EP1136702B1 - Pressurised water supply - Google Patents

Pressurised water supply Download PDF

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Publication number
EP1136702B1
EP1136702B1 EP01105014A EP01105014A EP1136702B1 EP 1136702 B1 EP1136702 B1 EP 1136702B1 EP 01105014 A EP01105014 A EP 01105014A EP 01105014 A EP01105014 A EP 01105014A EP 1136702 B1 EP1136702 B1 EP 1136702B1
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EP
European Patent Office
Prior art keywords
consumers
pressure
valve
hydraulic
pump
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
EP01105014A
Other languages
German (de)
French (fr)
Other versions
EP1136702A2 (en
EP1136702A3 (en
Inventor
Michael Ruoff
Frank-Martin Schunack
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.)
URACA PUMPENFABRIK GmbH and Co KG
Original Assignee
URACA PUMPENFABRIK GmbH and Co KG
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Publication of EP1136702A2 publication Critical patent/EP1136702A2/en
Publication of EP1136702A3 publication Critical patent/EP1136702A3/en
Application granted granted Critical
Publication of EP1136702B1 publication Critical patent/EP1136702B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • F04B49/035—Bypassing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/41—Flow control characterised by the positions of the valve element
    • F15B2211/411—Flow control characterised by the positions of the valve element the positions being discrete
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/47—Flow control in one direction only
    • F15B2211/473—Flow control in one direction only without restriction in the reverse direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/51—Pressure control characterised by the positions of the valve element
    • F15B2211/513—Pressure control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/526—Pressure control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure

Definitions

  • the invention relates to a pressurized water supply - the term pressurized water also other hydraulic pressure medium includes - with several separately connectable and disconnectable parallel Pressurized water consumers, one of the pressurized water consumers parallel overflow arrangement for discharging excess Pressurized water and a pump unit with controllable Delivery.
  • An already proven pressurized water supply of the specified Art has a pump unit whose capacity constantly the maximum demand of the connected pressurized water consumers exceeds, i. it is constantly pressurized water promoted in excess, and depending on the number of simultaneously working pressure water consumers changing Excess is dissipated via the overflow arrangement. These is controlled depending on the pressure of the pressurized water or regulated, such that the pressure of the pressurized water also when connecting or disconnecting one or more of the connected pressurized water consumers only comparatively may vary slightly.
  • DE-OS 24 13 295 now shows a respect to the flow and the pressure on the pump pressure side controllable Pump, although excluded at any point is that in all operating conditions of the connected to the pump Pressure system Pressure medium via a pressure relief valve is discharged, which accordingly at high Press and / or for media that is cavitation tend to be subject to high wear, which then only be compensated by increased pump capacity could.
  • the document GB 1 466 834 A shows a pressurized water supply according to the preamble of claim 1.
  • the object of the invention is now, the cost-effectiveness of a Pressurized water supply of the type specified above on the one hand long operating times without inspections and on the other hand, a little effort for control or regulation should be allowed.
  • the Pump unit with connection of all consumers as well as shut off Overflow arrangement on demand-based delivery adjustable or einregelbar is that when switching off one or more of the connected pressurized water consumers the aforementioned capacity at least substantially remains unchanged and the overflow arrangement a predetermined by the switched off pressurized water consumers Pressure water dissipates, and that the overflow arrangement a Shut-off valve and a controllable arranged in series Overflow valve, whose maximum throttle resistance is greater than the throttle resistance of the pressurized water consumer with maximum throttle resistance.
  • the invention is based on the general idea, on the one hand To control or regulate the pump set and thus the delivery rate of the pump set to the maximum requirement to adjust the connected pressurized water consumer and on the other hand, at shutdown of one or more of Pressurized water consumer when the connection of all pressure water consumers blocked overflow arrangement more or less open to the shutdown of pressurized water consumers to dissipate unrecorded pressurized water.
  • shut-off valve Between the closed and open position of the shut-off valve can be switched extremely fast. Furthermore the overflow valve adjusts quickly as needed, because it can always be open.
  • the overflow arrangement in closed shut-off valve i. when switching on all pressurized water consumers connected to the pressurized water supply, no wear. this applies even if the number of actually connected Consumer is less than the maximum number of connectable Consumers, i. if not all consumer connections the pressurized water supply are actually occupied.
  • shut-off valves arranged at the pressurized water supply. It is preferable provided, these shut-off valves near the pump unit to be arranged or integrated into the pump set and to connect the pressurized water consumers with the pressurized water supply provided connection lines locked shut-off valve pressure-free.
  • the single figure shows a schematic diagram a pressurized water supply according to the invention.
  • a pump 2 acting as a pressure source is intended for pressurized water and water from a suction side connected to the pump 2 reservoir 3 in a on the pressure side connected to the pump 2 distribution line 4 promotes pressurized water.
  • a pressure relief valve 5 connected to the distribution line 4 is dangerous to avoid Overpressures a pressure relief valve 5 connected.
  • a normally open, seat-controlled shut-off valve 6 with a series-connected, preferably gap-controlled overflow valve 7 whose function is explained below.
  • the distribution line 4 has several branches, each by a normally closed, seat-controlled Shut-off valve 8,9 and 10 and one in series switched, preferably gap-controlled pressure-holding valve 11,12 and 13, whose purpose will be explained below, controlled become.
  • valves can be a compact valve block 14 summarized.
  • the pressure limiting valve 5 and the overflow valve 7 can be connected on the output side with the reservoir 3. however It is also possible, the off or overflowing water to prevent the heating of the reservoir 3 to the outside conduct.
  • shut-off valves 8 to 10 in the example shown downstream pressure holding valves 11 to 13 can the output side via pressure hoses with pressurized water consumers, be connected in the example shown with spray lances 15, as usual for the removal of ailing material on buildings are.
  • a central control unit 17 controls the one hand, the engine 1 and on the other hand, the valves 6 to 13. In addition, the Control unit 17 with the actuators of the spray lances 15,16 or the like. connected, wherein the control unit 17 on the one hand the total number of connected spray lances 15,16 or pressure water consumer recognizes and on the other hand, the state the operating organs of the spray lances 15,16 or Pressure water consumer detected.
  • the state of a stationary parallel operation all connected spray lances 15,16 or pressurized water consumers considered. During such an operating condition are the connected to the spray lances 15,16 or pressure water consumers leading shut-off valves 8 and 9 and the associated pressure holding valves 11 and 12 are opened, while the shut-off valves 6 and 10 from the control unit 17 be kept closed.
  • the engine 1 is from the control unit 17 to such a working speed or speed regulated that in the pressurized water distribution line 4 a detectable by means of a pressure sensor 18 Pressure corresponding to one for the respective pressure medium consumers set preset target pressure.
  • This engine setting is stored by the control unit 17.
  • shut-off valve 6 open and the downstream relief valve 7, which is designed as a controllable throttle valve is, so controlled that the predetermined pressure in the pressurized water distribution line 4 is maintained, and indeed with unchanged power of the motor 1, i. the attitude the engine control and thus the flow rate of Pump 2 remain opposite to the state described above - All connected spray lances 15,16 work parallel - unchanged.
  • the spill valve 7 in the result set to a throttle resistance the throttle resistance the shut off spray lance during spraying operation equivalent. If several of the connected spray lances 15,16 are turned off, the throttle resistance the overflow valve 7 is set to a reduced value, which the throttle resistance of the disconnected Spraying lances in parallel operation corresponds.
  • the control unit 17 receives a corresponding Switching signal and opens the spray lance 15th associated shut-off valve 8.
  • the shut-off valve 8 is opened has been, is the downstream pressure relief valve 11, which like the other pressure holding valves 12 and 13 a controllable throttle valve, but this is its complete open position only at approximate equal pressure on the input and output side of the pressure holding valve can reach, from his severely throttled state increasingly reversed to the open state. This reversal takes place such that the desired pressure in the Pressurized water supply line 4 is maintained, regardless of whether the possibly long pressure hose the spray lance 15 before opening the shut-off valve 8 pressure-free was or not.
  • any Spray lances 15,16 are switched off and switched back on, wherein the power of the motor 1 and the pump 2 readjusted can be as soon as all connected again Spraying lances 15,16 work.
  • the readjusted state remains stored.
  • valves 5,7,11,12 and 13 are on automatically be adapted to the possibly reduced operating pressure, so that the above-described operation also at a reduced operating pressure, i. especially at Connection of consumers 15,16 for a reduced operating pressure, can be carried out.
  • control unit 17 may be formed or be programmed that when operating recording different Learning or testing phases must be carried out:
  • control unit 17 the involvement of a learning phase force in which all connected consumers or Spraying lances 15,16 are put into operation simultaneously have to.
  • shut-off valve 6 also on the output side the overflow valve 7 may be arranged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Domestic Plumbing Installations (AREA)
  • Toys (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Nozzles (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Sanitary Device For Flush Toilet (AREA)

