EP0261180B1 - Strömungsregelung für flüssigkeiten zur verhinderung der kontaminierung - Google Patents

Strömungsregelung für flüssigkeiten zur verhinderung der kontaminierung Download PDF

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Publication number
EP0261180B1
EP0261180B1 EP87902035A EP87902035A EP0261180B1 EP 0261180 B1 EP0261180 B1 EP 0261180B1 EP 87902035 A EP87902035 A EP 87902035A EP 87902035 A EP87902035 A EP 87902035A EP 0261180 B1 EP0261180 B1 EP 0261180B1
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EP
European Patent Office
Prior art keywords
pump unit
liquid
piston
primary pump
primary
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
EP87902035A
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English (en)
French (fr)
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EP0261180A1 (de
EP0261180A4 (de
Inventor
Wlodzimierz Rast
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CONFLOW INDUSTRIES PTY. LTD.
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CONFLOW INDUSTRIES PTY Ltd
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Priority to AT87902035T priority Critical patent/ATE67561T1/de
Publication of EP0261180A1 publication Critical patent/EP0261180A1/de
Publication of EP0261180A4 publication Critical patent/EP0261180A4/de
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Publication of EP0261180B1 publication Critical patent/EP0261180B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • 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

Definitions

  • This invention relates to a method of and means for preventing contamination in liquids flowing from a mains to a consumer device.
  • the second pump unit is mechanically driven by the first pump unit and serves as a means of presurising the fluid of the second system.
  • the cited United States Patent refers to transferring hydraulic power from one system to another.
  • the problem is solved by having an air gap in the pressure line between the source of supply and the consumer device, the device of the invention being so arranged that no external pressure is required on the receiver side of the device to which the supply is taken, but the pressure is maintained on the consumer side by means on the supply side which actuate a pump to maintain the pressure at about the same level as the supply line.
  • a primary pump unit at the terminal end of the pressure line which is driven by liquid flow, the liquid being discharged from this primary pump unit by free fall into a funnel or receiving means to be pumped from this to the consumer line by a secondary pump unit in the consumer line.
  • the primary pump unit and the secondary pump unit are coupled to be driven simultaneously and both are arranged to have as near as possible the same volummetric flow.
  • the primary pump unit is of a positive type so that it acts as a valve in the line when the primary pump unit is inoperative and if the secondary pump unit is maintained stationary no flow from the pressure line takes place from the primary pump unit to the reservoir or funnel.
  • the secondary pump unit is free to operate and allows the primary pump unit to be driven by the pressure liquid, to discharge the liquid into the reservoir through the air gap which is simultaneously taken up by the secondary pump unit under drive of the primary pump unit to discharge to the consumer device. If the consumer device flow is cut off the secondary pump unit stops and, as the primary pump unit is coupled to it, it also stops and flow of the liquid from the mains to the pump unit and from the delivery unit to the consumer device stops.
  • the main object of the present invention thus is to achieve a highly effective method of operation of such a device, a further object being a form of construction which is both simple and effective and which if desired can also act as a meter to meter the fluid being used, the later of course being an optional feature.
  • the method according to this invention comprises causing flow of pressure liquid through a primary pump unit adapted to be driven by a pressure fluid having its drive coupled to the drive of a secondary pump unit adapted to pump liquid under pressure to a consumer device, discharging the liquid from the primary pump unit through an air gap, and receiving the liquid discharged from the air gap by the secondary pump unit (6) whereby to continue flow of the pressure liquid beyond the air gap to the consumer device.
  • the apparatus comprises a primary pump unit to receive a pressure fluid and be driven thereby, means to discharge the fluid from the primary pump to a vessel through an air gap, means to couple the drive of the primary pump unit to the drive of a secondary pump unit, the second pump unit drawing liquid from the vessel and pressurizing it into a flow line by reason of the drive of the second pump unit from the drive of the first pump unit.
  • the pump units can take various forms but have similar capacities so that pressure liquid flowing through the gap flows on beyond the gap at the same relative pressure by means of the arrangement.
  • the secondary pump unit and the primary pump unit both stop because they are coupled together drive-wise but immediately the consumer device draws pressure liquid from the secondary pump unit the first pump unit is caused to supply the liquid through the gap in the same proportion as the liquid is used by the consumer device.
