EP0311792B1 - Pumpvorrichtung zum gleichzeitigen Zuführen von zwei Zerstäuberflüssigkeiten zu einer Spritzvorrichtung - Google Patents

Pumpvorrichtung zum gleichzeitigen Zuführen von zwei Zerstäuberflüssigkeiten zu einer Spritzvorrichtung Download PDF

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Publication number
EP0311792B1
EP0311792B1 EP88114826A EP88114826A EP0311792B1 EP 0311792 B1 EP0311792 B1 EP 0311792B1 EP 88114826 A EP88114826 A EP 88114826A EP 88114826 A EP88114826 A EP 88114826A EP 0311792 B1 EP0311792 B1 EP 0311792B1
Authority
EP
European Patent Office
Prior art keywords
valves
air
valve
pilot
piston
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
Application number
EP88114826A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0311792A2 (de
EP0311792A3 (en
Inventor
Georg Schnetzer
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.)
Wagner International AG
Original Assignee
Wagner International AG
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 Wagner International AG filed Critical Wagner International AG
Publication of EP0311792A2 publication Critical patent/EP0311792A2/de
Publication of EP0311792A3 publication Critical patent/EP0311792A3/de
Application granted granted Critical
Publication of EP0311792B1 publication Critical patent/EP0311792B1/de
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area