Abstract

The pump (2) is controlled by a variable speed motor (1) according to a central control unit (17) which also controls a pressure limiting valve (5), overflow throttle valve (7) and a shut off valve (6). Spray gun outlets (15,16) have shut off valves (8-10) and pressure control valves (11-13) also controlled by the unit when any are switched on or off and the pressure is held at the supply line (4).

Description

Die Erfindung betrifft eine Druckwasserversorgung - wobei der Begriff Druckwasser auch andere hydraulische Druckmittel umfaßt - mit mehreren separat zu- und abschaltbaren parallelen Druckwasserverbrauchern, einer zu den Druckwasserverbrauchern parallelen Überströmanordnung zur Ableitung überschüssigen Druckwassers sowie einem Pumpenaggregat mit steuerbarer Fördermenge.The invention relates to a pressurized water supply - the term pressurized water also other hydraulic pressure medium includes - with several separately connectable and disconnectable parallel Pressurized water consumers, one of the pressurized water consumers parallel overflow arrangement for discharging excess Pressurized water and a pump unit with controllable Delivery.

Bei der Sanierung von Bauwerken ist es bekannt, Bauwerksoberflächen mit Hochdruckwasser abzuspritzen, um Verschmutzungen und marode oder brüchige Außenschichten abzutragen. Hierzu dienen Spritzpistolen und Spritzlanzen und dgl., wobei bei umfangreicheren Spritzarbeiten mehreren Spritzgeräten eine gemeinsame Druckwasserversorgung zugeordnet sein kann.In the renovation of buildings, it is known, building surfaces with high-pressure water to splash off soiling and to remove ailing or brittle outer layers. Serve for this purpose spray guns and spray lances and Like., Wherein more extensive spraying several Sprayers associated with a common pressurized water supply can be.