  • two pairs of cylinders are formed in a housing, the one pair of cylinders being the primary pump unit, having two cylinders, which may be of unequal diameter, in each of which is a piston coupled by a connecting rod to a piston in the secondary pump unit so that a first piston in the primary pump unit drives a first piston in the secondary pump unit for synchronised operation, while a second piston in the primary pump unit drives a second piston in the secondary pump unit.
  • Each of these pistons of the primary pump unit is coupled by means of a connecting rod to valve means which control the flow of liquid into the second piston of the primary pump unit but the out-flow of the primary pump unit is taken via an air gap to the input of the secondary pump unit so that, as the primary pump unit delivers liquid as it is allowed to be driven as a motor by the pressure liquid from the supply line, it simultaneously activates the pistons of the second pump unit to receive the liquid from the pump unit and pressurizes it and pass it on to the consumer device.
  • both pump units are coupled together, that is the first and second pistons of the primary pump unit are coupled to the respective first and second pistons of the secondary pump unit, displacement occurring of the pistons in the primary pump unit are matched by displacment occurring of the pistons in the secondary pump unit so that while there is an air gap between the two units, the liquid flows from the supply line through the primary pump unit then through an air gap, and is then available to the secondary pump unit which maintains the pressure in the on-flowing liquid because of the drive coupling of the primary and secondary units.
  • pressure liquid is fed to the primary pump unit 1 by a pressure line 2 and drives the primary pump unit, the liquid leaving the primary pump unit 1 through the discharge line 3 under low pressure from whence it flows through the air gap 4 to receiving means 5 such as a vessel when the primary pump unit 1 is driven by the pressure liquid.
  • the secondary pump unit 6 has its drive connected by a drive coupler 7 to the drive of the first pump unit 1 so that the primary and secondary pump units 1 and 6 are driven synchronously.
  • the pressure liquid outlet from the secondary pump unit 6 is taken by the pressure line 8 to the consumer device 9.
  • the secondary pump unit 6 In operation, when the consumer device 9 accepts pressure liquid, the secondary pump unit 6 is free to rotate and this allows the primary pump unit 1 to be driven by the pressure liquid connected to the primary pump unit 1.
  • the pressure in the outlet line 8 for the liquid is similar to the pressure in the inlet line 2.
  • the first and second cylinders 10 and 11 of the pump unit 1 communicate with a valve chest 12 which has a series of ports in it connected to the IN pressure line 2 from the pressure supply and the discharge line 3 from the unit to the air gap 4.
  • valves 13 and 14 shown as slide valves, one actuated by a first piston 15 of the primary pump unit 1 and the other by a second piston 16 of the primary pump unit 1 in such a way that when the first piston 15 of the primary pump unit 1 is displaced by fluid, the valve 13 is moved when the piston reaches near the end of the stroke of that first piston 15 to change the flow through the porting of the valve chest 14, the pressure liquid driving the first piston 15 forward to near the end of the stroke whereupon the slide valve 13 coupled to it moves to change the porting to apply the pressure to the second piston 16 of the primary pump unit 1 to drive that piston 16 to the opposite end of its stroke.
  • valve 14 connected to it in the chest 12 is actuated to again establish the first described state and the first piston 15 is driven in the opposite direction until it reaches near the end of its stroke whereupon the valve 13 coupled to it is again repositioned to actuate the second piston 16 of the primary pump unit 1.
  • the arrangement of the secondary pump unit 6 is similar to that of the primary pump unit 1 and has a liquid inlet 17 and is arranged so that alternately the two pistons 18 and 19 of the secondary pump unit supply the liquid pumping action.
  • the first and second pistons 18 and 19 of the secondary pump unit 6 act in cylinders 29 and 30.
  • the sequence of the pistons 18 and 19 is so arranged that when the first piston 18 is on a delivery stroke the other piston 19 of the unit is stationary but as the first piston 18 reaches the end portion of its delivery stroke the valve 20 in the valve chest 21 is changed to drive the second piston 19 on its stroke, the first piston 18 of the unit having reached the end of its stroke remaining there and cutting off flow until the second piston 19 reaches the end portion of its stroke whereupon the valve 22 in the valve chest 21 is changed and the first piston 18 is actuated on its next delivery stroke.
