EP1712796A1 - Diaphragm pump - Google Patents

Diaphragm pump Download PDF

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Publication number
EP1712796A1
EP1712796A1 EP05008040A EP05008040A EP1712796A1 EP 1712796 A1 EP1712796 A1 EP 1712796A1 EP 05008040 A EP05008040 A EP 05008040A EP 05008040 A EP05008040 A EP 05008040A EP 1712796 A1 EP1712796 A1 EP 1712796A1
Authority
EP
European Patent Office
Prior art keywords
diaphragm pump
membranes
pressure
hydraulic
medium
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
Application number
EP05008040A
Other languages
German (de)
French (fr)
Other versions
EP1712796B1 (en
Inventor
Karsten Jüterbock
Angelo Basso
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.)
J Wagner AG
Original Assignee
J Wagner 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
Priority to ES05008040T priority Critical patent/ES2288711T3/en
Application filed by J Wagner AG filed Critical J Wagner AG
Priority to DE502005000867T priority patent/DE502005000867D1/en
Priority to AT05008040T priority patent/ATE364790T1/en
Priority to EP05008040A priority patent/EP1712796B1/en
Priority to KR1020060031229A priority patent/KR101291316B1/en
Priority to US11/400,581 priority patent/US8123500B2/en
Priority to JP2006108637A priority patent/JP2006291957A/en
Publication of EP1712796A1 publication Critical patent/EP1712796A1/en
Application granted granted Critical
Publication of EP1712796B1 publication Critical patent/EP1712796B1/en
Priority to JP2009001922U priority patent/JP3151123U/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F04B43/0736—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/02—Packing the free space between cylinders and pistons
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
    • F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/11—Kind or type liquid, i.e. incompressible

