rod for the mechanical connection of the piston to the drive unit (e.g., pneumatic cylinders) can.
- the drive unit e.g., pneumatic cylinders
- Another advantage of the drive according to the invention exists in that the number and mass of the moving parts is smaller, reducing the susceptibility to wear and the vibrations are reduced.
- the pneumatic drive of the piston is a Control space provided, wherein the piston has a boundary surface of the control room forms.
- the pressure in the control room is adjustable to a corresponding pressure on the Exercise piston and move it accordingly.
- control room and the working space of the powder feed pump here on arranged opposite sides of the piston, wherein the Piston separates the control room from the working space.
- An increase in pressure in the control room in this case thus causes a downward movement of the piston and a corresponding reduction in the Workspace volume, whereas a pressure reduction in the Control chamber causes an upward movement of the piston and to a corresponding increase in the working space volume leads.
- the Control room and the work space on the other hand on the same page arranged the piston so that the control room and the working space preferably on the same end face of the piston Act.
- the working space may be the control room surrounded annular, wherein the control chamber by a cylindrical Wall is separated from the work space.
- the piston in this case has two axially projecting on one side and coaxially arranged part pistons, between which a annular groove extends, in which the cylindrical wall between the working space and the control room engages.
- the Arrangement of the working space on the outside of the control room is advantageous because it creates a larger workspace volume results, resulting in a correspondingly larger flow leads.
- For pneumatic drive can be in the or the control rooms an overpressure port open to an overpressure in the Create control chamber and move the piston accordingly, whereby the work space volume changed accordingly becomes. If the control room on the opposite of the work space Side of the piston is arranged, so leads a Pressure increase in the control room to a downward movement of the Piston and a corresponding reduction in the working space volume. If the control room on the other hand on the same Side is located, as the working space, so performs an increase in pressure in the control room through the pressure connection to a Upward movement of the piston and a corresponding increase the workspace volume.
- a vacuum connection lead to reduce the pressure in the control room, resulting in a corresponding piston movement and a Change in the workspace volume leads.
- a vacuum connection lead to reduce the pressure in the control room, resulting in a corresponding piston movement and a Change in the workspace volume leads.
- a reduction of the pressure in the control room to an upward movement of the piston and a corresponding Enlargement of the workspace volume leads to a pressure reduction in the control room against it to a downward movement of the piston and a corresponding Reduction of the workspace volume.
- the pneumatic control of the piston may be within the scope of the invention exclusively by overpressure generation on the done on both sides of the piston. It is however alternative also possible that the pneumatic control of the piston exclusively by a vacuum generation on the opposite Sides of the piston takes place. In addition there is also the possibility of a combination of a vacuum generation with overpressure generation, where negative pressure and overpressure preferably generated on the same side of the piston to move the piston accordingly.
- a conveying air connection is preferably provided, which flows into the working space to conveying air in the Blowing work space and located in the work space and expel previously sucked powders through the powder outlet.
- the conveying air connection and the powder outlet arranged in the working space opposite each other. This offers the advantage that the flow path from the conveying air connection to the powder outlet, the ejection of the powder supported.
- the piston in the working space can also be a vacuum connection lead to the piston after the expulsion of the powder to move out of the workroom and the workspace volume change accordingly. So the piston has to after ejecting initially back down (i.e., in the direction of of the working space) to increase the working space volume reduce, then again powder in the work space can be sucked.
- the upward or downward movement of the piston can also be supported or effected by a spring, wherein the Spring can either push or pull the piston.
- the piston can therefore be connected to a compression or tension spring, which moves the piston to an initial position, if no outer pneumatic pressure acts.
- the spring the piston for sucking the powder upwards (i.e. Direction of the control room), whereas the subsequent one Downward movement of the piston exclusively pneumatically is driven.
- At least one stop is that limits the piston movement to a defined displacement to reach and thereby a predetermined flow rate to achieve.
- the piston may consist of a plastic, which applies elastically to the tread. This is also advantageous because plastic is relatively light, so in the oscillating operation of the piston lower mass forces occur, whereby the vibrations are reduced.
- the piston on its lateral surface in one piece molded sealing lip to powder residues on the tread without stripping a separate piston ring.
- the piston So it can be built like a newt in modern times Coating systems used to clean paint lines becomes.
- the invention is not limited to the above described powder feed pump according to the invention single component is limited, but also a complete one Powder coating plant with such a powder feed pump includes.
- the invention also includes the novel use Such a powder feed pump for powder delivery in a powder coating plant.
- FIG. 1 shows a powder feed pump 1, which used in a powder coating plant can be to a serving as a coating powder 2 from a powder container 3 to one as an application device serving rotary atomizer 4.