  • the first piston 15 of the primary pump unit 1 and the first piston 18 of the secondary pump unit 6 are connected to move in unison by a drive coupler 7, this being in the nature of a piston rod 23, the second piston 16 of the primary pump unit 8 and the second piston 19 of the secondary pump unit are similarly connected to move in unison by a piston rod 24.
  • valves 20 and 22 of the valve chest 21 are connected respectively to the piston rods 23 and 24, as are the valves 13 and 14.
  • the stems 25 of each of the valves 13, 14, 20 and 22 are connected to be actuated by stops 27 in the piston rods 23 and 24 but have interposed springs 28.
  • the first cylinder is designated 29 and the second cylinder 30 and house the pistons 18 and 19 respectively.
  • one of the pistons 15 or 16 of the primary pump unit 1 may be the main driving piston of the primary pump unit and can be of a substantial diameter, the second piston being of a smaller diameter as its function is essentially to take over the pumping action as the first piston nears the end of its stroke and continues the pumping action while the first piston rests until the second piston reaches near the end of its stroke and the valve is changed over whereupon the first piston is driven in the opposite direction, this arrangement ensuring a continuous flow of liquid and doing away with problems such as water hammer which is one of the basic problems with the mechanisms of this type.
  • the primary pump unit cylinders 10 and 11 and the secondary pump unit cylinders are coaxial and the cylinders 10 and 11 form a common chamber as do the cylinders 29 and 30.
  • the pistons 15 and 16 of the primary pump unit 1 and the pistons 29 and 30 of the secondary pump unit 6 dividing the cylinders into their two active areas.
  • the piston rod 23 actuates the valves 13 and 20 of the primary and secondary pump units 1 and 6 respectively through a rocker arm 34 which has an intermediate pivot 35 connecting it to a frame not shown, which also carries the cylinders 10, 11, 29 and 30, the rocker arm being actuated by the stops 27 on the piston rod 23.
  • the rocker arm 36 is similarly carried by a pivot 37 to engage the valve stem 25 of the valves 14 and 22 to activate these valves from the piston rod 24.
  • the operation of the primary pump unit 1 is as follows:-
  • the primary pump unit 1 with the valves 13 and 14 in the position shown in FIG 3, causes pressure liquid to flow into the port A and the liquid moves piston 15 down, expelling liquid through the port B and valve 13 into air gap 4 outlet.
  • valve 14 At the end of the stroke of the piston 15, the valve 14 is moved to cover the port C and uncover the port B. Mains pressure is maintained through the port A on the piston 15. Mains liquid then flows through the port B and moves the piston 16 down, expelling liquid through the port C to the valve 13 and then to the air gap 4 outlet. At end of the stroke of the piston 16 the valve 14 is moved to cover the port A, thus allowing pressure liquid to flow through the port B and move the piston 15 upwards, expelling liquid through the port A and valve 14 to the air gap 4 outlet.
  • valve 13 At the end of the stroke of the piston 15, the valve 13 is moved to cover the port B and uncover the port C, allowing pressure liquid to flow through the port C, moving the piston 15 upwards and expelling liquid through the port B to the valve 13 and air gap 4 outlet.
  • the valve 14 At completion of the upstroke of the piston 16, the valve 14 is moved to uncover the port A, completing the cycle of the unit.
  • the operation of the secondary pump unit 6 is as follows:-
  • This unit operates in direct sequence with the primary pump unit 1.
  • the piston 18 is moved down by the piston 15, liquid is expelled through the port F and valve 22 to the consumer outlet 8.
  • liquid is drawn in from the receiving means 5 via the port E and valve 20.
  • the valve 20 is moved upwards.
  • the piston 19 moves down expelling liquid through port E to the outlet 8. Liquid is drawn in through the valve 20 and port D to the topside of the piston 19.
  • the valve 22 is moved upwards.
  • As the piston 18 moves upwards liquid is expelled through the port E and valve 20 to the consumer outlet 8. Liquid is drawn in through valve 22 and port F to the underside of piston 19.
