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EP0353133B1 - Alternative Kolbenpumpe, insbesondere mit Handantrieb - Google Patents

Alternative Kolbenpumpe, insbesondere mit Handantrieb Download PDF

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Publication number
EP0353133B1
EP0353133B1 EP89402081A EP89402081A EP0353133B1 EP 0353133 B1 EP0353133 B1 EP 0353133B1 EP 89402081 A EP89402081 A EP 89402081A EP 89402081 A EP89402081 A EP 89402081A EP 0353133 B1 EP0353133 B1 EP 0353133B1
Authority
EP
European Patent Office
Prior art keywords
extension
piston
membrane
pumping chamber
chamber
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
EP89402081A
Other languages
English (en)
French (fr)
Other versions
EP0353133A1 (de
Inventor
Patrick Jean Marie Ballu
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.)
Tecnoma SA
Original Assignee
Tecnoma SA
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 Tecnoma SA filed Critical Tecnoma SA
Publication of EP0353133A1 publication Critical patent/EP0353133A1/de
Application granted granted Critical
Publication of EP0353133B1 publication Critical patent/EP0353133B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F04B53/143—Sealing provided on the piston
    • 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
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • 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
    • F04B9/14—Pumps characterised by muscle-power operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C9/00—Oscillating-piston machines or pumps
    • F04C9/002—Oscillating-piston machines or pumps the piston oscillating around a fixed axis