Definitions

  • the invention relates to a pump device for the simultaneous supply of two atomizing liquids in a selectable ratio to a spray device according to the preamble of claim 1.
  • pump devices are known and available on the market.
  • the cyclical reversal of the two air motors takes place in that one of the two air motors is provided with two pilot valves, the sensors of which are located at the two dead points of the maximum piston stroke and, when the piston is in mechanical contact, pneumatic control signals to the both switch valves of the two air motors. This means that one of the two motors controls the pneumatic switching processes of both air motors.
  • the object of the present invention is therefore to improve the pumping device of the type mentioned at the outset in such a way that the quantitative ratio between the two liquid components can be changed as desired, without affecting the accuracy of the switching processes. This object is achieved by the characterizing features of patent claim 1.
  • both air motors are provided with pilot valves, the control outputs of which are interconnected and guided to the control inputs of the two changeover valves in such a way that the two changeover valves are only controlled by the pair of pilot valves which is assigned to the air motor with a currently larger piston stroke.
  • This enables the balance beam to be adjusted in both directions and thus any quantity ratio of the two liquid components to one another can be selected, for example a transmission ratio of 1: 1 to 1:10 and a reduction ratio of 1: 1 to 0.1: 1 , but the timing for the switchover of the two air motors is retained in its exactness.
  • the pump device has two pneumatic drive motors 10 and 11, each of which consists of a cylinder 10a or 11a, a piston 10b or 11b and a piston rod 10c or 11c.
  • the two piston rods 10c, 11c are connected to one another via a balance beam 12 with displaceable support 13.
  • the piston rods of two paint pumps to be driven by the air motors 10, 11 also extend from the two ends of the balance beam 12, these two pump units not being shown in the drawing.
  • the two air motors 10, 11 are each provided with a pneumatic switch valve 14 and 15, respectively.
  • Each of these changeover valves 14, 15 has a compressed air inlet, two compressed air outlets and two control inlets, the latter causing the switchover from one outlet to the other.
  • the two outlets of the valves 14, 15 open into the interior of the associated cylinder 10a and 11a, namely one outlet above and the other outlet below the piston 10b and 11b.
  • each of the air motors 10, 11 is equipped with two pilot valves 16, 17 and 18, 19, respectively.
  • Each pilot valve has a compressed air inlet and a compressed air outlet, the passage through the valve being controlled mechanically, i.e. the path from the inlet to the outlet of the valve is only opened when a sensor is pressed in mechanically against spring force.
  • the sensors of the two pilot valves 16, 17 and 18, 19 protrude from the ceiling or the bottom of the cylinder 10a or 11a into the cylinder interior, such that in one end position of the piston 10b or 11b the one sensor in the other end position the other sensor is mechanically acted upon.
  • the pump device has a main changeover valve 20, the construction of which is similar to that of the changeover valves 14, 15, ie the valve 20 has one compressed air inlet and two compressed air outlets, the changeover of which by two Control inputs is effected.
  • two shuttle valves 21 and 22 are provided, each having two compressed air inlets and a compressed air outlet and operating in the manner of electrical OR gates, ie when compressed air arrives at one inlet, the other inlet is blocked and vice versa.
  • the output lines 16a, 17a, 18a, 19a of the four pilot valves 16, 17, 18, 19 lie crosswise at the inputs of the two shuttle valves 21, 22, such that the output line 16a of the upper pilot valve 16 of the air motor 10 and the output line 19a of the lower pilot valve 19 of the air motor 11 at the inputs of the shuttle valve 21, the output line 17a of the lower pilot valve 17 of the air motor 10 and the output line 18a of the upper pilot valve 18 of the air motor 11 are at the inputs of the shuttle valve 22.
  • the output lines 21a and 22a of the two shuttle valves 21, 22 are located at the two control inputs of the main changeover valve 20.
  • the two outputs of the main changeover valve 20 are connected crosswise to the control inputs of the two changeover valves 14, 15, such that the an output line 20a branches to lines 20a 'and 20a ⁇ , one of which leads to the upper control inlet of the switching valve 14 and the other to the lower control inlet of the switching valve 15, whereas the second outlet 20b of the main switching valve 20 is in two lines 20b' and 20b ⁇ divides, one of which leads to the lower control inlet of the changeover valve 14 and the other to the upper control inlet of the changeover valve 15.
  • the device works as follows.
  • the operation of the air motors 10, 11 takes place in the known usual manner, ie the changeover valves 14, 15 assigned to them alternately allow compressed air to flow into the cylinder space above or below the pistons 10b and 11b via their two compressed air outlets, so that these pistons perform an up-down drive movement, in push-pull mode, because the control inputs of the two changeover valves 14, 15 are cross-connected to one another, as is known.
  • the switching valves 14, 15 are switched over by the pilot valves 16, 17, 18, 19, which give a switching signal to the switching valves 14, 15 when their sensors are touched by the pistons 10b or 11b.
  • pilot valves 16 17, 18, 19 which give a switching signal to the switching valves 14, 15 when their sensors are touched by the pistons 10b or 11b.
  • the main changeover valve 20 is switched from its one outlet 20a to its other outlet 20b and thus controls the two switchover valves 14, 15 via the lines 20b 'and 20b ⁇ that the compressed air now passes over the piston 10b and under the piston 11b into the cylinders 11a and 10a, with the result of a reversal of the piston movement.
  • the support 13 can be shifted to the right or left as desired, and in any case the air motor with the larger piston takes over the switching control automatically, namely the sole switching control.
  • the use of the main changeover valve and the changeover valves also ensure precisely defined pneumatic control signals which ensure the accuracy of the pneumatic control, which is of great importance because the two air motors 14, 15 are mechanically connected to one another via the balance beam 12 .
  • the invention is not limited to the exemplary embodiment shown, but numerous modifications are possible compared to it.
  • the shuttle valves could be omitted provided that the pilot valves are provided with non-return devices, i.e. the ingress of Compressed air prevented automatically.
  • the outputs of the two changeover valves could also be routed directly to the control inputs of the two changeover valves, with the omission of the main changeover valve, but there is a risk that the pneumatic control signals arriving at the changeover valves are less precisely defined, because in this case the compressed air is already there had to flow through two valves (pilot valve and shuttle valve).

