EP2058517B1 - Pompe - Google Patents
Pompe Download PDFInfo
- Publication number
- EP2058517B1 EP2058517B1 EP07120132A EP07120132A EP2058517B1 EP 2058517 B1 EP2058517 B1 EP 2058517B1 EP 07120132 A EP07120132 A EP 07120132A EP 07120132 A EP07120132 A EP 07120132A EP 2058517 B1 EP2058517 B1 EP 2058517B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- inner chamber
- pump
- cavity
- fluid
- 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.)
- Not-in-force
Links
- 239000012528 membrane Substances 0.000 claims abstract description 59
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 239000000314 lubricant Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000009825 accumulation Methods 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000015556 catabolic process Effects 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
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010413 gardening Methods 0.000 description 1
- 230000002363 herbicidal effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000361 pesticidal effect Effects 0.000 description 1
- 239000004476 plant protection product Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual 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
- 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
-
- 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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
- F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
Definitions
- the present invention relates to a pump.
- the present invention relates to a membrane pump.
- the present invention can be advantageously used in the agricultural and/or gardening sector.
- Membrane pumps consisting of a plurality of chambers intended to pump a fluid are known.
- the arrangement of the chambers may vary depending on the type of pump employed and may have a circumferential, radial or in-line layout.
- Each pump has a number of pumping chambers which may vary from at least one to a plurality of chambers, each having a movable deformable membrane.
- the said deformable membrane is movable between a first operative position where the same, reaching a top dead centre, favours delivery of a fluid, and a second operative position where the same, reaching a bottom dead centre, favours intake of a fluid.
- the chamber therefore has a variable volume.
- Each chamber has an inlet opening, which forms the intake mouth, and an outlet opening, which forms the delivery mouth. Both the intake mouth and the delivery mouth are provided with a respective one-way valve.
- Each movable membrane is connected to suitable movement means.
- these movement means consist of a driving shaft arranged along a central axis of the pump.
- a cam is situated in the vicinity of a central portion of the shaft and has a connecting rod connected thereto.
- the connecting rod is connected to a piston by means of a pin.
- the movement means impart an alternating linear movement to the membrane.
- This membrane may be connected directly to the piston or may be connected to a first disk situated between the membrane and the piston.
- the pump also comprises a second disk connected to the membrane and lying entirely inside the chamber, thus defining a movable wall.
- the second disk facilitates recall of the membrane when the same reaches the bottom dead centre.
- the pumps of the known type also comprise a main containing body for enclosing the movement means. This containing body defines an inner chamber.
- the movement means are housed inside the inner chamber in a lubricating bath in order to ensure the necessary lubrication of the said means.
- the piston displaces the membrane from the top dead centre, further away from the inner chamber, to the bottom dead centre, closer to the inner chamber. In this way, the volume of the chamber increases and a vacuum is created inside the chamber itself. A fluid then enters from the intake mouth into the chamber through the one-way intake valve.
- document US 2007/0140878 A1 discloses a pump comprising a head-piece, a containing body and a membrane pinched between them and connected with means for executing reciprocating motion.
- the membrane defines, together with the head-piece, a main chamber for pumping a fluid and, together with the containing body, an inner chamber filled with lubricant.
- a refilling duct is provided in the containing body, which comes from an oil sump and opens out into the inner chamber via a lift-off valve.
- document US 3,680,981 describes a pump comprising a main chamber fed with liquid to be pumped, an inner chamber partially filled with lubricant and a membrane separating these chambers from each other.
- the inner chamber is partially filled with lubricant to which driving pressure is intermittently applied and relieved by means of a cylindrical piston driven by a rotating wobble plate.
- the inner chamber communicates with a container for the lubricant by means of a refill passage and an overflow passage containing a pressure limiting valve.
- the membrane being subject to a continuous compression and expansion cycle, may break as a result of wear.
- the membrane is the sole separating part between, the lubricant, contained in the inner chamber, and the pumped fluid, contained in the main chamber, the breakage thereof results in mixing of the lubricant and the pumped fluid, causing serious damage to the entire pump and subsequently producing the complete break-down thereof.
- the lubricant contained in the inner chamber flows out, following tearing of the membrane, lubrication of the movement means is limited considerably, causing serious damage to the said means.
- Mixing of the lubricant with the pumped fluid also causes contamination of the latter, resulting in a significant wastage of fluid.