Definitions

  • the present invention relates to a reciprocating piston pump, in particular actuable by hand.
  • the origin of the invention lies in research for the improvement of manual pumps for portable sprayers used in agriculture and horticulture, but the reader will understand, on reading the following, that the invention can find applications in many other areas.
  • the manual pumps currently used for sprayers are generally pumps of the type comprising a cylinder with circular section in which moves back and forth a piston, also circular, provided with a seal.
  • An actuating rod provided with a handle, is connected to the piston, and a guide part is provided on the cylinder to hold the rod coaxial with the cylinder.
  • intake and exhaust passages open into the piston, they are provided with valves arranged to allow the passage of the fluid only in one direction, namely towards the cylinder for the intake valve. , and towards the outside of the cylinder for the exhaust valve.
  • Such a device is so simple that it seems difficult to improve. However, it has the defect of forcing the operator to move the handle rectilinearly, and of the hand which actuates it. Such a movement is not natural, the human body being rather shaped to execute movements in a semicircle. This makes the guide part necessary, and causes unnecessary operator fatigue.
  • EP-A-0251948 describes a pump with rectilinear displacement of the piston, of the so-called "rolling membrane” type, that is to say where the seal between piston and cylinder is obtained using a membrane flexible, fixed by its periphery to the wall of the cylinder, and by its central zone to the front part of the piston, this membrane coming to bear, during the entire delivery stroke, on an external surface of the piston and / or on an internal surface of the cylinder while the piston is moving.
  • the piston is actuated by a crankshaft by means of a connecting rod articulated on the piston, and the latter has an enlarged part which is used for guidance by contact with an extension of the cylinder and which also carries a seal.
  • a pump comprising a diaphragm the central part of which is clamped between two discs not guided by friction and devoid of seals.
  • Pumps of this type due to the absence of bearing surfaces for the diaphragm and the large distance between the edges thereof and the edges of the discs, have a considerable dead volume and therefore have poor efficiency .
  • their stroke is reduced relative to the surface of the diaphragm. So they have a relatively low flow for a given discharge pressure, which is determined by the force of the operator and the resistance of the diaphragm.
  • the above document provides for actuating the pump using a lever system, but this does not change the relationship between pressure and flow.
  • the object of the present invention is to provide a pump of the type described in document EP-A-0251948 above which can be actuated by hand with very reduced fatigue, while retaining the favorable ratio of the flow rate to the discharge pressure. provided by this type of pump.
  • the piston and its jacket are calculated so as not to come into contact with said extension of the pumping chamber.
  • a torus is a surface generated by a closed planar curve rotating around a central axis located in the plane of said curve.
  • the closed planar curve may or may not meet the central axis.
  • torus segment is meant a part of a torus limited by two planes containing the central axis.
  • the pumping chamber and its extension are dismountably assembled, and the periphery of the membrane is clamped in the joint between the wall of said chamber and the wall of said extension.
  • the pivot axis of the piston is situated substantially in the plane of the joint, and this axis is carried by bearings which are in one piece with an element chosen from the pumping chamber and its extension.
  • said membrane has a thicker part, intended to be fixed to the front face of the piston, this part being offset from the center of the membrane to take into account the curvilinear shape of the trajectory.
  • the angular amplitudes of the displacement of the piston in the pumping chamber and in the extension are each about 10 to 40 °.
  • the stroke of the piston is at least 0.5 times and preferably 1.5 times its largest transverse dimension.
  • the pumping chamber can be of any shape. However, to reduce the dead volume, it is preferable that it as a whole has the shape of a torus segment which roughly continues the shape of the extension.
  • FIG. 1 shows a pump, intended for a spraying device, and designed to pass a liquid from an inlet duct 1 to a discharge duct 2.
  • the pump body 3 which is a part of complex shape, obtained by molding, comprises a pumping chamber 4, in the shape of a torus sector, open downward and extending over an arc of approximately 30 °.
  • the intake duct 1 is provided with an intake valve 5.
  • the exhaust duct 2 is provided with an exhaust valve 6.
  • the pump body carries two extensions 7, 8, which carry the bearings 9, 10 of the shaft 11 which carries the piston 12. These parts will be described later.
  • the chamber 4 is extended downwards by means of an extension 13, formed of a segment of O-tube, extending over approximately 30 °, and which carries on one of its ends a flange 14.
  • the lower edge of the chamber carries also a flange 15 provided externally with a thread 16.
  • a clamp 17, internally threaded clamps the flanges 14 and 15 against each other, by screwing onto the thread 16.
  • a membrane 18, which s extends into the chamber 4, is clamped by its edges between the flanges 14 and 15. This membrane 18 which is an important element of the pump, is present, before assembly, in the form of a plane provided, roughly in its central part, with a thicker part 19.
  • This thicker part carries, on one of its faces, two studs 20 and 21 provided with snap projections 22.
  • the piston 12 in the form of a disc, has two holes intended for receive the pins 20 and 21, and thus fix the membrane on the piston for its entry ment.
  • the piston 12 carries a jacket 23, in the shape of a torus segment, extend over approximately 45 °, and provided with a flat upper part 24 which comes to rest on the piston, and which is also provided with holes for the nipples 20 and 21.
  • This jacket 23, immobilized against the piston 12 by the nipples 20, 21, with their latching projections 22, is prevented by them to rotate relative to the axis of the piston.
  • the piston 12 is carried by a piston rod 25, with cross section, and in the shape of an arc of a circle. At its end opposite the piston, the rod 25 is secured to an arm 26, which is substantially perpendicular to it.
  • the arm 6 is crossed by a square bore 27, of dimensions adapted to the shaft 11, which is itself of square section.
  • Bearings 28 and 29 are placed between the shaft 11 and the bearings 9 and 10. These bearings have a cylindrical outer surface of revolution, adapted to that of the bearings and 10, and an internal bore with square section, adapted to that of the tree 11.
  • the shaft 11 can slide in the bearings 28, 29 and in the bore 27 of the arm 26. It can in particular be disassembled, for transport, pushed in to reduce the size of the assembly, or placed in another position allowing easy activation.
  • the bearings 28, 29 each carry a male conical extension 20, onto which a tubular adjustment rod 31 can be screwed, the end of which is also conical.
  • the screwing of the adjustment rod 31 serves to tighten the extensions 30 against the shaft 11, and to immobilize it in position, the bearings being themselves immobilized in axial position by the bearings 9 and 10 and the arm 26.

Landscapes

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

Claims (6)