  • the valve 20 is moved down.
  • the piston 19 is moved upwards, expelling liquid through the port D and valve 20 to the consumer outlet 8.
  • the underside of the piston 19 draws liquid in through the valve 20 and port E.
  • the valve 22 is moved downwards. This completes the cycle of the secondary pump unit 6 at the same time as the primary pump unit 1.
  • FIG. 2 a mechanical meter 40 is shown to record volume of water or other liquid used.
  • valve 14 of the primary pump unit 1 is similar to that of the earlier described embodiment but no second valve corresponding to the valve 15 is required.
  • valves 42 on the inlet side of the cylinder 29 of the secondary pump unit 6 are one-way valves, and similarly the valves 43 on the outlet side of the cylinder 29 are one-way valves.
  • An accumulator 44 is used to limit pulsing of the liquid during flow changeover.
  • the replenisher device comprises a valve 45 in a valve chest 46, and this valve is activated through a rod 38 by a float 39 in the receiving means 5.
  • the port G of the valve chest 12 communicates with one end of the cylinder 10, but the port G also is connected through a one-way valve 41 with the port H of the valve chest 46.
  • the port J of the valve chest 12 communicates with the other end of the cylinder 10 but also with the port K of the valve chest 46.
  • the outlet port L of the valve chest 46 communicates with a smaller auxilliary cylinder 47 having a piston 48 in it connected to the rod 23 of the piston 15, this piston being in its cylinder 47 only through part of its stroke, the cylinder 47 opening to the cylinder 10.
  • the port L is connected to the port K by a one-way valve 49.
  • the rod 25 of the valve 14 is actuated by an over balancing arm 50 which is held by a compression spring 51 but over balanced by stops 52 on an actuating arm 53 secured to the rod 23 of the piston 15.
  • the inlet 2 to the valve chest 12 has a stop cock 54 in it connected by a rod 55 to a pivoted latch arm 56 loaded by a spring 57 and normally retained by a pivoted latch 58 which is released from the latch arm 56 when the weight of liquid in the receiving means exceeds a calculated amount.
  • the latch arm is actuated by a cam 59.
  • a spring 60 serves to control the position of the receiving unit 5 about a fulcrum 61.
  • the valve 45 is controlled by the float 39 so that when the liquid level in the receiving means 5 drops, the valve 45 moves to join the ports K and L.
  • the piston 15 moves upwards and the valve 14 is down, liquid is expelled through the port J to the air gap 4 as normal.
  • the auxiliary piston 48 enter its smaller cylinder 47, liquid is expelled through the port L to the valve 45, then through the port K to the valve 14 and the air gap 4 outlet. This liquid from the small cylinder 47 raises the level in the receiving means 5 until the float 39 changes the valve 45 to the by-pass position.
  • the above action can be seen to comprise measuring the relative volumes of liquid in the primary pump unit 1 and the secondary pump unit 6, and regulating the volume in the primary pump unit 1 by a float valve 49 to control the pressure liquid flow to the primary pump unit 1.
  • the mains cut-off system is designed to prevent overflow of the receiving means 5 and thus to prevent flooding and acts as follows:-
  • the receiving means 5 is connected to a support by a pivot which acts as a fulcrum 61 and is pivotted off-centre and balanced by a spring 60 to be level when the liquid is at operation level.
  • a pivot acts as a fulcrum 61 and is pivotted off-centre and balanced by a spring 60 to be level when the liquid is at operation level.
  • the level in the receiving unit 5 rises, and the receiving unit tips on the fulcrum 61 to cause the face of the cam 59 to release a spring loaded latch arm 56 which closes the stop-cock 54, cutting off the liquid supply.
  • the primary pump unit 1 will have the pressure from the supply means on it at all times but can only operate when the pump unit is free to move, because the driven means are coupled on an equal-capacity basis to the driven means of the secondary pump unit 6 so that if there is no outflow from the secondary pump unit 6 to the consumer device 9 that unit is locked and holds the driven means of the primary pump unit similarly locked. While the drive for the whole unit comes from the pressure exerted on the primary pump unit 1, the control of flow is by the consumer device 9 which controls the output of the secondary pump unit 6.