- the pumping fluids may contain plant protection products or other herbicidal/pesticidal agents, breakage of the membrane results in the concentrated dispersion in the environment of the pumped liquid, causing serious environmental pollution.
- the technical object of the present invention is to propose a pump which does not possess the disadvantages of the pumps of the prior art.
- the object of the present invention is to provide a pump in which, following breakage of the membrane, there is no mixing between the lubricating substance and the pumped fluid.
- Another object of the present invention is to provide a pump in which, following breakage of the membrane, the wastage of fluid and at the same time the dispersion thereof is significantly reduced.
- a further object of the present invention is to provide a pump which ensures a constant lubricating efficiency even following breakage of the membrane.
- 1 denotes overall a pump according to the present invention.
- the pump 1 comprises a containing body 2 and a closing flange 3 which define an inner chamber 4 containing a lubricant.
- the pump 1 also comprises at least one main chamber 5.
- the pump 1 comprises a variable number of main chambers 5.
- the latter may be arranged in circular fashion, linearly or in other arrangements.
- the main chambers 5 are arranged in circular fashion around a central axis "X" of the pump 1 and are spaced equidistantly from each other.
- Each main chamber 5 comprises an intake mouth 6 provided with an associated one-way valve 7 and a delivery mouth 8 provided with an associated one-way valve 9. The fluid which must be pumped flows between the intake mouth 6 and the delivery mouth 8.
- the main chamber 5 also comprises a flexible membrane 10 which isolates the inner chamber 4 and the main chamber 5 itself from each other. Moreover, the membrane 10 is deformable and movable between a top dead centre and a bottom dead centre. In other words, the membrane 10 is movable between a first operative position further away from the inner chamber 4 and a second operative position closer to the inner chamber 4.
- Each main chamber 5 is delimited at the bottom by the membrane 10 and at the top by a head-piece 11 connected to the containing body 2.
- each main chamber 5 has a semispherical shape and the membrane 10 is fixed between the main body 2 and the head-piece 11.
- the membrane 10 has a circular shape.
- the main chamber 5 has a variable volume.
- a vacuum is created inside the main chamber 5 and draws the fluid inside the pump 1.
- an overpressure is created inside the main chamber 5 and pushes the fluid outside the pump 1.
- the pump 1 also comprises movement means 12 which are operationally connected to the membrane 10 and cause displacement of the membrane 10 movable between the first and second operative position.
- the movement means 12 are connected to a movable wall 13 associated with the membrane 10.
- the movable wall 13 comprises a first disk 14 arranged concentrically with the membrane 10 and situated on the opposite side to the main chamber 5.
- the movable wall 13 also comprises a second disk 15 arranged concentrically with the membrane 10 and the first disk 14 and contained entirely inside the main chamber 5.
- the membrane 10 is arranged between the first disk 14 and the second disk 15.
- the movement means 12 comprises a shaft 16 which is associated with a motor (not shown) and which extends along the central axis "X" and a piston 17 associated with the membrane 10.
- the driving shaft 16 is supported on the containing body 2 and on the closing flange 3 by means of first ball bearings 18.
- a connecting rod 19 is provided, being connected, respectively, to the piston 17, by means of a pin 20, and to a cam 21, by means of second ball bearings 22.
- the movable wall 13 is fixed to the piston 17 by means of a screw 23.
- the pump 1 also comprises sealing means 24 which define at least one cavity 25 in association with the membrane 10.
- the cavity 25 is defined by the membrane 10 as well as by the said sealing means 24. Therefore, the pump 1 comprises at least one cavity 25 associated with each main chamber 5.
- the sealing means 24 have the function of isolating the cavity 25 from the inner chamber 4. In this way it is not possible for the pumped fluid to mix with the lubricant in the event of breakage of the membrane 10.
- the sealing means 24 are defined by a seal 26 which is arranged between the containing body 2 and the piston 17 and inside which the piston 17 is seated, in order to isolate the cavity 25 and the inner chamber 4 from each other.
- the pump 1 has at least one hole 27 which facilitates the fluid communication between the cavity 25 and the exterior of the pump 1.
- the hole 27 is formed in the containing body 2 opposite the cavity 25.
- the hole 27 allows the passage of air which is drawn in or pumped during the movement of the membrane 10.