Bei Anschluß mehrerer Spritzgeräte an eine gemeinsame Druckwasserversorgung muß gewährleistet sein, daß jedes Spritzgerät auch dann mit Druckwasser unter weitestgehend gleichbleibendem Druck versorgt wird, wenn eines oder mehrere der an die Druckwasserversorgung angeschlossenen Spritzgeräte abgeschaltet bzw. zugeschaltet werden. Der gleichbleibende Druck des einem Spritzgerät zugeführten Druckwassers ist nicht nur unter dem Gesichtspunkt des Arbeitsergebnisses der jeweiligen Spritzarbeit von Bedeutung. Vielmehr soll durch den gleichbleibenden Druck des Druckwassers gewährleistet werden, daß das jeweilige Spritzgerät bei der Spritzarbeit gleichbleibende Rückstoßkräfte aufweist und die mit der Spritzarbeit betreuten Arbeiter nicht durch kurzfristig wechselnde Rückstoßkräfte überrascht werden können.When connecting several sprayers to a common pressurized water supply It must be ensured that each sprayer even then with pressurized water under largely constant Pressure is supplied when one or more of sprayers connected to the pressurized water supply switched off or switched on. The consistent one Pressure of the spray water supplied to a sprayer is not only from the point of view of the result of the work respective injection work of importance. Rather, it should be through ensures the constant pressure of the pressurized water be that the respective sprayer during the spray work has consistent recoil forces and with the Spraying did not care for workers in the short term changing recoil forces can be surprised.

Eine bereits erprobte Druckwasserversorgung der eingangs angegebenen Art besitzt ein Pumpenaggregat, dessen Förderleistung ständig den Maximalbedarf der angeschlossenen Druckwasserverbraucher übersteigt, d.h. es wird ständig Druckwasser im Überschuß gefördert, und der je nach Anzahl der gleichzeitig arbeitenden Druckwasserverbraucher wechselnde Überschuß wird über die Überströmanordnung abgeführt. Diese wird dabei in Abhängigkeit vom Druck des Druckwassers gesteuert bzw. geregelt, derart, daß der Druck des Druckwassers auch bei Zu- oder Abschaltung eines oder mehrerer der angeschlossenen Druckwasserverbraucher nur vergleichsweise geringfügig schwanken kann.An already proven pressurized water supply of the specified Art has a pump unit whose capacity constantly the maximum demand of the connected pressurized water consumers exceeds, i. it is constantly pressurized water promoted in excess, and depending on the number of simultaneously working pressure water consumers changing Excess is dissipated via the overflow arrangement. These is controlled depending on the pressure of the pressurized water or regulated, such that the pressure of the pressurized water also when connecting or disconnecting one or more of the connected pressurized water consumers only comparatively may vary slightly.

Eine derartige Druckwasserversorgung zeichnet sich zwar durch einfache Konstruktion und Steuerung bzw. Regelung aus. Jedoch arbeitet das System mit unerwünscht hohen Leistungsverlusten, wobei erschwerend hinzukommt, daß die Druckwasserversorgung im Vergleich zum Maximalbedarf der angeschlossenen Druckwasserverbraucher überdimensioniert sein muß. Dementsprechend sind sowohl die Betriebskosten als auch die Herstellungskosten hoch.Although such a pressurized water supply is characterized by simple design and control. However, the system works with undesirably high power losses, wherein aggravating added that the pressurized water supply compared to the maximum requirement of the connected Pressure water consumers must be oversized. Accordingly, both the operating costs and the Production costs high.

Die DE-OS 24 13 295 zeigt nun eine bezüglich des Förderstromes sowie des Druckes auf der Pumpendruckseite regelbare Pumpe, wobei allerdings an keiner Stelle ausgeschlossen wird, daß in allen Betriebszuständen des an die Pumpe angeschlossenen Drucksystems Druckmedium über ein Druckentlastungsventil abgeführt wird, welches dementsprechend bei hohen Drücken und/oder bei Druckmedien, die zur Kavitation neigen, einem hohen Verschleiß unterliegt, der dann nur durch erhöhte Förderleistung der Pumpe kompensiert werden könnte.DE-OS 24 13 295 now shows a respect to the flow and the pressure on the pump pressure side controllable Pump, although excluded at any point is that in all operating conditions of the connected to the pump Pressure system Pressure medium via a pressure relief valve is discharged, which accordingly at high Press and / or for media that is cavitation tend to be subject to high wear, which then only be compensated by increased pump capacity could.

Aus der DE 295 16 166 U1 ist die Möglichkeit bekannt, einer steuerbaren Pumpe ein Bypassventil zuzuordnen, so daß der Strom des Pumpmediums zu einem Verbraucher auf der Druckseite der Pumpe alternativ durch Abschaltung der Pumpe oder durch Betätigung des Bypassventiles abgeschaltet werden kann. Allerdings ist nicht vorgesehen, bei geöffnetem Bypassventil ein gewünschtes Druckniveau auf der Druckseite der Pumpe einzustellen. Denn es wird ausdrücklich herausgestellt, daß bei geöffnetem Bypassventil nur eine geringe Leistung für die Pumpe notwendig sei. Dies ist gleichbedeutend damit, daß das Bypassventil nicht einen dem abgeschalteten Verbraucher entsprechenden Drosselwiderstand haben soll.From DE 295 16 166 U1 the possibility is known, a controllable pump to assign a bypass valve, so that the Stream of pumping medium to a consumer on the pressure side the pump alternatively by switching off the pump or be switched off by pressing the bypass valve can. However, it is not intended, with open bypass valve a desired pressure level on the pressure side to adjust the pump. Because it is explicitly stated that with open bypass valve only a small Power is necessary for the pump. This is synonymous so that the bypass valve does not turn one off Consumers have corresponding throttle resistance should.