Landscapes

  • Reciprocating Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Nozzles (AREA)
  • Spray Control Apparatus (AREA)
EP88114826A 1987-10-15 1988-09-09 Pumpvorrichtung zum gleichzeitigen Zuführen von zwei Zerstäuberflüssigkeiten zu einer Spritzvorrichtung Expired - Lifetime EP0311792B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873734980 DE3734980A1 (de) 1987-10-15 1987-10-15 Pumpvorrichtung zum gleichzeitigen zufuehren von zwei zerstaeuberfluessigkeiten zu einer spritzvorrichtung
DE3734980 1987-10-15

Publications (3)

Publication Number Publication Date
EP0311792A2 EP0311792A2 (de) 1989-04-19
EP0311792A3 EP0311792A3 (en) 1990-04-25
EP0311792B1 true EP0311792B1 (de) 1992-11-11

Family

ID=6338419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114826A Expired - Lifetime EP0311792B1 (de) 1987-10-15 1988-09-09 Pumpvorrichtung zum gleichzeitigen Zuführen von zwei Zerstäuberflüssigkeiten zu einer Spritzvorrichtung

Country Status (4)

Country Link
US (1) US4917580A (enrdf_load_stackoverflow)
EP (1) EP0311792B1 (enrdf_load_stackoverflow)
JP (1) JP2563992B2 (enrdf_load_stackoverflow)
DE (1) DE3734980A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1230880B (it) * 1989-06-20 1991-11-08 Enea Mattei Spa Compressore rotativo con dispositivo oleopneumatico di regolazione della portata
US20020122887A1 (en) * 2000-11-29 2002-09-05 Derek Forbes Process for variable applications of coating compositions with a three or more plural component apparatus
DE10318004B3 (de) * 2003-04-19 2004-12-09 J. Wagner Ag Förderaggregat für viskose Medien
US9611844B2 (en) 2011-04-27 2017-04-04 Graco Minnesota Inc. Reciprocating pump valve assembly with thermal relief
WO2012149013A2 (en) 2011-04-27 2012-11-01 Graco Minnesota Inc. Method to prevent debris build-up on reciprocating air motor pilot valves
US10197047B2 (en) * 2014-06-11 2019-02-05 Graco Minnesota, Inc. Hydraulic proportioning system with flow divider
DE102021130933B4 (de) 2021-11-25 2024-10-02 Almouthana Almoukdad Arbeitskraftmaschine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1230264B (de) * 1959-09-26 1966-12-08 Elisabeth Zoeller Geb Kehl Steuerung fuer einen Druckmittelmotor mit doppelseitig gesteuert beaufschlagtem Arbeitskolben
DE2312647A1 (de) * 1973-03-14 1974-09-19 Lupert Geb Ruck Rosemarie Dosierpumpe, insbesondere zum dosieren mehrerer kunstoffkomponenten
FR2396184A1 (fr) * 1977-06-29 1979-01-26 Allibe Ateliers & Co Machine pour le dosage volumetrique reglable de composants liquides
DE2854687A1 (de) * 1978-12-18 1980-06-26 Hedrich Vakuumanlagen Wilhelm Antriebsvorrichtung fuer hubweise arbeitende dosierpumpen und/oder dosiereinrichtungen mit unterschiedlichen oeffnungs- schliesshub-verhaeltnissen, zur synchronen abgabe ungleicher mengen
EP0078516A1 (de) * 1981-11-02 1983-05-11 J. Wagner AG Pumpvorrichtung zum gleichzeitigen Zuführen von zumindest zwei Zerstäubungsflüssigkeiten im wählbaren Mengenverhältnis zu einer Spritzvorrichtung
WO1983001983A1 (en) * 1981-11-25 1983-06-09 Box, Frederick, James Pump systems
US4487367A (en) * 1982-10-14 1984-12-11 General Motors Corporation Paint color change and flow control system
DE3329296C2 (de) * 1983-08-12 1985-06-05 Reinhardt-Technik GmbH, 5883 Kierspe Verfahren und Einrichtung zum Dosieren von viskosen Stoffen, insbesondere Zweikomponenten-Kunststoffen
FR2562813A1 (fr) * 1984-04-17 1985-10-18 Kiefer Antoine Pulverisateur de melange de composants liquides

Also Published As

Publication number Publication date
DE3734980C2 (enrdf_load_stackoverflow) 1989-07-27
JPH01130748A (ja) 1989-05-23
EP0311792A2 (de) 1989-04-19
US4917580A (en) 1990-04-17
DE3734980A1 (de) 1989-04-27
EP0311792A3 (en) 1990-04-25
JP2563992B2 (ja) 1996-12-18

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