- the hole 27 allows the outflow of the pumped fluid which seeps out from the main chamber 5 into the cavity 25. In this way the outflowing fluid is prevented from being able to break the seal 26, thus allowing mixing of the pumped fluid with the lubricant.
- the pump 1 may also have, in the vicinity of the cavity 25, at least one tank 28 for collecting the fluid, communicating therewith via the hole 27.
- the pump 1 may comprise at least one tank 28 associated with each cavity 25.
- the pump 1 may comprise a single tank 28 situated so as to be connected to each cavity 25.
- the tank 28 is formed along a side edge of the containing body 2.
- the tank 28 is formed by means of suitable shaping of the containing body 2.
- the storage tank 28 therefore has an annular shape.
- the tank 28 also comprises a cover 29 which is connected directly to the containing body 2.
- the tank 28 is also associated with a sensor 30 for detecting the presence of fluid in the tank 28.
- This sensor 30 detects the presence of fluid in the tank 28.
- the sensor 30 is advantageously connected to an acoustic or visual signalling system (not shown). Therefore, in the event of the membrane 10 associated with one of the main chambers 5 tearing and the tank 28 being filled with fluid, the signalling system signals the breakage of the membrane 10 which has occurred.
- the storage tank 28 comprises a pipe 31 which prevents the accumulation of fluid in the tank 28. This pipe 31 is formed in the vicinity of a bottom portion 29a of the cover 29.
- the present invention achieves the objects proposed and results in significant advantages.
- the presence of the sealing means 24 prevents mixing of the pumped fluid with the lubricant contained in the inner chamber 4.
- the pumped fluid which flows out of the main chamber 5 passes into the cavity 25.
- the seal 26 prevents this fluid from penetrating into the inner chamber 4 and being mixed with the lubricant. Consequently, a further advantage which is obtained is that relating to the fact that, owing to the presence of the tank 28, any wastage of the pumped fluid is avoided, preventing moreover the latter from being dispersed into the surrounding environment, causing environmental pollution.
- the sealing means 24 and the hole 27 ensure that the lubricant remains confined inside the inner chamber 4 and cannot flow out even following breakage of the membrane 10. In this way, the constant and efficient lubrication of the movement means 12 is ensured.
- the presence of the sensor 30 allows rapid detection of a breakage of the membrane 10. The operator may therefore take prompt action and limit generally the damage.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Fluid-Driven Valves (AREA)
- Eye Examination Apparatus (AREA)
Claims (8)
- Pompe, comprenant:- un corps de confinement (2) et une bride (3) de fermeture qui définissent une chambre interne(4) contenant un lubrifiant ;- au moins une chambre principale (5) délimitée inférieurement par une membrane (10) et supérieurement par une tête (11) reliée audit corps de confinement (2) et comprenant une embouchure d'aspiration (6) et une embouchure de refoulement (8) pour un fluide ; la chambre principale (5) comprenant ladite membrane flexible (10), isolant réciproquement la chambre principale (5) et la chambre interne (4), mobile entre une première position fonctionnelle d'éloignement de la chambre interne (4) et une deuxième position fonctionnelle de rapprochement de la chambre interne (4) ;- des moyens de déplacement (12), contenus au moins en partie dans la chambre interne (4), actifs sur la membrane mobile (10) pour déplacer la membrane mobile (10) ; lesdits moyens de déplacement (12) comprenant au moins un piston (17) relié, par le biais d'une paroi mobile (13), à ladite membrane (10) pour guider cette dernière entre la première position fonctionnelle et la deuxième position fonctionnelle ;
caractérisée en ce qu'elle comprend :- des moyens d'étanchéité (24) définis par un joint (26), disposé entre ledit corps de confinement (2) et ledit piston (17), recevant à l'intérieur de celui-ci ledit piston (17) ; lesdits moyens d'étanchéité (24) définissant conjointement à ladite membrane (10) un espace intermédiaire (25), interposé entre la chambre interne (4) et la chambre principale (5), capables d'isoler ledit espace intermédiaire (25) par rapport à ladite chambre interne (4) ;- au moins un trou (27) ménagé dans le corps de confinement (2) en correspondance de l'espace intermédiaire (25) pour favoriser la communication de fluide entre l'espace intermédiaire (25) et l'extérieur de la pompe. - Pompe selon la revendication 1, caractérisée en ce que la paroi mobile (13) comprend un premier disque (14) et un deuxième disque (15) appuyés sur des côtés opposés de la membrane (10) ; la paroi mobile (13) étant fixée au piston (17) au moyen d'une vis (23).