Die Druckschrift "DANFOSS JOURNALEN" Nr. 4, 1975, Seiten 4 und 5 betrifft parallel geschaltete steuerbare Pumpen im Wasserwerk. Abgesehen davon, daß hier nur vergleichsweise geringe Systemdrücke aufrechterhalten werden müssen, können relativ große Druckschwankungen toleriert werden, die im übrigen durch große Reservoirs gemindert werden. Deshalb kann hier allein mit Steuerung sowie Zu- und Abschalten von Pumpen gearbeitet werden.The document "DANFOSS JOURNALEN" No. 4, 1975, pages 4 and FIG. 5 relates to controllable pumps connected in parallel in FIG Waterworks. Apart from the fact that only comparatively low system pressures can be maintained relatively large pressure fluctuations are tolerated, the rest be reduced by large reservoirs. That's why here alone with control and switching on and off of pumps to be worked.

Die Druckschrift GB 1 466 834 A zeigt eine Druckwasserversorgung gemäß dem Oberbegriff von Anspruch 1.The document GB 1 466 834 A shows a pressurized water supply according to the preamble of claim 1.

Aufgabe der Erfindung ist es nun, die Wirtschaftlichkeit einer Druckwasserversorgung der eingangs angegebenen Art zu erhöhen, wobei einerseits lange Betriebszeiten ohne Inspektionen und andererseits ein geringer Aufwand für Steuerung bzw. Regelung ermöglicht werden sollen.The object of the invention is now, the cost-effectiveness of a Pressurized water supply of the type specified above on the one hand long operating times without inspections and on the other hand, a little effort for control or regulation should be allowed.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Pumpenaggregat bei Zuschaltung aller Verbraucher sowie abgesperrter Überströmanordnung auf bedarfsgerechte Förderleistung einstellbar bzw. einregelbar ist, daß bei Abschaltung eines oder mehrerer der angeschlossenen Druckwasserverbraucher die vorgenannte Förderleistung zumindest im wesentlichen unverändert bleibt und die Überströmanordnung eine durch die abgeschalteten Druckwasserverbraucher vorgegebene Druckwassermenge abführt, und daß die Überströmanordnung ein Absperrventil sowie ein dazu in Reihe angeordnetes steuerbares Überströmventil aufweist, dessen maximaler Drosselwiderstand größer ist als der Drosselwiderstand des Druckwasserverbrauchers mit maximalem Drosselwiderstand.This object is achieved in that the Pump unit with connection of all consumers as well as shut off Overflow arrangement on demand-based delivery adjustable or einregelbar is that when switching off one or more of the connected pressurized water consumers the aforementioned capacity at least substantially remains unchanged and the overflow arrangement a predetermined by the switched off pressurized water consumers Pressure water dissipates, and that the overflow arrangement a Shut-off valve and a controllable arranged in series Overflow valve, whose maximum throttle resistance is greater than the throttle resistance of the pressurized water consumer with maximum throttle resistance.

Die Erfindung beruht auf dem allgemeinen Gedanken, einerseits das Pumpenaggregat zu steuern bzw. zu regeln und damit die Förderleistung des Pumpenaggregates auf den Maximalbedarf der angeschlossenen Druckwasserverbraucher einzustellen und andererseits bei Abschaltung eines oder mehrerer der Druckwasserverbraucher die bei Zuschaltung sämtlicher Druckwasserverbraucher abgesperrte Überströmanordnung mehr oder weniger weit zu öffnen, um das von den abgeschalteten Druckwasserverbrauchern nicht aufgenommene Druckwasser abzuleiten.The invention is based on the general idea, on the one hand To control or regulate the pump set and thus the delivery rate of the pump set to the maximum requirement to adjust the connected pressurized water consumer and on the other hand, at shutdown of one or more of Pressurized water consumer when the connection of all pressure water consumers blocked overflow arrangement more or less open to the shutdown of pressurized water consumers to dissipate unrecorded pressurized water.

Bei der Erfindung ist eine sichere Steuerung bzw. Regelung gewährleistet, weil in allen Betriebszuständen des Systems jeweils nur ein Aggregat, entweder das Pumpenaggregat oder die Überströmanordnung, gesteuert bzw. geregelt werden.In the invention is a safe control or regulation guaranteed, because in all operating conditions of the system in each case only one unit, either the pump unit or the overflow arrangement, be controlled or regulated.

Dabei wird gleichzeitig der Tatsache Rechnung getragen, daß die Steuerung bzw. Regelung der Fördermenge des Pumpenaggregates bei begrenztem konstruktiven Aufwand nur vergleichsweise träge arbeitet. Dies ist ohne weiteres hinnehmbar, weil der maximale Druckwasserbedarf, auf den das Pumpenaggregat erfindungsgemäß eingestellt bzw. eingeregelt wird, sich nur äußerst langsam, entsprechend der durch Verschleiß bedingten Veränderung der Drosselwiderstände der Druckwasserverbraucher, ändern kann.At the same time the fact is taken into account that the control or regulation of the flow rate of the pump unit with limited design effort only comparatively lazy works. This is easily acceptable, because the maximum pressurized water demand on which the pump unit is set or adjusted according to the invention, Only extremely slowly, according to the wear conditional change of the throttling resistances of the pressurized water consumers, can change.

