EP4050213A1 - Pompe à membranes multiples - Google Patents

Pompe à membranes multiples Download PDF

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Publication number
EP4050213A1
EP4050213A1 EP22152137.0A EP22152137A EP4050213A1 EP 4050213 A1 EP4050213 A1 EP 4050213A1 EP 22152137 A EP22152137 A EP 22152137A EP 4050213 A1 EP4050213 A1 EP 4050213A1
Authority
EP
European Patent Office
Prior art keywords
piston
valve
cage
propellant
membrane
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
EP22152137.0A
Other languages
German (de)
English (en)
Other versions
EP4050213B1 (fr
EP4050213C0 (fr
Inventor
Takumi Nasu
Alexander Ries
Andrej Getze
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.)
Lutz Pumpen GmbH
Original Assignee
Lutz Pumpen GmbH
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 Lutz Pumpen GmbH filed Critical Lutz Pumpen GmbH
Publication of EP4050213A1 publication Critical patent/EP4050213A1/fr
Application granted granted Critical
Publication of EP4050213B1 publication Critical patent/EP4050213B1/fr
Publication of EP4050213C0 publication Critical patent/EP4050213C0/fr
Active 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
    • F04B43/06—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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L25/00—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
    • F01L25/08—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by electric or magnetic means
    • 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
    • F04B43/023—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms double acting plate-like flexible member