Definitions

  • the invention relates to a diaphragm pump with two in a pump housing used on a zu felicitndes liquid or free-flowing medium, e.g. a color, acting membranes, which are actuated by means of an arranged between the membranes and on both sides of a pressure medium alternately acted adjusting piston and which are supported in the edge regions of two firmly connected to this piston rods.
  • a diaphragm pump with two in a pump housing used on a zu felicitndes liquid or free-flowing medium, e.g. a color, acting membranes, which are actuated by means of an arranged between the membranes and on both sides of a pressure medium alternately acted adjusting piston and which are supported in the edge regions of two firmly connected to this piston rods.
  • a diaphragm pump of this kind is by the DE 195 35 745 C1 known.
  • the two membranes each have a further pressure chamber associated with this embodiment, which are separated from the delivery chambers by the membranes.
  • the pressure chambers here in synchronism with the adjusting movements of the mechanically mechanically connected drive piston of an air motor controlled pressure medium supplied, so that although a pressure boosting is given, the required construction and investment costs, however, is considerable.
  • a separate control device is provided between the air motor and one of the membranes, which is susceptible to interference and builds large.
  • the membrane folds over each other, so that their flexing zones are subjected to extremely high stresses due to the alternating tensile and compressive loads. This already leads to relative short operating time to damage the membranes, so they must be replaced and in such cases, business interruptions are to be accepted.
  • the folding over of the membrane has an unfavorable effect on the delivery behavior of the membrane pump, since thereby volume changes in the delivery chambers are unavoidable and the delivery flow thereby pulsates conditionally.
  • the object of the invention is therefore to form a diaphragm pump of the aforementioned type in such a way that the membranes are not subject to changing loads during operation, but rather always maintain their predetermined installation position. A folding over of the membrane should thus be excluded, so that their stresses are low despite high delivery pressures and thus almost impossible damage.
  • the construction cost, by means of which this is to be achieved, should be kept low, yet should be given a simple design configuration trouble-free operation over a long period. Also, no changes in the volumes of the pumping rooms should occur.
  • a membrane pump of the aforementioned type characterized in that the two membranes are clamped with a mutually facing curvature or with a curvature facing away from each other with their outer edge regions fixed in the pump housing and with its inner edge regions on the adjustable piston rods and the two reaction spaces formed between the diaphragms and a cylinder accommodating the adjusting piston are filled with a hydraulic medium and positively connected to one another via a hydraulic linkage.
  • the reaction chambers accommodating the diaphragms and the connecting pipes connected thereto are to be completely filled with a hydraulic medium and hermetically sealed, the hydraulic fluid forming the hydraulic linkage being subjected to atmospheric pressure or a negative pressure of up to 0.09 MPa is and connecting the two reaction spaces line through a plug should be sealed liquid-tight or sealed. In this way it is ensured that the membranes are fixed in the predetermined position.
  • each space should be permanently connected via one or more incorporated into the cylinder openings with the immediately adjacent pressure chamber of Verstellkulbens.
  • both diaphragms always maintain the predefined installation position and do not fold over during the transition from a suction stroke into a pressure stroke.
  • the illustrated in Figure 1 and designated 1 diaphragm pump is used to convey a liquid, such as a color to be processed, from a storage container 2 to a spray gun 5 and consists essentially of two in a housing 11 arranged membrane 19 and 20, with one of Pressure medium alternately acted adjusting piston 22 are drivingly connected. Via a suction line 3, the diaphragm pump 1 is connected to the storage container 2, a pressure line 4 connects the diaphragm pump 1 with the spray gun. 5
  • the adjusting piston 22 is arranged in the embodiment shown in a cylinder 21 which is installed between the two membranes 19 and 20 with in the housing 11.
  • the pressure chambers 25 and 26 of the adjusting piston 22 is alternately supplied to the pressurization pressure medium, which is taken from a pressure line 6 and with the aid of a 4/2-way valve in downstream pressure lines 8 or 9 can be introduced, to the pressure chambers 25 and 26 respectively are connected.
  • the membranes 19 and 20 are clamped with their outer edge regions between discs 37 and the cylinder 21, with their inner edge regions, however, they are held between discs 38 and 39, which are plugged onto the adjusting piston 22 projecting piston rods 23 and 24 respectively.
  • a nut 40 screwed onto a threaded shoulder 24 1 of the piston rods 23, 24 is used, so that the discs 38 and 39, as can be seen in particular from FIG. 2, are supported on the piston rods 23, 24 offset in the edge region.
  • the diaphragms 19 and 20 are each assigned a pressure chamber 13 or 14, to which the medium to be conveyed flows via inlet ducts 15 and 16, respectively, into the housing 11, which is connected to the suction line 3. About the pressure chambers 13 and 14 downstream outlet valves 17 and 18, the medium to be conveyed in a mirror image to the channel 12 extending channel 12 first to which the pressure line 4 is connected.
  • the medium to be processed is sucked into the pressure chamber 13 by means of the diaphragm 19 driven by the adjusting piston 22, whereas the medium located in the pressure chamber 14 is expelled through the diaphragm 20.
  • the inlet valve 15 and the outlet valve 18 are opened in this operating state, but the inlet valve 16 and the outlet valve 17 are closed, so that the medium from the storage container 2 over the Suction line 3 and the channel 12 sucked into the pressure chamber 13 and can be supplied from the pressure chamber 14 via the channel 12 1 and the pressure line 4 of the spray gun 5.
  • the membranes 19 and 20 are clamped in the diaphragm pump 1 in such a way that they are with their bulges 41 and 41 'facing each other (F2) or facing away from each other (F3).
  • the membranes 19 and 20 thus lie with their mutually facing surfaces on the hydraulic linkage H and are fixed by this, since this is acted upon by atmospheric pressure or a slight negative pressure of up to 0.09 MPa.
  • the diaphragms 19 and 20 can thus not be folded down, but instead retain the position shown, as is shown in dashed lines in FIGS. 2 and 3.
  • the membranes 19 and 20 are subjected to tensile stress only, so that they can be designed to be elastically deformable in their flexing region and nevertheless have a long service life.
  • the reaction chambers 27 and 28 in the region of the piston rods 23 and 24 are each closed by a bellows 31 and 32 respectively.
  • the bellows 31 and 32 are clamped at one end to the piston rods 23 and 24, with the other ends are attached to the cylinder 21.
  • the spaces enclosed by the bellows 31 and 32 are 33 and 34 connected via holes 21 in the bore holes 35 and 36 connected to the pressure chambers 25 and 26, so that automatically a pressure equalization takes place.
  • the two diaphragms 19, 20 of the diaphragm pump 1 are clamped with convexities 41 'facing away from one another in the outer edge area between the disks 37 and the cylinder 21 and in the inner edge area between the disks 38 and 39. Since the reaction spaces 27 and 28 are also completely filled with a hydraulic fluid and communicating with each other, a folding over of the membranes 19 and 20 is also excluded. These are rather supported on the hydraulic linkage H.
  • the diaphragm pump 1 can due to the fixation of the membrane 19 and 20 by the hydraulic linkage H of the spray gun 5, the medium to be processed, since no 19 and / or 20 caused by folding the membrane changes in the volumes of the pressure chambers 13 and 14 in purchasing are fed pulsation-free. Also, the membranes 19 and 20 are subjected to tensile stresses only, a trouble-free continuous operation of the diaphragm pump 1 over a long period of time is therefore ensured.

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

Abstract

The pump (1) has two membranes (19,20) with curvatures facing towards or away from each other with their outer edges fixed in the pump housing (11) and their inner edge regions clamped to displaceable piston rods. Two reaction chambers (27,28) formed between the membranes and a cylinder holding the piston (22) are filled with hydraulic medium and are connected by a hydraulic rod.

Description

Die Erfindung bezieht sich auf eine Membranpumpe mit zwei in einem Pumpengehäuse eingesetzte auf ein zuförderndes flüssiges oder rieselfähiges Medium, z.B. eine Farbe, einwirkenden Membranen, die mittels eines zwischen den Membranen angeordneten und beidseitig von einem Druckmittel wechselweise beaufschlagbaren Verstellkolben betätigbar und die in den Randbereichen zweier mit diesem fest verbundener Kolbenstangen abgestützt sind.The invention relates to a diaphragm pump with two in a pump housing used on a zuförderndes liquid or free-flowing medium, e.g. a color, acting membranes, which are actuated by means of an arranged between the membranes and on both sides of a pressure medium alternately acted adjusting piston and which are supported in the edge regions of two firmly connected to this piston rods.