Die bei Zu- und Abschaltung von Druckwasserverbrauchern auftretenden schnellen Änderungen des Druckwasserbedarfes werden dagegen durch die Überströmanordnung eingeregelt, die bei geringem Energiebedarf schnell zu arbeiten vermag.The occurring during connection and disconnection of pressurized water consumers rapid changes in the pressure water requirement contrast, regulated by the overflow arrangement, the can work quickly with low energy requirements.

Zwischen der Schließ- und Offenlage des Absperrventiles kann außerordentlich schnell umgeschaltet werden. Darüber hinaus stellt sich das Überströmventil schnell bedarfsgerecht ein, da es ständig offenbleiben kann. Between the closed and open position of the shut-off valve can be switched extremely fast. Furthermore the overflow valve adjusts quickly as needed, because it can always be open.

Des weiteren ist vorteilhaft, daß die Überströmanordnung bei geschlossenem Absperrventil, d.h. bei Einschaltung sämtlicher an die Druckwasserversorgung angeschlossenen Druckwasserverbraucher, keinerlei Verschleiß erleidet. Dies gilt auch dann, wenn die Zahl der tatsächlich angeschlossenen Verbraucher geringer ist als die Maximalzahl der anschließbaren Verbraucher, d.h. wenn nicht alle Verbraucheranschlüsse der Druckwasserversorgung tatsächlich belegt sind.Furthermore, it is advantageous that the overflow arrangement in closed shut-off valve, i. when switching on all pressurized water consumers connected to the pressurized water supply, no wear. this applies even if the number of actually connected Consumer is less than the maximum number of connectable Consumers, i. if not all consumer connections the pressurized water supply are actually occupied.

Andererseits kann der bei geöffnetem Absperrventil unvermeidliche Verschleiß des Überströmventiles innerhalb großer Toleranzen hingenommen werden, weil keinerlei Notwendigkeit besteht, das Überströmventil auf einen zumindest angenäherten Schließzustand einstellen zu können bzw. einzustellen. Es muß lediglich gewährleistet bleiben, daß der maximale Drosselwiderstand des Überströmventiles etwas größer bleibt als der Drosselwiderstand des Verbrauchers mit maximalem Drosselwiderstand.On the other hand, the inevitable with open shut-off valve Wear of the overflow valve within large Tolerances are accepted because no need exists, the overflow valve to an at least approximated To be able to set or set the closed state. It only has to be ensured that the maximum Throttle resistance of the overflow valve remains slightly larger as the throttle resistance of the consumer with maximum Throttle resistance.

Zum Zu- und Abschalten der Druckwasserverbraucher sind entsprechend der Anzahl der Druckwasserverbraucher Absperrventile an der Druckwasserversorgung angeordnet. Dabei ist vorzugsweise vorgesehen, diese Absperrventile nahe des Pumpenaggregates anzuordnen bzw. in das Pumpenaggregat zu integrieren und zur Verbindung der Druckwasserverbraucher mit der Druckwasserversorgung vorgesehene Anschlußleitungen bei gesperrtem Absperrventil druckfrei zu machen. To connect and disconnect the pressurized water consumers are accordingly the number of pressurized water consumers shut-off valves arranged at the pressurized water supply. It is preferable provided, these shut-off valves near the pump unit to be arranged or integrated into the pump set and to connect the pressurized water consumers with the pressurized water supply provided connection lines locked shut-off valve pressure-free.

Falls die Druckwasserverbraucher mit sehr hohen Betriebsdrücken und kleinen Fördermengen arbeiten sollen, führt dies bei langen Anschlußleitungen dazu, daß beim Öffnen eines Absperrventiles in der Druckwasserversorgung ein vorübergehender Druckabfall eintritt, bis in der jeweils zugeschalteten Anschlußleitung ein Druck entsprechend dem gewünschten Betriebsdruck des Druckwasserverbrauchers aufgebaut ist.If the pressurized water consumers with very high operating pressures and small flow rates, this leads with long leads to the fact that when opening a shut-off valve in the pressurized water supply a temporary Pressure drop occurs, up in the respectively switched Connecting line a pressure corresponding to the desired operating pressure of the pressurized water consumer is constructed.

Um diesen Druckabfall, der sich auf sämtliche zugeschaltete Druckwasserverbraucher fortpflanzt, zu vermeiden, kann jedem zur Zu- und Abschaltung eines Druckwasserverbrauchers vorgesehenen Absperrventil in Reihe ein Druckhalteventil zugeordnet sein, welches einen von der Druckdifferenz zwischen seinem Eingang und seinem Ausgang abhängigen Drosselwiderstand aufweist, derart, daß bei großer Druckdifferenz ein großer Drosselwiderstand und bei verschwindender Druckdifferenz ein vernachlässigbarer Drosselwiderstand gegeben sind.To this pressure drop, which turned on all Pressurized water consumer propagates can avoid anyone intended for connection and disconnection of a pressurized water consumer Shut-off valve in series assigned to a pressure-holding valve be one of the pressure difference between his Input and its output dependent throttle resistance has, such that at a large pressure difference, a large Throttle resistance and disappearing pressure difference negligible throttle resistance are given.