  • valves can be other than slide valves provided they control the liquid flow and in this respect it is also important to appreciate as previously stated that while the one piston is on a power stroke the other piston is at rest until the first piston reaches near the end of its stroke whereupon the other piston takes over the displacement while the first piston stops at the end of its stroke and remains there until the second piston is near the end of its stroke whereupon the valves reverse flow and as the second piston readies the end of its stroke, the other piston is already on its power stroke, thereby giving continuous flow without any interruption.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Devices For Dispensing Beverages (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Feeding And Controlling Fuel (AREA)

Claims (18)

1. Verfahren zur verunreinigungsfreien Durchflußmessung bzw. -steuerung oder -regelung von Flüssigkeiten in einem System mit einer von einer Druckflüssigkeit antreibbaren Primärpumpeneinheit (1), deren Abtrieb (7) mit einer Sekundärpumpeneinheit (6) zu deren Antrieb gekuppelt ist, mittels derer Flüssigkeit unter Druck einer Verbrauchereinrichtung (9) zupumpbar ist, dadurch gekennzeichnet, daß die Flüssigkeit von der Primärpumpeneinheit (1) durch eine Luftlücke bzw. -falle (4) abgegeben und die Flüssigkeit an der Sekundärpumpeneinheit (6) von der Luftlücke bzw. -falle (4) aufgenommen wird, wodurch der Druckflüssigkeitsfluß über die Luftlücke bzw. -falle (4) hinweg zur Verbrauchereinrichtung (9) aufrechterhalten wird.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Luftlücke bzw. -falle (4) zwischen einer Abflußleitung von der Primärpumpeneinheit (1) und einer Auffangeinrichtung (5) angeordnet und die Flüssigkeit aus dieser Auffangeinrichtung (5) in die Sekundärpumpereinheit (6) gezogen wird.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das relative Flüssigkeitsvolumen in der Primärpumpeneinheit (1) und in der Sekundärpumpeneinheit (6) gemessen und das Flüssigkeitsvolumen in der Primärpumpeneinheit (1) durch Steuerung bzw. Regelung des Druckflüssigkeitszuflusses zur Primärpumpeneinheit (1) mittels einer Schwimmereinrichtung an der Auffangeinrichtung (5) reguliert wird.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß eine Primärpumpeneinheit (1), die zumindest einen Kolben (15) in einem Hauptzylinder (10) und eine Ventileinrichtung (13, 14) aufweist, und eine Sekundärpumpeneinheit (6), die gleichfalls zumindest einen Kolben (18) und eine Ventileinrichtung (20, 22) aufweist, verwandt werden, und daß der Ventileinrichtung (13, 14) der Primärpumpeneinheit (1) Druckflüssigkeit von einer Druckleitung (2) zugeführt und der Flüssigkeit die Möglichkeit gegeben wird, von der Primärpumpeneinheit (1) in eine Luftlücke bzw. -falle (4) abzufließen, daß die Flüssigkeit von der Luftlücke bzw. -falle (4) aufgenommen und in der Sekundärpumpeneinheit (6) auf Druck gebracht wird, um an der Verbrauchereinrichtung (9) Druckflüssigkeit anzuliefern, wobei der Flüssigkeitsfluß durch die Primärpumpeneinheit (1) mit dem Flüssigkeitsfluß durch die Sekundärpumpeneinheit (6) durch die Antriebskupplung zwischen der Primärpumpeneinheit (1) und der Sekundärpumpeneinheit (6) synchronisiert wird.
5. Verfahren nach Anspruch 3, bei dem die Primärpumpeneinheit (1) zwei als Paar angeordnete Pumpeneinheiten (10, 11) und die Sekundärpumpeneinheit (6) gleichfalls zwei als Paar angeordnete Pumpeneinheiten (29, 30) aufweist, dadurch gekennzeichnet, daß die Pumpeinrichtungen (10, 11, 29, 30) abwechselnd, aber synchron betätigt werden.
6. Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß eine Flüssigkeitsauffülleinrichtung betätigt wird, indem mit einem Hauptzylinder (10) der Primärpumpeneinheit (1) ein Hilfszylinder (47) geringerer Kapazität, der in sich einen mit dem Kolben (15) des Hauptzylinders verbundenen Kolben (48) aufweist, in Zuflußverbindung gebracht wird, Flüssigkeit zum Zu- und Abfließen zu bzw. von diesen Zylindern (10, 47) gebracht wird, wenn die Kolben (15 und 48) in ihnen durch Druckflüssigkeit angetrieben werden, und daß Flüssigkeit von der Druckflüssigkeitsquelle den Zylindern (10, 47) zugeführt wird, wenn ein Schwimmerventil (47) durch einen Abfall des Flüssigkeitspegels in der Auffangeinrichtung (5) betätigt wird, um dadurch ein Gleichgewicht zwischen dem Flüssigkeitsvolumen in der Primärpumpeneinheit (1) und in der Sekundärpumpeneinheit (6) herzustellen.
7. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Flüssigkeit in der Auffangeinrichtung (5) gemessen und der Flüssigkeitsfluß zur Primärpumpeneinheit (1) zum Erliegen gebracht wird, wenn die Flüssigkeitsmenge in der Auffangeinrichtung ein bestimmtes Volumen erreicht.
8. Vorrichtung zur verunreinigungsfreien Durchflußmessung bzw. -steuerung oder -regelung von Flüssigkeiten, bei welcher der Abtrieb einer von Druckflüssigkeit antreibbaren Primärpumpeneinheit (1) mit einer Sekundärpumpeneinheit (6) zu deren Antrieb gekuppelt ist, mittels derer die Druckflüssigkeit einer Verbrauchereinrichtung (9) zuführbar ist, gekennzeichnet durch ein zwischen einem Flüssigkeitsauslaß (3) der Primärpumpeneinheit (1) und einem Flüssigkeitseinlaß (17) der Sekundärpumpeneinheit (6) angeordnete Luftlücke bzw. -falle (4).
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Primärpumpeneinheit (1) und die Sekundärpumpeneinheit (6) jeweils Verdrängermittel aufweisen, die so gekuppelt sind, daß bewirkt wird, daß die Verdrängermittel der Primärpumpeneinheit (1) die Verdrängermittel der Sekundärpumpeneinheit (6) synchron antreiben.
10. Vorrichtung nach Anspruch 8, gekennzeichnet durch mindestens einen ersten Hauptkolben (15) in einem Zylinder (10), der durch eine Ventileinrichtung (12, 14) durch Druckflüssigkeit von einer Druckleitung (2) antreibbar ist, um so die Primärpumpeneinheit (1) für die Flüssigkeitslieferung durch eine Abflußleitung (3) zu bilden, mindestens einen ersten Hauptkolben (18) in einem Zylinder (29), der durch eine Ventileinrichtung (20, 22) als Flüssigkeitspumpe zur Wirkung bringbar ist, um so die Sekundärpumpeneinheit (6) für die Flüssigkeitslieferung zur Verbrauchereinrichtung (9) zu bilden, und Antriebskupplungsmittel (23) zwischen dem Kolben (15) der Primärpumpeneinheit (1) und dem Kolben (18), mittels derer eine synchrone Betätigung der Kolben (15 und 18) bewirkbar ist, wobei die Luftlücke bzw. -falle (4) zwischen der Ablußleitung (3) der Primärpumpeneinheit (1) und der sich in die Ventileinrichtung (20, 22) der Sekundärpumpeneinheit (6) entleerenden Auffangeinrichtung (5) angeordnet ist.
11. Vorrichtung nach Anspruch 8, gekennzeichnet durch paarbildend jeweils einen ersten Hauptkolben (15) und einen zweiten Kolben (16) im ersten und im zweiten Zylinder (10, 11) in der Primärpumpeneinheit (1) und gleichfalls paarbildend jeweils einen ersten Hauptkolben (18) und einem zweiten Kolben (19) im ersten und im zweiten Zylinder (29, 30) in der Sekundärpumpeneinheit (6), eine erste dem ersten Hauptkolben (15) der Primärpumpeneinheit (1) mit dem ersten Hauptkolben (18) der Sekundärpumpeneinheit (6) kuppelnde Kolbenstange (23), eine zweite dem zweiten Kolben (16) der Primärpumpeneinheit (1) mit dem zweiten Kolben (19) der Sekundärpumpeneinheit (6) kuppelnde Kolbenstange (23), die erste Kolbenstange (23) mit den Ventilen (13, 20) kuppelnde Mittel (34) und die zweite Kolbenstange (24) mit den Ventilen (14, 22) kuppelnde Mittel (36), wobei diese Kupplungen so angeordnet sind, daß sie bewirken, daß die Kolben abwechselnd angetrieben werden.