Eine Membranpumpe dieser Art ist durch die DE 195 35 745 C1 bekannt. Den beiden Membranen ist bei dieser Ausgestaltung jeweils ein weiterer Druckraum zugeordnet, die von den Förderräumen durch die Membranen getrennt sind. Den Druckräumen wird hierbei synchron zu den Verstellbewegungen des mit den Membranen mechanisch verbundenen Antriebskolbens eines Luftmotors gesteuert Druckmittel zugeführt, so dass zwar eine Druckübersetzung gegeben ist, der dazu erforderliche Bau- und Investitionsaufwand ist jedoch erheblich.A diaphragm pump of this kind is by the DE 195 35 745 C1 known. The two membranes each have a further pressure chamber associated with this embodiment, which are separated from the delivery chambers by the membranes. The pressure chambers here in synchronism with the adjusting movements of the mechanically mechanically connected drive piston of an air motor controlled pressure medium supplied, so that although a pressure boosting is given, the required construction and investment costs, however, is considerable.

Zwischen dem Luftmotor und einer der Membranen ist nämlich eine gesonderte Steuereinrichtung vorgesehen, die störanfällig ist und groß baut. Vor allem aber ist von Nachteil, dass beim Übergang von einem Saughub in einen Druckhub die Membrane jeweils umklappen, so dass deren Walkzonen durch die wechselnden Zug- und Druckbelastungen überaus stark beansprucht werden. Dies führt bereits nach relativ kurzer Betriebszeit zu Beschädigungen der Membranen, so dass diese ausgewechselt werden müssen und in derartigen Fällen Betriebsunterbrechungen in Kauf zu nehmen sind. Des Weiteren wirkt sich das Umklappen der Membrane ungünstig auf das Förderverhalten der Membranpumpe aus, da dadurch Volumenveränderungen in den Förderräumen unumgänglich sind und der Förderstrom dadurch bedingt pulsiert.Namely, a separate control device is provided between the air motor and one of the membranes, which is susceptible to interference and builds large. Above all, it is disadvantageous that during the transition from a suction stroke into a pressure stroke, the membrane folds over each other, so that their flexing zones are subjected to extremely high stresses due to the alternating tensile and compressive loads. This already leads to relative short operating time to damage the membranes, so they must be replaced and in such cases, business interruptions are to be accepted. Furthermore, the folding over of the membrane has an unfavorable effect on the delivery behavior of the membrane pump, since thereby volume changes in the delivery chambers are unavoidable and the delivery flow thereby pulsates conditionally.

Aufgabe der Erfindung ist es daher, eine Membranpumpe der vorgenannten Gattung in der Weise auszubilden, dass die Membranen im Betrieb keinen wechselnden Belastungen unterworfen sind, sondern vielmehr stets ihre vorgegebene Einbaulage beibehalten. Ein Umklappen der Membrane soll somit ausgeschlossen sein, so dass deren Beanspruchungen trotz hoher Förderdrücke gering und demnach Beschädigungen nahezu ausgeschlossen sind. Der Bauaufwand, mittels dem dies zu erreichen ist, soll gering gehalten werden, dennoch soll bei einfacher konstruktiver Ausgestaltung eine störungsfreie Betriebsweise über einen langen Zeitraum gegeben sein. Auch sollen keine Änderungen der Volumina der Förderräume auftreten.The object of the invention is therefore to form a diaphragm pump of the aforementioned type in such a way that the membranes are not subject to changing loads during operation, but rather always maintain their predetermined installation position. A folding over of the membrane should thus be excluded, so that their stresses are low despite high delivery pressures and thus almost impossible damage. The construction cost, by means of which this is to be achieved, should be kept low, yet should be given a simple design configuration trouble-free operation over a long period. Also, no changes in the volumes of the pumping rooms should occur.

Gemäß der Erfindung wird dies bei einer Membranpumpe der vorgenannten Art dadurch erreicht, dass die beiden Membranen mit einer aufeinander zu gerichteten Wölbung oder mit einer voneinander abgewandten Wölbung mit ihren äußeren Randbereichen ortsfest in dem Pumpengehäuse und mit ihren inneren Randbereichen an den verstellbaren Kolbenstangen eingespannt sind und dass die beiden zwischen den Membranen und einem den Verstellkolben aufnehmenden Zylinder jeweils gebildeten Reaktionsräume mit einem Hydraulikmedium ausgefüllt und über ein hydraulisches Gestänge zwangläufig miteinander verbunden sind.According to the invention, this is achieved in a membrane pump of the aforementioned type, characterized in that the two membranes are clamped with a mutually facing curvature or with a curvature facing away from each other with their outer edge regions fixed in the pump housing and with its inner edge regions on the adjustable piston rods and the two reaction spaces formed between the diaphragms and a cylinder accommodating the adjusting piston are filled with a hydraulic medium and positively connected to one another via a hydraulic linkage.