Im übrigen wird hinsichtlich bevorzugter Merkmale der Erfindung auf die Ansprüche sowie die nachfolgende Erläuterung der Zeichnung verwiesen, anhand der eine besonders bevorzugte Ausführungsform der Erfindung näher beschrieben wird.Incidentally, in terms of preferred features of the invention to the claims and the following explanation referred to the drawing, based on a particularly preferred Embodiment of the invention will be described in more detail.

Dabei zeigt die einzige Figur eine schaltplanartige Darstellung einer erfindungsgemäßen Druckwasserversorgung.The single figure shows a schematic diagram a pressurized water supply according to the invention.

Gemäß der Zeichnung treibt ein Motor 1, welcher mit steuerbarer Drehzahl arbeitet, eine Pumpe 2, die als Druckquelle für Druckwasser vorgesehen ist und dazu Wasser aus einem saugseitig an die Pumpe 2 angeschlossenen Reservoir 3 in eine druckseitig an die Pumpe 2 angeschlossene Verteilerleitung 4 für Druckwasser fördert.According to the drawing drives a motor 1, which with controllable Speed works, a pump 2 acting as a pressure source is intended for pressurized water and water from a suction side connected to the pump 2 reservoir 3 in a on the pressure side connected to the pump 2 distribution line 4 promotes pressurized water.

An die Verteilerleitung 4 ist zur Vermeidung gefährlicher Überdrücke ein Druckbegrenzungsventil 5 angeschlossen. Des weiteren ist an der Verteilerleitung 4 ein normal offenes, sitzgesteuertes Absperrventil 6 mit einem dazu in Reihe geschalteten, vorzugsweise spaltgesteuerten Überströmventil 7 angeordnet, dessen Funktion weiter unten erläutert wird.To the distribution line 4 is dangerous to avoid Overpressures a pressure relief valve 5 connected. Of another is at the distribution line 4 a normally open, seat-controlled shut-off valve 6 with a series-connected, preferably gap-controlled overflow valve 7 whose function is explained below.

Des weiteren besitzt die Verteilerleitung 4 mehrere Abzweigungen, die jeweils durch ein normal geschlossenes, sitzgesteuertes Absperrventil 8,9 bzw. 10 sowie ein dazu in Reihe geschaltetes, vorzugsweise spaltgesteuertes Druckhalteventil 11,12 bzw. 13, dessen Zweck weiter unten erläutert wird, gesteuert werden.Furthermore, the distribution line 4 has several branches, each by a normally closed, seat-controlled Shut-off valve 8,9 and 10 and one in series switched, preferably gap-controlled pressure-holding valve 11,12 and 13, whose purpose will be explained below, controlled become.

Die vorgenannten Ventile können zu einem kompakten Ventilblock 14 zusammengefaßt sein.The aforementioned valves can be a compact valve block 14 summarized.

Das Druckbegrenzungsventil 5 und das Überströmventil 7 können ausgangsseitig mit dem Reservoir 3 verbunden sein. Jedoch ist es auch möglich, das ab- bzw. überströmende Wasser zur Vermeidung einer Erwärmung des Reservoirs 3 ins Freie zu leiten. The pressure limiting valve 5 and the overflow valve 7 can be connected on the output side with the reservoir 3. however It is also possible, the off or overflowing water to prevent the heating of the reservoir 3 to the outside conduct.

Die den Absperrventilen 8 bis 10 im dargestellten Beispiel nachgeschalteten Druckhalteventile 11 bis 13 können ausgangsseitig über Druckschläuche mit Druckwasserverbrauchern, im dargestellten Beispiel mit Spritzlanzen 15 verbunden werden, wie sie zum Abtrag maroden Materials an Bauwerken üblich sind.The shut-off valves 8 to 10 in the example shown downstream pressure holding valves 11 to 13 can the output side via pressure hoses with pressurized water consumers, be connected in the example shown with spray lances 15, as usual for the removal of ailing material on buildings are.

Eine zentrale Steuereinheit 17 steuert einerseits den Motor 1 und andererseits die Ventile 6 bis 13. Außerdem ist die Steuereinheit 17 mit den Betätigungsorganen der Spritzlanzen 15,16 od.dgl. verbunden, wobei die Steuereinheit 17 einerseits die Gesamtzahl der angeschlossenen Spritzlanzen 15,16 bzw. Druckwasserverbraucher erkennt und andererseits den Zustand der Bedienungsorgane der Spritzlanzen 15,16 bzw. Druckwasserverbraucher erfaßt.A central control unit 17 controls the one hand, the engine 1 and on the other hand, the valves 6 to 13. In addition, the Control unit 17 with the actuators of the spray lances 15,16 or the like. connected, wherein the control unit 17 on the one hand the total number of connected spray lances 15,16 or pressure water consumer recognizes and on the other hand, the state the operating organs of the spray lances 15,16 or Pressure water consumer detected.