12. Vorrichtung nach Anspruch 11, gekennzeichnet durch Mitnehmer (27) an der ersten Kolbenstange (23) und der zweiten Kolbenstange (24), die so angeordnet sind, daß sie mit den Mitteln (34, 36), welche die Ventile (13, 20 und 14, 22) betätigen, nahe dem Ende des Hubes der Kolben (15, 16 und 18, 19) in Wirkverbindung kommen, wodurch dann, wenn ein Kolben sich dem Ende seines Hubes nähert, die Ventile (13, 20 oder 14, 22) so betätigt werden. daß sie bewirken, daß der andere Kolben des betreffenden Paares betätigt wird.
13. Vorrichtung nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß, die ersten Zylinder (10, 29) der Primär- und der Sekundärpumpeneinheit (1, 6) zueinander koaxial und die zweiten Zylinder (11, 30) der Primär- und der Sekundärpumpeneinheit (1, 6) zueinander koaxial angeordnet sind.
14. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß alle Zylinder (10, 11, 29, 30) zueinander koaxial und die Zylinder (10, 11) der Primärpumpeneinheit (1) richtungsgleich und die Zylinder (29, 30) der Sekundärpumpeneinheit (6) richtungsgleich laufend angeordnet sind, wobei die Kolben (15, 16) der Primärpumpeneinheit (1) in einer gemeinsamen Kammer und die Kolben (18, 19) der Sekundärpumpeneinheit (6) gleichfalls in einer gemeinsamen Kammer angeordnet sind.
15. Vorrichtung nach Anspruch 8, gekennzeichnet durch einen Hauptzylinder (10) mit einem Kolben (15) in sich, der mit einer Ventileinrichtung (14) die Primärpumpeneinheit (1) bildet, einen Hauptzylinder (29) mit einem Kolben (18) in sich, der mit einer Ventileinrichtung (42, 43) die Sekundärpumpeneinheit (6) bildet, wobei die Zylinder in Abstand, aber koaxial zueinander angeordnet sind, eine den Kolben (15) der Primärpumpeneinheit (1) mit dem Kolben (18) der Sekundärpumpeneinheit (6) verbindende Kolbenstange, eine Ventileinrichtung (14), die so ausgebildet und angeordnet ist, daß durch sie abwechselnd das eine Ende des Zylinders (10) der ersten bzw. Primärpumpeneinheit (1) mit dem Druckflüssigkeitszufluß verbunden und das andere Ende desselben an den Flüssigkeitsabfluß zur Luftlücke bzw. -falle (4) und umgekehrt angeschlossen wird, eine Ventileinrichtung (42, 43), die so ausgebildet und angeordnet ist, daß durch sie abwechselnd das eine Ende des Zylinders (29) mit der Flüssigkeitszuführung von der Luftlücke bzw. -falle (4) verbunden und sein anderes Ende an den Druckflüssigkeitsabfluß zur Leitung zur Verbrauchereinrichtung und umgekehrt angeschlossen wird, und ferner dadurch, daß die Ventileinrichtung (14) der Primärpumpeneinheit (1) durch Mitnehmer (52) an einem Betätigungsarm (53) an der Kolbenstange (23) betätigbar ist, und daß die Ventile (42, 43) druckbetätigte Einwegventile sind.
16. Vorrichtung nach Anspruch 15, dadurch gekennzeichnet, daß die Mitnehmer (52) an der Kolbenstange (23) über einen Waagebalken (50) einen Ventilstössel (25) betätigen.