Definitions

  • the present invention relates to a multiple membrane pump with at least two membrane chambers, which are divided by at least two membranes into a propellant chamber and a media chamber, a membrane piston mechanically coupling the membranes, being guided into a switch housing and in the switch housing with the interposition of a magnet arrangement with a valve piston interacts to control an inflow and outflow of propellant into the propellant chambers.
  • Such a multiple diaphragm pump is already known as a double diaphragm pump DE 41 06 180 A1 previously known.
  • radially arranged ring magnets aligned in the same direction are positioned on the interacting end pieces of the membrane piston and the valve piston on the membrane piston and the valve piston.
  • the diaphragm piston and the valve piston work in opposite directions, in that the valve piston is pressed by the existing magnetic field of the diaphragm piston in the opposite direction of the passing diaphragm piston. Due to the oscillating movement of the mechanically driven diaphragm piston, the poles of the radial magnets of both pistons with the same name periodically come into a parallel position.
  • the magnetic field of the valve piston gives way to the resistance that builds up as a result of the approaching poles of the same name, as the ring magnets move the valve piston into a position relative to the diaphragm piston.
  • the opposite poles of the ring magnets of the diaphragm piston exert maximum attraction with the respective opposite poles of the valve piston.
  • the present invention is based on the object of specifying a multi-diaphragm pump in which the magnetic forces can be used more efficiently through a different distribution on the two pistons in order to prevent the multi-diaphragm pump from stopping at a common dead center of the diaphragm piston and valve piston.
  • the membranes each divide a membrane chamber into a propellant chamber and a media chamber.
  • the membrane piston transfers part of its movement to the valve piston within a switching housing by entrainment of the valve piston.
  • This entrainment of the valve piston activates a valve which is arranged at the end of the valve piston and which switches back and forth between two switching positions and thereby controls the inflow and outflow of the propellant into the propellant chambers.
  • part of the distance is overcome magnetically.
  • the common dead center of the two pistons is located on this section. Dead center is a position of the pistons from which the multiple diaphragm pump can no longer get out of its own power, so that external intervention is required.
  • valve piston is guided coaxially with the diaphragm piston, or at least parallel to it.
  • the force of the membrane piston can be used directly for a mechanical actuation of the valve piston, although no rigid coupling is implemented in such a case. Rather, mechanical entrainment is provided in such an arrangement, which, however, allows play between the valve piston and the diaphragm piston.
  • the offset of the valve piston can in particular be greater than the offset of the diaphragm piston.
  • a time offset between the movements of the valve piston and the diaphragm piston can also be made possible in this way, as a result of which the valve remains in a defined position even during the movement of the diaphragm piston.
  • one of the two pistons can form a head piece, which is accommodated in a cage formed by the other of the two pistons, the head piece and the cage forming front and rear stop surfaces in the thrust direction and in the pull direction, with a stop surface between the head piece and the cage stop surfaces game is present.
  • the free end of the valve piston can preferably be formed as a cage, while the free end of the membrane piston interacting with the valve head piece in the push and pull direction forms a head piece which is longitudinally movable in the cage.
  • first magnet arrangements can be assigned to the cage stop surfaces and at least one second magnet arrangement can be assigned to the head piece, which is oriented in the opposite direction to the first magnet arrangements. This means that the cage and head piece collide just before the end position of the cage off. The head piece then pushes the cage both mechanically and magnetically into a stop position of the cage.
  • the inner walls of the cage can serve as abutment surfaces for corresponding abutment surfaces of the head piece.
  • the membrane piston is moved by the membranes, which are deflected due to the inflow and outflow of propellant, so that the head piece and cage move relative to one another. While the valve piston initially remains at rest and the valve thus retains its position, the head piece traverses the cage and on its opposite side again comes up against the stop surfaces there. From this moment on, the valve piston is mechanically driven by the diaphragm piston.
  • the cage moving in the switch housing of the multiple membrane pump can also be arranged to be displaceable between two housing stop surfaces. This allows the cage to be fixed between two extreme points of movement and to ensure that the cage is always in a defined position within the switch housing.
  • third magnet arrangements aligned in the same direction as the first magnet arrangements can be provided in the housing stop surfaces, which pull the first magnet arrangements in the cage stop surfaces toward you, possibly helping to overcome the last part of the way to the housing stop surfaces.
  • the outer cage stop surfaces are attracted to the housing stop surfaces as soon as the head piece with the pole of the same name pushes off the cage from the inside and the cage is moved towards the housing stop by the magnetic force.
  • the cage is both by the repulsion of poles of the same name from the inside as the attraction of opposite poles from the outside also moves beyond the dead center of the valve piston.
  • valve piston actuates a valve arrangement, preferably a 5/2-way valve, for controlling the flow of propellant into the propellant chambers.
  • the 5/2-way valve can be attached to the other end of the valve piston in order to ensure the inflow and outflow of the propellant into and out of the propellant chambers of the double diaphragm pump.
  • the inflow and outflow of the propellant in both propellant chambers can be controlled simultaneously, with one propellant chamber being filled with the propellant while the propellant can escape from the other chamber at the same time.
  • the magnet arrangements can be constructed from one or more magnets arranged in the same direction as one another, in particular spatially distributed.
  • the poles of all magnet arrangements that share a stop surface can be oriented either parallel or perpendicular to the direction of movement, as long as the same direction or opposite direction described above is guaranteed, which is required in order to use the applied magnetic fields to move the valve piston.
  • a correspondingly thicker head piece it can be useful to arrange a magnet on both sides of the head piece, which then together form the magnet arrangement. This can be transferred accordingly to the other stop surfaces. This also makes it possible to simply strengthen the magnets.
  • the magnets are permanent magnets, in particular neodymium magnets, which are preferably designed in the form of ring magnets. Choosing neodymium magnets ensures that the magnetic force is sufficient to mobilize the valve piston. In addition, a permanent magnet works without interference Interruption, which contributes to the stability of the construction and makes it maintenance-free.
  • compressed air can be used as a cheap propellant. This gas is available everywhere free of charge and only needs to be compressed. It is also particularly advantageous because it does not corrode the propellant chambers and diaphragms and is both quick and easy to move.
  • figure 1 shows a double diaphragm pump 1, which has two diaphragm chambers 2 and 6.
  • the membrane chambers 2 and 6 are each divided into a propellant chamber 4 and 8 and a media chamber 3 and 7 with the aid of a membrane 5 and 9 .
  • Compressed air is fed from a propellant source 16 via a valve arrangement 15, which is designed as a 5/2-way valve, into the second propellant chamber 8, with the aim of moving a second membrane 9 against the pressure in the second medium chamber 7 of the medium contained in the direction of the second To move media chamber 7 and thereby promote the medium from the second media chamber.
  • the second membrane 9 is coupled to a first membrane 5 via a membrane piston 17 and entrains this in its movement, so that the first membrane 5 conveys the propellant contained there from the first propellant chamber 4 via the valve arrangement 15 out of the first propellant chamber 4. Conversely, this expands the first media chamber 3 and as a result sucks any medium that is present into it.
  • valve position of the valve assembly 15 is actuated by a valve piston 10, which is in a mechanical connection with the diaphragm piston 17, as shown in FIG figure 5 is shown.
  • figure 2 shows the subsequent step in which the membranes 5 and 9 are deflected in the opposite direction, such play and time offset being provided between the membrane piston 17 and the valve piston 10 that the valve arrangement 15 is still in its previous position at this point in time.
  • figure 3 shows the next step, in which the valve arrangement 15 has now switched, so that the 5/2-way valve now has the first propellant chamber 4 with it Compressed air supplied, while the membranes 5 and 9 now begin to displace the medium from the first media chamber 3 and the compressed air from the second propellant chamber 8.
  • FIG 5 shows the interior of the switch housing 21 responsible for the switching behavior, into which the diaphragm piston 17 protrudes from the left side and the valve piston 10 protrudes from the right side.
  • the free end of the membrane piston 17 forms a head piece 19 which is received in a cage 13 at the free end of the valve piston 10 .
  • the head piece 19 has play within the cage 13, similar to a cylinder piston in its cylinder, so that a movement of the diaphragm piston 17 only has a direct effect on the movement of the valve piston 10 if the head piece 19 with its head piece stop surfaces 20 is in contact with a cage stop surface 14 of the Cage 13 strikes and presses in the direction.
  • the diaphragm piston 17 can move the valve piston 10 into a switching position in which the cage 13 of the valve piston 10 strikes the housing stop faces 22 of the housing 21 . Normally, however, this position is not reached due to the movement of the diaphragm piston 17 alone; rather, it may be that the valve piston 10 stops at a dead center shortly before the switching position, in which the valve is not in a clear switching position and the diaphragm piston 17 is due to itself the lack of pressure in the membrane chambers 2 and 6 also no longer moves.
  • 22 magnet arrangements 11, 18 and 23 are provided in the cage 13, the head piece 19 and the housing stop surfaces, which should avoid such a dead center.
  • first magnet arrangements 11 are arranged in the same direction in the cage and third magnet arrangements 23 in the housing stop surfaces, so that they attract each other. If necessary, the third magnet arrangements can also be dispensed with, but in its end position they again magnetically pull the cage 13 towards the housing stop surfaces 22 and thereby help to overcome the undefined dead center position.
  • a second magnet arrangement 18 aligned in opposite directions ensures that the cage 13 is pressed further in the direction of the end position at the end points, since poles of the same name point to one another and repel one another.
  • a multiple membrane pump is thus described above, in which the magnetic forces can be used more efficiently due to the distribution of the magnets on the two pistons, in order to avoid the standstill of the multiple membrane pump in a common dead center of membrane piston and valve piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP22152137.0A 2021-02-25 2022-01-19 Pompe à membranes multiples Active EP4050213B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021104548.7A DE102021104548A1 (de) 2021-02-25 2021-02-25 Mehrfachmembranpumpe