Zunächst wird der Zustand eines stationären Parallelbetriebes aller angeschlossenen Spritzlanzen 15,16 bzw. Druckwasserverbraucher betrachtet. Während eines solchen Betriebszustandes sind die zu den angeschlossenen Spritzlanzen 15,16 bzw. Druckwasserverbrauchern führenden Absperrventile 8 und 9 sowie die zugeordneten Druckhalteventile 11 und 12 geöffnet, während die Absperrventile 6 und 10 von der Steuereinheit 17 geschlossen gehalten werden. Der Motor 1 wird von der Steuereinheit 17 auf eine solche Arbeitsgeschwindigkeit bzw. Drehzahl eingeregelt, daß sich in der Druckwasser-Verteilerleitung 4 ein mittels eines Drucksensors 18 erfaßbarer Druck entsprechend einem für die jeweiligen Druckmittelverbraucher vorgegebenen Solldruck einstellt. First, the state of a stationary parallel operation all connected spray lances 15,16 or pressurized water consumers considered. During such an operating condition are the connected to the spray lances 15,16 or pressure water consumers leading shut-off valves 8 and 9 and the associated pressure holding valves 11 and 12 are opened, while the shut-off valves 6 and 10 from the control unit 17 be kept closed. The engine 1 is from the control unit 17 to such a working speed or speed regulated that in the pressurized water distribution line 4 a detectable by means of a pressure sensor 18 Pressure corresponding to one for the respective pressure medium consumers set preset target pressure.

Diese Motoreinstellung wird von der Steuereinheit 17 gespeichert.This engine setting is stored by the control unit 17.

Wenn nun eine der Spritzlanzen, beispielsweise die Spritzlanze 15, durch entsprechende Betätigung der zugehörigen Handhabe abgeschaltet wird, erhält die Steuereinheit 17 ein entsprechendes Abschaltsignal und sperrt das der Spritzlanze 15 zugeordnete Absperrventil 8. Gleichzeitig wird das Absperrventil 6 geöffnet und das nachgeschaltete Überströmventil 7, welches als steuerbares Drosselventil ausgebildet ist, so gesteuert, daß der vorgegebene Druck in der Druckwasser-Verteilerleitung 4 aufrechterhalten bleibt, und zwar bei unveränderter Leistung des Motors 1, d.h. die Einstellung der Motorsteuerung und damit die Förderleistung der Pumpe 2 bleiben gegenüber dem vorangehend beschriebenen Zustand - alle angeschlossenen Spritzlanzen 15,16 arbeiten parallel - unverändert.If now one of the spray lances, such as the spray lance 15, by appropriate operation of the associated Handle is turned off, receives the control unit 17 a corresponding shutdown signal and locks the spray lance 15 associated shut-off valve 8. At the same time the shut-off valve 6 open and the downstream relief valve 7, which is designed as a controllable throttle valve is, so controlled that the predetermined pressure in the pressurized water distribution line 4 is maintained, and indeed with unchanged power of the motor 1, i. the attitude the engine control and thus the flow rate of Pump 2 remain opposite to the state described above - All connected spray lances 15,16 work parallel - unchanged.

Falls nur eine der angeschlossenen Spritzlanzen 15 bzw. 16 abgeschaltet wird, wird also das Überströmventil 7 im Ergebnis auf einen Drosselwiderstand eingestellt, der dem Drosselwiderstand der abgeschalteten Spritzlanze beim Spritzbetrieb entspricht. Falls mehrere der angeschlossenen Spritzlanzen 15,16 abgeschaltet werden, wird der Drosselwiderstand des Überströmventiles 7 auf einen verminderten Wert eingestellt, welcher dem Drosselwiderstand der abgeschalteten Spritzlanzen bei Parallelbetrieb entspricht. If only one of the connected spray lances 15 or 16 is turned off, so the spill valve 7 in the result set to a throttle resistance, the throttle resistance the shut off spray lance during spraying operation equivalent. If several of the connected spray lances 15,16 are turned off, the throttle resistance the overflow valve 7 is set to a reduced value, which the throttle resistance of the disconnected Spraying lances in parallel operation corresponds.

Wenn nachfolgend eine der zuvor abgeschalteten Spritzlanzen, beispielsweise die Spritzlanze 15, wieder auf Arbeitsbetrieb geschaltet wird, erhält die Steuereinheit 17 ein entsprechendes Zuschaltsignal und öffnet das dieser Spritzlanze 15 zugeordnete Absperrventil 8. Sobald das Absperrventil 8 geöffnet worden ist, wird das nachgeschaltete Druckhalteventil 11, welches wie die übrigen Druckhalteventile 12 und 13 ein steuerbares Drosselventil darstellt, das jedoch seine vollständig geöffnete Stellung nur bei angenäherter Druckgleichheit auf der Eingangs- und Ausgangsseite des Druckhalteventiles erreichen kann, von seinem stark gedrosselten Zustand zunehmend in den geöffneten Zustand umgesteuert. Diese Umsteuerung erfolgt derart, daß der gewünschte Druck in der Druckwasser-Verteilerleitung 4 aufrechterhalten bleibt, unabhängig davon, ob der gegebenenfalls lange Druckschlauch der Spritzlanze 15 vor Öffnung des Absperrventiles 8 druckfrei war oder nicht.If one of the previously switched off spray lances, for example, the spray lance 15, back to work mode is switched, the control unit 17 receives a corresponding Switching signal and opens the spray lance 15th associated shut-off valve 8. Once the shut-off valve 8 is opened has been, is the downstream pressure relief valve 11, which like the other pressure holding valves 12 and 13 a controllable throttle valve, but this is its complete open position only at approximate equal pressure on the input and output side of the pressure holding valve can reach, from his severely throttled state increasingly reversed to the open state. This reversal takes place such that the desired pressure in the Pressurized water supply line 4 is maintained, regardless of whether the possibly long pressure hose the spray lance 15 before opening the shut-off valve 8 pressure-free was or not.