17. Vorrichtung nach Anspruch 8, gekennzeichnet durch eine Auffülleinrichtung zur Aufrechterhaltung des Gleichgewichtes der Flüssigkeit in der Primärpumpeneinheit (1) mit der Flüssigkeit in der Sekundärpumpeneinheit (6), welche einen Hilfszylinder (47) mit geringerem Volumen als dem des Hauptzylinders (10) der Primärpumpeneinheit (1), der mit diesem kommuniziert, einen mit der Kolbenstange (23) des Kolbens (15) im Hauptzylinder (10) gekuppelten Kolben (48) im Hilfszylinder, ein Ventil (45) in einem Ventilblock (46), das so angeschlossen ist, daß es in einer Stellung Druckflüssigkeitsfluß zur Luftlücke bzw. -falle (4) zwischen dem geschlossenen Ende des kleineren Zylinders (47) und dem Kolben (48) in diesem gestattet, während der Fluß vom gegenüberliegenden Ende des Hauptzylinders (10) unterbrochen wird, um dadurch der Primärpumpeneinheit (1) Flüssigkeit zuzuführen, und eine Einrichtung aufweist, welche das Ventil (45) im Ventilblock (46) mit einem Schwimmer (39) in einem die Auffangeinrichtung (5) bildenden Behälter verbindet, wodurch Flüssigkeit der Sekundärpumpeneinheit (6) zugeführt wird, wenn der Pegel in der Auffangeinrichtung unter ein vorbestimmtes Volumen fällt.
18. Vorrichtung nach Anspruch 10, gekennzeichnet durch einen Sperrhahn (54) in der Druckleitung (2) zum Ventilblock (12), eine Einrichtung zur Messung des Flüssigkeitsvolumens in der Auffangeinrichtung (5) und Kupplungsmittel (55) zum Schließen des Sperrhahns (54), wenn das Flüssigkeitsvolumen einen vorbestimmten Wert übersteigt.
EP87902035A 1986-03-20 1987-03-20 Strömungsregelung für flüssigkeiten zur verhinderung der kontaminierung Expired - Lifetime EP0261180B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87902035T ATE67561T1 (de) 1986-03-20 1987-03-20 Stroemungsregelung fuer fluessigkeiten zur verhinderung der kontaminierung.

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AUPH561986 1986-03-20
AU5171/86 1986-03-24
AUPH517186 1986-03-24
AU5619/86 1986-04-24

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EP0261180A1 EP0261180A1 (de) 1988-03-30
EP0261180A4 EP0261180A4 (de) 1990-01-08
EP0261180B1 true EP0261180B1 (de) 1991-09-18

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EP (1) EP0261180B1 (de)
JP (1) JPS63503237A (de)
AT (1) ATE67561T1 (de)
AU (1) AU596169B2 (de)
DE (1) DE3773098D1 (de)
WO (1) WO1987005973A1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0860558A1 (de) * 1997-02-19 1998-08-26 A.T. Avanzata Tecnologia S.R.L. Fluidzufuhrsystem von einem Netzwerk zu einem Benutzer mit Fluidabtrennung und Druckbeauftragung des Benutzerfluides durch Verwendung des Netzwerkdruckes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB551683A (en) * 1939-01-05 1943-03-05 Bristol Aeroplane Co Ltd Improvements in apparatus for increasing or reducing fluid pressure
US3128782A (en) * 1961-02-13 1964-04-14 Alexander S Limpert Small volume feeder pump and process of proportional feeding
US3295454A (en) * 1965-01-27 1967-01-03 William B Plum Pressure reducing pumping system
US4637783A (en) * 1980-10-20 1987-01-20 Sri International Fluid motor-pumping apparatus and method for energy recovery
US4658760A (en) * 1985-06-17 1987-04-21 American Thermal Corporation Pressure transfer fluid heater

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EP0261180A1 (de) 1988-03-30
WO1987005973A1 (en) 1987-10-08
AU596169B2 (en) 1990-04-26
EP0261180A4 (de) 1990-01-08
DE3773098D1 (de) 1991-10-24
ATE67561T1 (de) 1991-10-15
JPS63503237A (ja) 1988-11-24
AU7203787A (en) 1987-10-20

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