Die das den Membranen zugeordnete hydraulische Gestänge aufnehmende Reaktionsräume und die an diese angeschlossene Verbindungsleitungen sind hierbei mit einem hydraulischen Medium vollständig zu befüllen und hermetisch abgedichtet auszubilden, wobei die das hydraulische Gestänge bildende Hydraulikflüssigkeit von atmosphärischem Druck oder einem Unterdruck von bis zu 0,09 MPa beaufschlagt ist und die die beiden Reaktionsräume verbindende Leitung durch einen Stopfen flüssigkeitsdicht verschlossen oder versiegelt sein sollte. Auf diese Weise ist gewährleistet, dass die Membranen in der vorgegebenen Lage fixiert sind.The reaction chambers accommodating the diaphragms and the connecting pipes connected thereto are to be completely filled with a hydraulic medium and hermetically sealed, the hydraulic fluid forming the hydraulic linkage being subjected to atmospheric pressure or a negative pressure of up to 0.09 MPa is and connecting the two reaction spaces line through a plug should be sealed liquid-tight or sealed. In this way it is ensured that the membranes are fixed in the predetermined position.

Zur inneren Abdichtung der Reaktionsräume ist es zweckmäßig, jeweils einen Faltenbalg vorzusehen, die mit einem Ende an dem Zylinder und mit dem anderen Ende an den Kolbenstangen eingespannt sind. Die von den Faltenbälgen jeweils eingeschlossenen Räume sollten über eine oder mehrere in den Zylinder eingearbeitete Öffnungen mit dem unmittelbar benachbarten Druckraum des Verstellkulbens ständig verbunden sein.For internal sealing of the reaction chambers, it is expedient to provide in each case a bellows, which are clamped at one end to the cylinder and at the other end to the piston rods. The enclosed by the bellows each spaces should be permanently connected via one or more incorporated into the cylinder openings with the immediately adjacent pressure chamber of Verstellkulbens.

Wird eine Membranpumpe gemäß der Erfindung ausgebildet, so ist gewährleistet, dass beide Membranen die vorgegebene Einbaulage etwa stets beibehalten und beim Übergang von einem Saughub in einen Druckhub nicht umklappen. Dadurch, dass die Membrane auf den dem Zylinder zugekehrten Seiten an dem hydraulischen Gestänge ständig anliegen und dieses kein Abheben der Membrane zulässt, werden diese bei Verstellbewegungen immer nur auf Zug beansprucht und sind demnach keinen wechselnden Belastungen unterworfen. Die Standzeit der Membran kann somit, ohne dass diese in besonderer Weise auszubilden oder auszulegen sind, in einem erheblichen Maße gesteigert werden.If a diaphragm pump according to the invention is formed, it is ensured that both diaphragms always maintain the predefined installation position and do not fold over during the transition from a suction stroke into a pressure stroke. The fact that the membrane on the sides facing the cylinder on the hydraulic linkage constantly abut and this does not allow lifting of the membrane, they are always claimed for adjustment movements only to train and are therefore not subject to changing loads. The service life of the membrane can thus be increased to a considerable extent, without these being designed or designed in a special way.

Der Bauaufwand, mittels dem die durch Membranbeschädigungen bedingte Störanfälligkeit derartiger Membranpumpen reduziert werden kann, ist gering, da lediglich eine bestimmte in Bezug auf den Zylinder konvexe oder konkave Einbaulage der Membrane zu wählen ist und außerdem diese über das hydraulische Gestänge gewissermaßen starr miteinander verbunden sind. Dazu ist in besonderer Weise das vorgesehene hydraulische Gestänge geeignet, an dem die Membrane flächig anliegen, ohne dass eine mechanische Koppelung notwendig ist. Das hydraulische Gestänge folgt, da die Reaktionsräume kommunizierend miteinander verbunden sind, den jeweiligen Verstellbewegungen der Membrane, diese können demnach nicht umklappen und sind nur geringfügig Walkbewegungen unterworfen. Die Membrane, die nur Zugbelastungen ausgesetzt sind, können somit leicht elastisch verformbar gestaltet werden.The construction cost, by means of which the membrane damage due to membrane damage susceptibility of such diaphragm pumps can be reduced, since only a certain with respect to the cylinder convex or concave mounting position of the membrane is to be selected and also these are connected via the hydraulic linkage to some extent rigidly together. For this purpose, the proposed hydraulic linkage is suitable in a special way, to which the membrane abut flat, without a mechanical coupling is necessary. The hydraulic linkage follows, since the reaction chambers are communicatingly connected to each other, the respective adjustment movements of the membrane, they can therefore not fold down and are only slightly subjected to flexing movements. The membrane that only Tensile stresses are exposed, thus can be easily made elastically deformable.

Des Weiteren ist von Vorteil, dass in den Förderräumen der Membranpumpe nach einem Richtungswechsel, d.h. nach einem Umschalten.von einem Saughub auf einen Druckhub bzw. umgekehrt, in diesen keine Raumerweiterungen auftreten, durch die mitunter der Förderstrom kurzfristig unterbrochen wird. In der Förderleitung sind demnach keine Pulsationen feststellbar, so dass auch das Betriebsverhalten der vorschlagsgemäß ausgebildeten Membranpumpe verbessert ist.Furthermore, it is advantageous that in the delivery chambers of the diaphragm pump after a change of direction, i. after a switching from a suction stroke to a pressure stroke or vice versa, in which no room expansions occur, by which sometimes the flow is temporarily interrupted. Accordingly, no pulsations can be detected in the delivery line, so that the operating behavior of the proposed proposed diaphragm pump is also improved.