- Pompe selon la revendication 1, caractérisée en ce qu'elle comprend en outre au moins un réservoir (28) de récupération du fluide placé à proximité de l'espace intermédiaire (25) et communiquant avec celui-ci à travers le trou (27).
- Pompe selon la revendication 3, caractérisée en ce que le réservoir (28) comprend en outre un couvercle (29) ; le couvercle (29) comprenant en outre un conduit (31) pour éviter l'accumulation de fluide dans le réservoir (28).
- Pompe selon la revendication 3, caractérisée en ce qu'elle comprend en outre un capteur (30) pour détecter la présence d'un fluide dans le réservoir (28).
- Pompe selon la revendication 1, caractérisée en ce que les moyens de déplacement (12) comprennent en outre un arbre moteur (16) disposé suivant un axe central (X) de la pompe (1) muni d'un excentrique (21) placé dans une portion centrale de l'arbre (16).
- Pompe selon la revendication 6, caractérisée en ce que les moyens de déplacement (12) comprennent en outre au moins une bielle (19) reliée au piston (17) au moyen d'une goupille (20) ; la bielle (19) étant reliée à l'excentrique (21).
- Pompe selon la revendication 1, caractérisée en ce qu'elle comprend une pluralité de chambres principales (5) angulairement équidistantes ; les chambres principales (5) étant reliées au réservoir (28).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07120132A EP2058517B1 (fr) | 2007-11-07 | 2007-11-07 | Pompe |
DE602007009120T DE602007009120D1 (de) | 2007-11-07 | 2007-11-07 | Pumpe |
AT07120132T ATE480712T1 (de) | 2007-11-07 | 2007-11-07 | Pumpe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07120132A EP2058517B1 (fr) | 2007-11-07 | 2007-11-07 | Pompe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2058517A1 EP2058517A1 (fr) | 2009-05-13 |
EP2058517B1 true EP2058517B1 (fr) | 2010-09-08 |
Family
ID=39068996
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07120132A Not-in-force EP2058517B1 (fr) | 2007-11-07 | 2007-11-07 | Pompe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2058517B1 (fr) |
AT (1) | ATE480712T1 (fr) |
DE (1) | DE602007009120D1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103688055A (zh) * | 2011-07-01 | 2014-03-26 | 罗伯特·博世有限公司 | 用于传输介质的薄膜 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1399534B1 (it) * | 2010-04-22 | 2013-04-19 | Bertolini Idromeccanica | Pompa alternativa |
IT1399533B1 (it) * | 2010-04-22 | 2013-04-19 | Bertolini Idromeccanica | Pompa alternativa |
DE102015205060A1 (de) * | 2015-03-20 | 2016-09-22 | Continental Teves Ag & Co. Ohg | Motorpumpenaggregat mit einer Membraneinheit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3680981A (en) | 1970-12-21 | 1972-08-01 | Josef Wagner | Pump and method of driving same |
US4682937A (en) * | 1981-11-12 | 1987-07-28 | The Coca-Cola Company | Double-acting diaphragm pump and reversing mechanism therefor |
US5165869A (en) * | 1991-01-16 | 1992-11-24 | Warren Rupp, Inc. | Diaphragm pump |
FR2895036B1 (fr) | 2005-12-20 | 2008-02-22 | Milton Roy Europ Sa | Pompe a membrane a actionnement hydraulique avec dispositif de compensation des fuites |
-
2007
- 2007-11-07 DE DE602007009120T patent/DE602007009120D1/de active Active
- 2007-11-07 EP EP07120132A patent/EP2058517B1/fr not_active Not-in-force
- 2007-11-07 AT AT07120132T patent/ATE480712T1/de not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103688055A (zh) * | 2011-07-01 | 2014-03-26 | 罗伯特·博世有限公司 | 用于传输介质的薄膜 |
Also Published As
Publication number | Publication date |
---|---|
DE602007009120D1 (de) | 2010-10-21 |
EP2058517A1 (fr) | 2009-05-13 |
ATE480712T1 (de) | 2010-09-15 |
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