- the powder container 3 and the rotary atomizer 4 can in this case be designed conventionally, so that in the following on a detailed description of the powder container 3 and of the rotary atomizer 4 can be dispensed with and in this regard Reference is made to the relevant literature.
- a other application device can be used, such as a powder spray gun.
- the powder feed pump 1 has a working space 5 with a variable working space volume, taking in the work space 5, a powder inlet 6 opens, which via a supply line. 7 and a powder inlet valve 8 connected to the powder container 3 is. With open powder inlet valve 8, the So powder 2 via the supply line 7 and the powder inlet 6 in the working space 5 of the powder feed pump 1 are sucked.
- a powder outlet 9 opens into the working space 5 of Powder feed pump 1, wherein the powder outlet 9 via a discharge line 10 and a powder outlet valve 11 with the rotary atomizer 4 is connected. With the powder outlet valve open 11 so that can be in the working space 5 of the powder feed pump 1 aspirated powder 2 through the powder outlet. 9 ejected and conveyed to the rotary atomizer 4.
- the working space volume of the working space 5 is through a Piston 12 changeable, which can be displaced in the arrow direction in the powder feed pump 1 is arranged.
- the piston 12 is made of an elastic plastic and has on its lateral surface 2 axially spaced sealing lips 13, the powder residues from an associated tread 14th strip.
- the powder feed pump 1 has a control chamber 15th on, on the opposite side of the working space 5 of the piston 12 is arranged.
- a control room 15 opens a port 16, which via a pressure line 17 and a Relief valve 18 is connected to a pressure source.
- connection 16 is via a vacuum line 19 and a vacuum valve 20 connected to a vacuum source, the as well as the overpressure source for simplicity not shown.
- the pressure be set in the control room 15 to the movement of the To control piston 12.
- the pressure relief valve 18 is opened, while the vacuum valve 20 is closed, reducing the pressure in the control room 15 increases accordingly and the piston 12 down emotional.
- piston 12 can be connected to port 21 via a vacuum valve 23 a vacuum connection to be connected to a To generate negative pressure in the working space 5 and the piston 12th by pulling down.
- a vacuum valve 23 a vacuum connection to be connected to a To generate negative pressure in the working space 5 and the piston 12th by pulling down.
- the powder feed pump 1 has a in the control room 15 protruding stop 24 and one in the working space 5 projecting stop 25, wherein the two Stops 24, 25 limit the movement of the piston and thereby a set the defined maximum stroke volume.
- the powder inlet valve 8 and the vacuum valve 20 is opened, whereby air out the control chamber 15 is exhausted, resulting in a corresponding Pressure reduction in the control chamber 15 and an upward movement of the piston 12 leads.
- the upward movement of the piston 12 again leads to a reduction in pressure in the working space 5, whereby the powder 2 from the powder container 3 via the Powder inlet 6 is sucked into the working space 5.
- a special feature of this embodiment is that the piston 12 on the control chamber 15 side facing is connected to two tension springs 26 which on the housing the powder feed pump 1 are attached.
- the two tension springs 26 assist the upward movement of the piston 12 during Aspirate the powder 2 in the working space 5 and take over the upward movement instead of the vacuum.
- FIG. 3 shows a further exemplary embodiment, also largely with the above-described and in the embodiment shown in FIG. 1, so that to avoid repetition largely to the above description is referenced to Figure 1 and for corresponding components the same reference numerals are used.
- a special feature of this embodiment is that the powder feed pump 1 two control rooms 15.1, 15.2 for pneumatic drive of the piston 12, wherein the Control chamber 15.1 on the side facing away from the working space 5 of the piston 12 is disposed while the control chamber 15.2 on the same side of the piston 12 as the working space 5th
- the control room 15.1 can be controlled in the same way be like the control room 15 in Figure 1, so that in this regard, reference is made to the above description becomes.
- control chamber 15.2 by a cup-shaped, cylindrical Wall 27 separated from the working space 5, wherein the working space 5 surrounds the control space 15. 2 annularly.
- the upward movement of the piston 12 is initiated here, by a connection 29 and a pressure relief valve 30th Compressed air is injected into the control chamber 15.2, whereby the piston 12 moves up while the powder. 2 via the powder inlet 6 in the working space 5 sucks.
- the advantage of this embodiment is the fact that the upward movement of the piston 12 for sucking the Powder 2 in the working space 5 with a considerably larger Force can be done as easily in the control room 15.2 create a strong overpressure, whereas the differential pressure when sucking the piston according to Figure 1 to a maximum 1 bar is limited.