In der Zeichnung ist ein Ausführungsbeispiel der gemäß der Erfindung ausgebildeten Membranpumpe dargestellt, das nachfolgend im Einzelnen erläutert ist. Hierbei zeigt:

Figur 1
die Membranpumpe in einem Axialschnitt mit zugeordneten schematisch wiedergegebenen Peripheriegeräten,
Figur 2
einen Ausschnitt aus der Membranpumpe nach Figur 1 in einer vergrößerten Darstellung und
Figur 3
einen Ausschnitt gemäß Figur 2 mit Membrane, deren Wölbung abgewandt zueinander gerichtet ist.
In the drawing, an embodiment of the invention designed according to the diaphragm pump is shown, which is explained in detail below. Hereby shows:
FIG. 1
the diaphragm pump in an axial section with associated schematically represented peripheral devices,
FIG. 2
a section of the diaphragm pump of Figure 1 in an enlarged view and
FIG. 3
a section according to Figure 2 with membrane whose curvature is directed away from each other.

Die in Figur 1 dargestellte und mit 1 bezeichnete Membranpumpe dient zur Förderung einer Flüssigkeit, beispielsweise einer zu verarbeitenden Farbe, aus einem Vorratsbehältnis 2 zu einer Spritzpistole 5 und besteht im wesentlichen aus zwei in einem Gehäuse 11 angeordneten Membrane 19 und 20, die mit einem von Druckmittel wechselweise beaufschlagbaren Verstellkolben 22 trieblich verbunden sind. Über eine Saugleitung 3 ist die Membranpumpe 1 an das Vorratsbehältnis 2 angeschlossen, eine Druckleitung 4 verbindet die Membranpumpe 1 mit der Spritzpistole 5.The illustrated in Figure 1 and designated 1 diaphragm pump is used to convey a liquid, such as a color to be processed, from a storage container 2 to a spray gun 5 and consists essentially of two in a housing 11 arranged membrane 19 and 20, with one of Pressure medium alternately acted adjusting piston 22 are drivingly connected. Via a suction line 3, the diaphragm pump 1 is connected to the storage container 2, a pressure line 4 connects the diaphragm pump 1 with the spray gun. 5

Der Verstellkolben 22 ist bei dem gezeigten Ausführungsbeispiel in einem Zylinder 21 angeordnet, der zwischen den beiden Membranen 19 und 20 mit in das Gehäuse 11 eingebaut ist. Den Druckräumen 25 und 26 des Verstellkolbens 22 wird zu dessen Beaufschlagung wechselweise Druckmittel zugeführt, das einer Druckleitung 6 entnommen wird und mit Hilfe eines 4/2-Wege-Ventils in nachgeschaltete Druckleitungen 8 oder 9 einbringbar ist, die an die Druckräume 25 bzw. 26 angeschlossen sind.The adjusting piston 22 is arranged in the embodiment shown in a cylinder 21 which is installed between the two membranes 19 and 20 with in the housing 11. The pressure chambers 25 and 26 of the adjusting piston 22 is alternately supplied to the pressurization pressure medium, which is taken from a pressure line 6 and with the aid of a 4/2-way valve in downstream pressure lines 8 or 9 can be introduced, to the pressure chambers 25 and 26 respectively are connected.

Die Membrane 19 und 20 sind mit ihren äußeren Randbereichen jeweils zwischen Scheiben 37 und dem Zylinder 21 eingespannt, mit ihren inneren Randbereichen sind diese dagegen zwischen Scheiben 38 und 39 gehalten, die auf von dem Verstellkolben 22 abstehenden Kolbenstangen 23 bzw. 24 aufgesteckt sind. Zur Verspannung dient hierbei eine auf einen Gewindeansatz 241 der Kolbenstangen 23, 24 aufgeschraubte Mutter 40, so dass die Scheiben 38 und 39, wie dies insbesondere der Figur 2 zu entnehmen ist, an den im Randbereich abgesetzten Kolbenstangen 23, 24 abgestützt sind.The membranes 19 and 20 are clamped with their outer edge regions between discs 37 and the cylinder 21, with their inner edge regions, however, they are held between discs 38 and 39, which are plugged onto the adjusting piston 22 projecting piston rods 23 and 24 respectively. For clamping purposes, a nut 40 screwed onto a threaded shoulder 24 1 of the piston rods 23, 24 is used, so that the discs 38 and 39, as can be seen in particular from FIG. 2, are supported on the piston rods 23, 24 offset in the edge region.

Den Membranen 19 und 20 ist jeweils ein Druckraum 13 bzw. 14 zugeordnet, den das zu fördernde Medium über einen an die Saugleitung 3 angeschlossenen in das Gehäuse 11 eingeformten Kanal 12 über Einlassventile 15 bzw. 16 zuströmt. Über den Druckräumen 13 und 14 nachgeschaltete Auslassventile 17 bzw. 18 gelangt das zu fördernde Medium in einen spiegelbildlich zu dem Kanal 12 verlaufenden Kanal 121. an den die Druckleitung 4 angeschlossen ist.The diaphragms 19 and 20 are each assigned a pressure chamber 13 or 14, to which the medium to be conveyed flows via inlet ducts 15 and 16, respectively, into the housing 11, which is connected to the suction line 3. About the pressure chambers 13 and 14 downstream outlet valves 17 and 18, the medium to be conveyed in a mirror image to the channel 12 extending channel 12 first to which the pressure line 4 is connected.