Publications (3)

Publication Number Publication Date
EP4050213A1 true EP4050213A1 (fr) 2022-08-31
EP4050213B1 EP4050213B1 (fr) 2023-06-07
EP4050213C0 EP4050213C0 (fr) 2023-06-07

Family

ID=79730195

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22152137.0A Active EP4050213B1 (fr) 2021-02-25 2022-01-19 Pompe à membranes multiples

Country Status (6)

Country Link
US (1) US20220268267A1 (fr)
EP (1) EP4050213B1 (fr)
CN (1) CN114962228A (fr)
DE (1) DE102021104548A1 (fr)
ES (1) ES2951280T3 (fr)
PL (1) PL4050213T3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1453607A1 (de) * 1962-11-05 1972-10-26 Panther Pumps & Equipment Co Membranpumpe
DE4106180A1 (de) 1990-10-08 1992-04-09 Dirk Dipl Ing Budde Doppel-membranpumpe
DE69302656T2 (de) 1992-10-29 1997-02-06 Nordson Corp Anordnung für Druckmittelmotor mit Kolben
DE19738779A1 (de) * 1997-09-04 1999-03-18 Almatec Maschinenbau Gmbh Umsteuerventil für eine Druckluftmembranpumpe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8801423D0 (sv) * 1988-04-18 1988-04-18 Dominator Ab Pneumatisk ventil for styrning av i synnerhet tryckluftdrivna membranpumpar
US5470209A (en) * 1993-10-13 1995-11-28 Shurflo Pump Manufacturing Co. Offset reciprocable device
US7694622B2 (en) * 2006-12-01 2010-04-13 Nordson Corporation Fluid pressure operated piston engine apparatus and method
WO2010099579A1 (fr) * 2009-03-06 2010-09-10 David Goldie Pompe alternative
CN106762568B (zh) * 2017-03-10 2018-10-26 王政玉 一种多腔流体动力隔膜泵系统
CN108061023A (zh) * 2018-01-24 2018-05-22 昆山华亿丰涂装设备科技有限公司 一种复合轴三球隔膜泵

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1453607A1 (de) * 1962-11-05 1972-10-26 Panther Pumps & Equipment Co Membranpumpe
DE4106180A1 (de) 1990-10-08 1992-04-09 Dirk Dipl Ing Budde Doppel-membranpumpe
DE69302656T2 (de) 1992-10-29 1997-02-06 Nordson Corp Anordnung für Druckmittelmotor mit Kolben
DE19738779A1 (de) * 1997-09-04 1999-03-18 Almatec Maschinenbau Gmbh Umsteuerventil für eine Druckluftmembranpumpe

Also Published As

Publication number Publication date
CN114962228A (zh) 2022-08-30
EP4050213B1 (fr) 2023-06-07
ES2951280T3 (es) 2023-10-19
EP4050213C0 (fr) 2023-06-07
PL4050213T3 (pl) 2023-08-21
DE102021104548A1 (de) 2022-08-25
US20220268267A1 (en) 2022-08-25

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