1. Pumpe mit
- einer Pumpkammer (4) mit Einlaß- und Auslaßöffnungen (1,2), die mit Klappen versehen sind,
- einer verformbaren Membran (18), die an ihrer Peripherie derart mit der Wand der Pumpkammer verbunden ist, daß diese dicht abgeschlossen ist,
- einer Kammer-Verlängerung (13), die durch eine Einfassung gebildet ist, welche an einem Ende offen ist und am anderen Ende durch die verformbare Membran von der Pumpkammer getrennt ist, und die eine Stützfläche aufweist, auf der die Membran in Anlage kommen kann,
- einem in der Pumpkammer und der Verlängerung hin- und herbewegbaren Kolben (12), der eine Stirnfläche hat, die mit einem im wesentlichen zentralen Bereich der Membran fest verbunden ist, und der fest mit einem Mantel (23) verbunden ist, welcher im wesentlichen die gleiche Form wie die Verlängerung und geringfügig kleineren Querschnitt hat, welcher sich ausgehend von seiner Stirnfläche entgegengesetzt zur Pumpkammer erstreckt und welcher eine Stützfläche für die Membran aufweist, wobei diese Stützfläche etwas kleineren Querschnitt als die Verlängerung hat und von der Stützfläche der Verlängerung in Breitenrichtung durch einen Zwischenraum getrennt ist, der nahezu konstant und größer als das Doppelte der Dicke der Membran ist,
dadurch gekennzeichnet, daß
- die Verlängerung (13) die Form eines Kreisringsegments hat, dessen Mittelachse weder die Pumpkammer noch deren Verlängerung kreuzt,
- der Kolben von einer starren Halterung (25,26) gehalten ist, die fest mit einem Handbetätigungshebel (32) verbunden und mittels Schwenkeinrichtungen (9,10) um die Mittelachse des der Verlängerung entsprechenden Kreisrings schwenkbar ist,
- die Schwenkeinrichtungen (9,10) so ausgelegt sind, daß sie Drehung des Kolbens um die Achse ohne weitere Führungsmittel zulassen, wobei die Breite der Zwischenräume zwischen den Stützflächen der Verlängerung der Kammer und des Mantels im wesentlichen konstant gehalten ist.
2. Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Pumpkammer und ihre Verlängerung lösbar zusammengefügt sind und die Peripherie der Membran in der Anschlußzone zwischen der Wand der Kammer und der Wand der Verlängerung eingespannt ist.
3. Pumpe nach Anspruch 2, dadurch gekennzeichnet, daß die Schwenkachse des Kolbens im wesentlichen in der Ebene der Anschlußzone angeordnet und durch Lager (9,10) gehalten ist, die mit einem Element entweder der Pumpkammer oder ihrer Verlängerung einstückig ausgebildet sind.
4. Pumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Membran (18) einen zur Befestigung an der Stirnfläche des Kolbens vorgesehenen verdickten Bereich (19) aufweist, der in bezug auf das Zentrum der Membran so versetzt ist, daß die gekrümmte Form der Bewegungsbahn berücksichtigt wird.
5. Pumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die winkeligen Ausschlagweiten der Kölbenverschiebung in der Pumpkammer und in der Verlängerung jeweils im Bereich von 10° bis 40° liegen.
6. Pumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Hub des Kolbens mindestens dem 0,5 fachen seiner größten Querabmessung gleich ist.
EP89402081A 1988-07-28 1989-07-21 Alternative Kolbenpumpe, insbesondere mit Handantrieb Expired - Lifetime EP0353133B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8810179A FR2634826A1 (fr) 1988-07-28 1988-07-28 Pompe a piston a mouvement alternatif, notamment a actionnement manuel
FR8810179 1988-07-28

Publications (2)

Publication Number Publication Date
EP0353133A1 EP0353133A1 (de) 1990-01-31
EP0353133B1 true EP0353133B1 (de) 1992-05-06

Family

ID=9368869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402081A Expired - Lifetime EP0353133B1 (de) 1988-07-28 1989-07-21 Alternative Kolbenpumpe, insbesondere mit Handantrieb

Country Status (5)

Country Link
EP (1) EP0353133B1 (de)
DE (1) DE68901425D1 (de)
ES (1) ES2031697T3 (de)
FR (1) FR2634826A1 (de)
OA (1) OA09083A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2302370B (en) * 1994-11-25 1999-07-14 Thomas Joseph Carroll Oscillating piston machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB509916A (en) * 1936-10-23 1939-07-24 Magg & Co Ing Improvements in and relating to single-acting plunger pumps
FR1137097A (fr) * 1955-11-25 1957-05-23 Pompe à soufflets
BE757880A (fr) * 1969-10-23 1971-04-22 Rhone Poulenc Sa Pompe a piston torique
GB1294676A (en) * 1969-12-19 1972-11-01 Munster Simms Eng Ltd Improvements in or relating to diaphragm pumps
GB1603302A (en) * 1977-05-13 1981-11-25 Price Dev Ltd E Foot pumps
FR2600723B3 (fr) * 1986-06-26 1988-08-26 Berthoud Sa Pompe a piston a membrane a deroulement.

Also Published As

Publication number Publication date
FR2634826A1 (fr) 1990-02-02
ES2031697T3 (es) 1992-12-16
OA09083A (en) 1991-10-31
EP0353133A1 (de) 1990-01-31
DE68901425D1 (de) 1992-06-11

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