In der dargestellten Betriebsstellung der Membranpumpe 1 wird mit Hilfe der durch den Verstellkolben 22 angetriebenen Membran 19 das zu verarbeitende Medium in den Druckraum 13 gesaugt, das in den Druckraum 14 befindliche Medium wird dagegen durch die Membran 20 ausgestoßen. Das Einlassventil 15 und das Auslassentil 18 sind in diesem Betriebszustand geöffnet, das Einlassventil 16 und das Auslassentil 17 sind jedoch geschlossen, so dass das Medium aus dem Vorratsbehältnis 2 über die Saugleitung 3 und den Kanal 12 in den Druckraum 13 gesaugt und aus dem Druckraum 14 über den Kanal 121 und die Druckleitung 4 der Spritzpistole 5 zugeführt werden kann.In the illustrated operating position of the diaphragm pump 1, the medium to be processed is sucked into the pressure chamber 13 by means of the diaphragm 19 driven by the adjusting piston 22, whereas the medium located in the pressure chamber 14 is expelled through the diaphragm 20. The inlet valve 15 and the outlet valve 18 are opened in this operating state, but the inlet valve 16 and the outlet valve 17 are closed, so that the medium from the storage container 2 over the Suction line 3 and the channel 12 sucked into the pressure chamber 13 and can be supplied from the pressure chamber 14 via the channel 12 1 and the pressure line 4 of the spray gun 5.

Durch eine gesteuerte Umschaltung des Wegeventils 7 wird, sobald über die Druckleitung 9 aus der Druckleitung 6 Druckmittel in den Druckraum 26 des Verstellkolbens 22 eingebracht wird, die Verstellbewegung des Verstellkolbens 22 und der mit diesem fest verbundenen Membrane 19 und 20 umgekehrt. Dadurch wird das Einlassventil 15 geöffnet und das Auslassventil 17 geschlossen. Gleichzeitig wird das Einlassventil 17 geschlossen und das Auslassventil 15 geöffnet, so dass das in dem Druckraum 13 befindliche Medium ausgestoßen und in den Druckraum 14 weiteres Medium angesaugt wird. Eine pulsationsfreie Förderung in der Druckleitung 4 ist auf diese Weise sichergestellt.By controlled switching of the directional control valve 7, as soon as 6 pressure medium in the pressure chamber 26 of the adjusting piston 22 is introduced via the pressure line 9, the adjusting movement of the adjusting piston 22 and the fixedly connected to this membrane 19 and 20 vice versa. As a result, the inlet valve 15 is opened and the outlet valve 17 is closed. At the same time, the inlet valve 17 is closed and the outlet valve 15 is opened so that the medium located in the pressure chamber 13 is expelled and further medium is sucked into the pressure chamber 14. A pulsation-free promotion in the pressure line 4 is ensured in this way.

Die Membranen 19 und 20 sind bei der Membranpumpe 1 in der Weise eingespannt, dass diese mit ihren Wölbungen 41 bzw. 41' aufeinander zu gerichtet (F2) oder voneinander abgewandt (F3) sind. Außerdem sind die Reaktionsräume 27 und 28, die zwischen den Membranen 19 und 20 sowie dem Zylinder 21 gebildet sind, über eine Leitung 29, die durch einen Verschlussstopfen 30 flüssigkeitsdicht verschlossen ist, miteinander verbunden und mit einer Flüssigkeit, die ein hydraulisches Gestänge H bildet, vollständig ausgefüllt. Die Membranen 19 und 20 liegen mit ihren einander zugekehrten Flächen somit an dem hydraulischen Gestänge H an und werden durch dieses, da dieses von Atmosphärendruck oder einem geringen Unterdruck von bis zu 0,09 MPa beaufschlagt ist, fixiert.The membranes 19 and 20 are clamped in the diaphragm pump 1 in such a way that they are with their bulges 41 and 41 'facing each other (F2) or facing away from each other (F3). In addition, the reaction spaces 27 and 28, which are formed between the membranes 19 and 20 and the cylinder 21, via a conduit 29 which is liquid-tightly closed by a sealing plug 30, connected to each other and with a liquid which forms a hydraulic linkage H, completed. The membranes 19 and 20 thus lie with their mutually facing surfaces on the hydraulic linkage H and are fixed by this, since this is acted upon by atmospheric pressure or a slight negative pressure of up to 0.09 MPa.

Bei Umkehrung der Verstellbewegungen können somit die Membranen 19 und 20 nicht umklappen, diese behalten vielmehr die dargestellte Lage, wie dies in den Figuren 2 und 3strichpunktiert eingezeichnet ist, bei. Bei den Verstellbewegungen sind die Membrane 19 und 20 nur Zugbeanspruchung unterworfen, so dass diese in ihrem Walkbereich elastisch verformbar ausgelegt werden können und dennoch eine hohe Standzeit aufweisen.When the adjustment movements are reversed, the diaphragms 19 and 20 can thus not be folded down, but instead retain the position shown, as is shown in dashed lines in FIGS. 2 and 3. During the adjustment movements, the membranes 19 and 20 are subjected to tensile stress only, so that they can be designed to be elastically deformable in their flexing region and nevertheless have a long service life.