Landscapes
- Reciprocating Pumps (AREA)
- Air Transport Of Granular Materials (AREA)
- Coating Apparatus (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
Description
- Figur 1
- eine schematische Darstellung einer erfindungsgemäßen Pulverförderpumpe zur Förderung von Pulver in einer Pulverbeschichtungsanlage,
- Figur 2
- eine Abwandlung der Pulverförderpumpe aus Figur 1 mit Federn zur Unterstützung der Kolbenbewegung sowie
- Figur 3
- ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Pulverförderpumpe.
Claims (20)
- Pulverförderpumpe (1), insbesondere für eine Pulverbeschichtungseinrichtung, miteinem Arbeitsraum (5) mit einem veränderlichen Arbeitsraumvolumen,einem in den Arbeitsraum (5) mündenden Pulvereinlass (6) zum Einsaugen von Pulver (2) in den Arbeitsraum (5),einem aus dem Arbeitsraum (5) ausmündenden Pulverauslass (9) zum Ausstoßen des in dem Arbeitsraum (5) befindlichen Pulvers (2),einem beweglichen Kolben (12), der eine Begrenzungsfläche des Arbeitsraums (5) bildet und das Pulver (2) bei einer Aufwärtsbewegung durch den Pulvereinlass (6) in den Arbeitsraum (5) einsaugt,
der Kolben (12) pneumatisch direkt angetrieben ist. - Pulverförderpumpe (1) nach Anspruch 1, gekennzeichnet durch
einen Steuerraum (15, 15.1, 15.2) zum pneumatischen Antrieb des Kolbens (12), wobei der Kolben (12) eine Begrenzungsfläche des Steuerraums (15, 15.1, 15.2) bildet. - Pulverförderpumpe (1) nach Anspruch 2, dadurch gekennzeichnet, dass der Steuerraum (15, 15.1, 15.2) und der Arbeitsraum (5) auf gegenüber liegenden Seiten des Kolbens (12) angeordnet sind.
- Pulverförderpumpe (1) nach Anspruch 2, dadurch gekennzeichnet, dass der Steuerraum (15, 15.1, 15.2) und der Arbeitsraum (5) auf derselben Seite des Kolbens (12) angeordnet sind.
- Pulverförderpumpe (1) nach Anspruch 4, dadurch gekennzeichnet, dass der Arbeitsraum (5) den Steuerraum (15, 15.1, 15.2) ringförmig umgibt.
- Pulverförderpumpe (1) nach Anspruch 4, dadurch gekennzeichnet, dass der Steuerraum (15, 15.1, 15.2) den Arbeitsraum (5) ringförmig umgibt.
- Pulverförderpumpe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass auf beiden Seiten des Kolbens (12) jeweils ein Steuerraum (15.1, 15.2) angeordnet ist, wobei die beiden Steuerräume (15.1, 15.2) auf die gegenüber liegenden Stirnflächen des Kolbens (12) wirken, um dem Kolben (12) pneumatisch in zwei Richtungen anzutreiben.
- Pulverförderpumpe (1) nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass in den Steuerraum (15, 15.1, 15.2) ein Überdruckanschluss (16, 29) mündet, um den Kolben (12) zu bewegen und das Arbeitsraumvolumen entsprechend zu verändern.
- Pulverförderpumpe (1) nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass in den Steuerraum (15, 15.1, 15.2) ein Unterdruckanschluss (16, 29) mündet, um den Kolben (12) zu bewegen und das Arbeitsraumvolumen entsprechend zu verändern.
- Pulverförderpumpe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in den Arbeitsraum (5) ein Förderluftanschluss (21) mündet, um Förderluft in den Arbeitsraum (5) einzublasen und das in dem Arbeitsraum (5) befindliche Pulver (2) so durch den Pulverauslass (9) auszustoßen.
- Pulverförderpumpe (1) nach Anspruch 10, dadurch gekennzeichnet, dass der Förderluftanschluss (21) und der Pulverauslass (9) in dem Arbeitsraum (5) einander gegenüber liegend angeordnet sind.
- Pulverförderpumpe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in den Arbeitsraum (5) ein Unterdruckanschluss (21, 29) mündet, um den Kolben (12) zu bewegen und das Arbeitsraumvolumen entsprechend zu verändern.
- Pulverförderpumpe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kolben (12) mit mindestens einer Feder (26) verbunden ist, die den Kolben (12) drückt oder zieht.
- Pulverförderpumpe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in dem Arbeitsraum (5) ein Anschlag (25) angeordnet, der die Kolbenbewegung bei einer Abwärtsbewegung begrenzt.
- Pulverförderpumpe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in dem Steuerraum (15, 15.1, 15.2) ein Anschlag (24) angeordnet, der die Kolbenbewegung bei einer Aufwärtsbewegung begrenzt.