Um auszuschließen, dass die in den Reaktionsräumen 27 und 28 befindliche Flüssigkeit über die Durchbrechungen der Kolbenstangen 23 und 24 in dem Zylinder 21 im Laufe der Betriebszeit in die Druckräume 25 und/oder 26 gelangen können und somit ein Freiraum in den Reaktionsräumen 27 und 28 entstehen kann, sind die Reaktionsräume 27 und 28 im Bereich der Kolbenstangen 23 und 24 jeweils durch einen Faltenbalg 31 bzw. 32 fest verschlossen. Die Faltenbälge 31 und 32 sind mit einem Ende an den Kolbenstangen 23 und 24 eingespannt, mit den anderen Enden sind diese an dem Zylinder 21 befestigt. Außerdem sind die von den Faltenbälgen 31 und 32 eingeschlossenen Räume 33 bzw. 34 über in den Zylinder 21 eingearbeitete Bohrungen 35 bzw. 36 mit den Druckräumen 25 und 26 verbunden, so dass selbsttätig ein Druckausgleich erfolgt.To rule out that the liquid in the reaction chambers 27 and 28 can pass through the openings of the piston rods 23 and 24 in the cylinder 21 in the course of the operating time in the pressure chambers 25 and / or 26 and thus a free space in the reaction chambers 27 and 28 arise can, the reaction chambers 27 and 28 in the region of the piston rods 23 and 24 are each closed by a bellows 31 and 32 respectively. The bellows 31 and 32 are clamped at one end to the piston rods 23 and 24, with the other ends are attached to the cylinder 21. In addition, the spaces enclosed by the bellows 31 and 32 are 33 and 34 connected via holes 21 in the bore holes 35 and 36 connected to the pressure chambers 25 and 26, so that automatically a pressure equalization takes place.

Bei der in Figur 3 dargestellten Ausführungsvarianten sind die beiden Membranen 19, 20 der Membranpumpe 1 mit voneinander abgewandten Wölbungen 41' im äußeren Randbereich zwischen den Scheiben 37 und dem Zylinder 21 und im inneren Randbereich zwischen den Scheiben 38 und 39 eingespannt. Da die Reaktionsräume 27 und 28 ebenfalls vollständig mit einer Hydraulikflüssigkeit ausgefüllt und kommunizierend miteinander verbunden sind, ist ein Umklappen der Membranen 19 und 20 ebenfalls ausgeschlossen. Diese sind vielmehr an dem hydraulischen Gestänge H abgestützt.In the embodiment variants shown in FIG. 3, the two diaphragms 19, 20 of the diaphragm pump 1 are clamped with convexities 41 'facing away from one another in the outer edge area between the disks 37 and the cylinder 21 and in the inner edge area between the disks 38 and 39. Since the reaction spaces 27 and 28 are also completely filled with a hydraulic fluid and communicating with each other, a folding over of the membranes 19 and 20 is also excluded. These are rather supported on the hydraulic linkage H.

Mit der Membranpumpe 1 kann aufgrund der Fixierung der Membrane 19 und 20 durch das hydraulische Gestänge H der Spritzpistole 5 das zu verarbeitende Medium, da keine durch Umklappen der Membrane 19 und/oder 20 bedingten Veränderungen der Volumina der Druckräume 13 und 14 in Kauf zu nehmen sind, pulsationsfrei zugeführt werden. Auch sind die Membrane 19 und 20 nur Zugspannungen unterworfen, ein störungsfreier Dauerbetrieb der Membranpumpe 1 über einen langen Zeitraum ist demnach gewährleistet.With the diaphragm pump 1 can due to the fixation of the membrane 19 and 20 by the hydraulic linkage H of the spray gun 5, the medium to be processed, since no 19 and / or 20 caused by folding the membrane changes in the volumes of the pressure chambers 13 and 14 in purchasing are fed pulsation-free. Also, the membranes 19 and 20 are subjected to tensile stresses only, a trouble-free continuous operation of the diaphragm pump 1 over a long period of time is therefore ensured.

Claims (6)