- Pulverförderpumpe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kolben (12) im Wesentlichen aus einem elastischen Material besteht.
- Pulverförderpumpe (1) nach Anspruch 16, dadurch gekennzeichnet, dass der Kolben (12) im Wesentlichen aus Kunststoff besteht.
- Pulverförderpumpe (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kolben (12) an seiner Mantelfläche eine einstückig angeformte Dichtlippe (13) aufweist, um Pulverreste ohne einen separaten Kolbenring abzustreifen.
- Pulverbeschichtungsanlage mit einer Pulverförderpumpe (1) nach einem der vorhergehenden Ansprüche.
- Verwendung einer Pulverförderpumpe (1) nach einem der Ansprüche 1 bis 18 zur Pulverförderung in einer Pulverbeschichtungsanlage.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004011445 | 2004-03-09 | ||
DE102004011445A DE102004011445A1 (de) | 2004-03-09 | 2004-03-09 | Pulverförderpumpe |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1574261A2 true EP1574261A2 (de) | 2005-09-14 |
EP1574261A3 EP1574261A3 (de) | 2007-09-26 |
EP1574261B1 EP1574261B1 (de) | 2009-04-29 |
Family
ID=34813624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05004575A Not-in-force EP1574261B1 (de) | 2004-03-09 | 2005-03-02 | Pulverförderpumpe |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1574261B1 (de) |
AT (1) | ATE429978T1 (de) |
DE (2) | DE102004011445A1 (de) |
ES (1) | ES2325770T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1772195A2 (de) * | 2005-10-07 | 2007-04-11 | Nordson Corporation | Steuereinrichtung für eine Pumpe für trockenes partikelförmiges Material |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007011736A1 (de) * | 2007-03-10 | 2008-09-11 | Bayerische Motoren Werke Aktiengesellschaft | Förderanlage für ein Pulver |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003024613A1 (de) | 2001-09-14 | 2003-03-27 | Bayerische Motoren Werke Aktiengesellschaft | Vorrichtung zum fördern von pulver und verfahren zu deren betrieb |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH652100A5 (fr) * | 1983-04-28 | 1985-10-31 | Frederic Dietrich | Procede de transport des poudres et dispositif de mise en oeuvre. |
US5203507A (en) * | 1990-12-11 | 1993-04-20 | Matthews Richard H | Air powered sprayer for dispensing material slurries |
DE19959473A1 (de) * | 1999-12-10 | 2001-06-13 | Frederic Dietrich | Vorrichtung und Verfahren zum pneumatischen Fördern pulverförmiger Stoffe sowie Verwendung der Vorrichtung |
-
2004
- 2004-03-09 DE DE102004011445A patent/DE102004011445A1/de not_active Withdrawn
-
2005
- 2005-03-02 EP EP05004575A patent/EP1574261B1/de not_active Not-in-force
- 2005-03-02 ES ES05004575T patent/ES2325770T3/es active Active
- 2005-03-02 DE DE502005007168T patent/DE502005007168D1/de active Active
- 2005-03-02 AT AT05004575T patent/ATE429978T1/de not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003024613A1 (de) | 2001-09-14 | 2003-03-27 | Bayerische Motoren Werke Aktiengesellschaft | Vorrichtung zum fördern von pulver und verfahren zu deren betrieb |
DE10145448A1 (de) | 2001-09-14 | 2003-05-22 | Bayerische Motoren Werke Ag | Vorrichtung zum Fördern von Pulver und Verfahren zu deren Betrieb |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1772195A2 (de) * | 2005-10-07 | 2007-04-11 | Nordson Corporation | Steuereinrichtung für eine Pumpe für trockenes partikelförmiges Material |
EP1772195A3 (de) * | 2005-10-07 | 2008-09-17 | Nordson Corporation | Steuereinrichtung für eine Pumpe für trockenes partikelförmiges Material |
US7731456B2 (en) | 2005-10-07 | 2010-06-08 | Nordson Corporation | Dense phase pump with open loop control |
US8167517B2 (en) | 2005-10-07 | 2012-05-01 | Nordson Corporation | Pump with suction and pressure control for dry particulate material |
US8491227B2 (en) | 2005-10-07 | 2013-07-23 | Nordson Corporation | Pump for powder coating materials with data structure for storing powder flow recipes |
Also Published As
Publication number | Publication date |
---|---|
EP1574261A3 (de) | 2007-09-26 |
ATE429978T1 (de) | 2009-05-15 |
DE102004011445A1 (de) | 2005-09-22 |
ES2325770T3 (es) | 2009-09-16 |
EP1574261B1 (de) | 2009-04-29 |
DE502005007168D1 (de) | 2009-06-10 |
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