Membranpumpe (1) mit zwei in einem Pumpengehäuse (11) eingesetzte auf ein zuförderndes flüssiges oder rieselfähiges Medium, z.B. eine Farbe, einwirkende Membrane (19, 20) , die mittels eines zwischen den Membranen (19, 20) angeordneten und beidseitig von einem Druckmittel wechselweise beaufschlagbaren Verstellkolben (22) betätigbar und die in den Randbereichen zweier mit diesem fest verbundenen Kolbenstangen (23, 24) abgestützt sind,
dadurch gekennzeichnet,
dass die beiden Membrane (19, 20) mit einer aufeinander zu gerichteten Wölbung (41) oder einer voneinanderr abgewandten Wölbung (41') mit ihren äußeren Randbereichen ortsfest in dem Pumpengehäuse (11) und mit ihren inneren Randbereichen an den verstellbaren Kolbenstangen (23, 24) eingespannt sind und dass die beiden zwischen den Membranen (19, 20) und einem den Verstellkolben (22) aufnehmenden Zylinder (21) jeweils gebildeten Reaktionsräume (27, 28) mit einem Hydraulikmedium ausgefüllt und über ein hydraulisches Gestänge (H) zwangläufig miteinander verbunden sind.Diaphragm pump (1) with two in a pump housing (11) used on a zuförderndes liquid or free-flowing medium, such as a color, acting membrane (19, 20) arranged by means of a between the membranes (19, 20) and on both sides of a pressure medium alternately acted adjusting piston (22) actuated and in the edge regions of two firmly connected to this piston rods (23, 24) are supported,
characterized,
in that the two diaphragms (19, 20) with a concavity (41) facing away from one another or a curvature (41 ') facing away from one another with their outer edge regions are fixed in the pump housing (11) and with their inner edge regions on the adjustable piston rods (23, 24) are clamped and that the two between the membranes (19, 20) and the adjusting piston (22) receiving cylinder (21) respectively formed reaction spaces (27, 28) filled with a hydraulic medium and a hydraulic linkage (H) are necessarily interconnected. Membranpumpe nach Anspruch 1,
dadurch gekennzeichnet, dass die das den Membranen (19, 20) zugeordnete hydraulische Gestänge (H) aufnehmende Reaktionsräume /27, 28) und die an diesen angeschlossenen Verbindungsleitungen (29) mit einem hydraulischen Medium vollständig befüllt und hermetisch abgedichtet ausgebildet sind.Diaphragm pump according to claim 1,
characterized in that the said the membranes (19, 20) associated hydraulic linkage (H) receiving reaction spaces / 27, 28) and connected to these connecting lines (29) are completely filled with a hydraulic medium and formed hermetically sealed. Membranpumpe nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass die das hydraulische Gestänge (H) bildende Hydraulikflüssigkeit von atmosphärischem Druck oder einem Unterdruck von bis zu 0,09 MPa beaufschlagt ist.Diaphragm pump according to claim 1 or 2,
characterized,
that the hydraulic linkage (H) forming the hydraulic fluid is acted upon by atmospheric pressure or a negative pressure of up to 0.09 MPa. Membranpumpe nach einem oder mehreren
der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
dass die die beiden Reaktionsräume (27, 28) der Membrane (19, 20) verbindende Leitung (29) durch einen Stopfen (30) fiüssigkeitsdicht verschlossen oder versiegelt ist.Diaphragm pump after one or more
of claims 1 to 3,
characterized,
in that the conduit (29) connecting the two reaction spaces (27, 28) of the membrane (19, 20) is sealed or sealed by a plug (30) in a liquid-tight manner. Membranpumpe nach einem oder mehreren der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
dass zur inneren Abdichtung der Reaktionsräume (27, 28) jeweils ein Faltenbalg (31, 32) vorgesehen ist, die mit einem Ende an dem Zylinder (21) und mit dem anderen Ende an den Kolbenstangen (23, 24) eingespannt sind.Diaphragm pump according to one or more of claims 1 to 4,
characterized,
in that in each case a bellows (31, 32) is provided for the internal sealing of the reaction spaces (27, 28), which are clamped at one end to the cylinder (21) and at the other end to the piston rods (23, 24). Membranpumpe nach Anspruch 5,
dadurch gekennzeichnet,
dass die von den Faltenbälgen (31, 32) jeweils eingeschlossenen Räume (33, 34) über eine oder mehrere in den Zylinder (21) eingearbeitete Öffnungen (35 bzw. 36) mit dem unmittelbar benachbarten Druckraum (25 bzw. 26) des Verstellkolbens (22) ständig verbunden sind.Diaphragm pump according to claim 5,
characterized,
in that the spaces (33, 34) respectively enclosed by the bellows (31, 32) are connected to the directly adjacent pressure chamber (25 or 26) of the adjusting piston (13) via one or more openings (35 or 36) incorporated into the cylinder (21). 22) are constantly connected.
EP05008040A 2005-04-12 2005-04-12 Diaphragm pump Not-in-force EP1712796B1 (en)

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DE502005000867T DE502005000867D1 (en) 2005-04-12 2005-04-12 diaphragm pump
AT05008040T ATE364790T1 (en) 2005-04-12 2005-04-12 DIAPHRAGM PUMP
EP05008040A EP1712796B1 (en) 2005-04-12 2005-04-12 Diaphragm pump
ES05008040T ES2288711T3 (en) 2005-04-12 2005-04-12 MEMBRANE PUMP.
KR1020060031229A KR101291316B1 (en) 2005-04-12 2006-04-06 Diaphragm pump
US11/400,581 US8123500B2 (en) 2005-04-12 2006-04-07 Diaphragm pump
JP2006108637A JP2006291957A (en) 2005-04-12 2006-04-11 Diaphragm pump
JP2009001922U JP3151123U (en) 2005-04-12 2009-03-30 Membrane pump

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DE502005000867D1 (en) 2007-07-26
US8123500B2 (en) 2012-02-28
ATE364790T1 (en) 2007-07-15
EP1712796B1 (en) 2007-06-13
ES2288711T3 (en) 2008-01-16
JP2006291957A (en) 2006-10-26
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