Mit den Druckhalteventilen 11 bis 13 wird also sicher gewährleistet, daß die Druckschläuche der Spritzlanzen 15,16 ohne nennenswerten Druckabfall in der Druckwasser-Verteilerleitung 4 bei Zuschaltung der jeweiligen Spritzlanze 15,16 auf Betriebsdruck gebracht werden können.With the pressure holding valves 11 to 13 is thus ensured sure that the pressure hoses of the spray lances 15,16 without appreciable pressure drop in the pressurized water distribution line 4 when connecting the respective spray lance 15,16 can be brought to operating pressure.

Beim Beginn des Spritzbetriebes werden zunächst sämtliche angeschlossenen Spritzlanzen 15,16 od.dgl. eingeschaltet, so daß die zentrale Steuereinheit 17 den Motor 1 und damit die Pumpe 2 bei geschlossenem Absperrventil 6 auf den maximalen Förderbedarf bei Parallelbetrieb aller angeschlossenen Spritzlanzen 15,16 einregeln und diesen Zustand speichern kann.At the beginning of the spraying operation, all first connected spray lances 15,16 or the like. turned on, so that the central control unit 17, the engine 1 and thus the Pump 2 with closed shut-off valve 6 to the maximum Demand required for parallel operation of all connected Adjust spraying lances 15, 16 and save this state can.

Nachfolgend können dann während der Spritzarbeit beliebige Spritzlanzen 15,16 abgeschaltet und wieder zugeschaltet werden, wobei die Leistung des Motors 1 bzw. der Pumpe 2 nachgeregelt werden kann, sobald wiederum alle angeschlossenen Spritzlanzen 15,16 arbeiten. Für die nachfolgende Spritzarbeit bleibt dann der nachgeregelte Zustand gespeichert.Subsequently, during the spraying work any Spray lances 15,16 are switched off and switched back on, wherein the power of the motor 1 and the pump 2 readjusted can be as soon as all connected again Spraying lances 15,16 work. For the subsequent spraying work then the readjusted state remains stored.

Im zeichnerisch dargestellten Beispiel ist die Druckwasserversorgung so ausgelegt, daß zusätzlich zu den angeschlossenen Spritzlanzen 15,16 eine weitere Spritzlanze od.dgl. anschließbar ist.In the example shown in the drawing is the pressurized water supply designed so that in addition to the connected Spraying lances 15,16 another spray lance or the like. connectable is.

Falls von dieser Möglichkeit Gebrauch gemacht wird, werden vorübergehend wieder sämtliche angeschlossenen Verbraucher eingeschaltet, so daß der Motor 1 und die Pumpe 2 bei geschlossenem Absperrventil auf den nunmehr erhöhten Maximalbedarf eingeregelt werden können.If this option is used, will be temporarily all connected consumers again turned on, so that the engine 1 and the pump 2 when closed Shut-off valve to the now increased maximum demand can be adjusted.

Gegebenenfalls können an der Steuereinheit 17 verschiedene Betriebsdrücke unterhalb eines maximal erreichbaren Betriebsdruckes eingestellt werden. Durch Steuerleitungen an den Ventilen 5,7,11,12 und 13 können diese automatisch auf den gegebenenfalls verminderten Betriebsdruck angepaßt werden, so daß der vorangehend geschilderte Betriebsablauf auch bei einem verminderten Betriebsdruck, d.h. insbesondere bei Anschluß von Verbrauchern 15,16 für einen verminderten Betriebsdruck, durchgeführt werden kann.Optionally, 17 different on the control unit Operating pressures below a maximum achievable operating pressure be set. Through control lines the valves 5,7,11,12 and 13, these can be on automatically be adapted to the possibly reduced operating pressure, so that the above-described operation also at a reduced operating pressure, i. especially at Connection of consumers 15,16 for a reduced operating pressure, can be carried out.

Um einerseits den Spritzbetrieb zu optimieren und andererseits eine besonders hohe Sicherheit beim Spritzbetrieb zu gewährleisten, kann die Steuereinheit 17 so ausgebildet bzw. programmiert sein, daß bei Betriebsaufnahme verschiedene Lern- bzw. Prüfphasen durchgeführt werden müssen:On the one hand to optimize the spraying operation and on the other hand a particularly high level of safety during spraying operation ensure, the control unit 17 may be formed or be programmed that when operating recording different Learning or testing phases must be carried out:

So kann die Steuereinheit 17 die Einschaltung einer Lernphase erzwingen, in der alle angeschlossenen Verbraucher bzw. Spritzlanzen 15,16 gleichzeitig in Betrieb gesetzt werden müssen. Damit kann die Steuereinheit 17 den Motor 1 mit der Pumpe 2 kurzfristig auf den maximalen Druckwasserverbrauch einregeln und sich die entsprechenden Betriebsparameter des Motors 1 (gegebenenfalls auch der Pumpe 2) "merken", so daß beim späteren Spritzbetrieb insofern allenfalls geringfügige Adaptionen notwendig werden.Thus, the control unit 17, the involvement of a learning phase force in which all connected consumers or Spraying lances 15,16 are put into operation simultaneously have to. Thus, the control unit 17, the engine 1 with the Pump 2 short-term to the maximum pressure water consumption adjust the appropriate operating parameters of the Engine 1 (possibly also the pump 2) "remember", so that at the later spraying operation so far at best slight Adaptations become necessary.

Des weiteren kann in einer Prüfphase vorgesehen sein, daß alle angeschlossenen Verbraucher bzw. Spritzlanzen 15,16 nacheinander einzeln in Betrieb gesetzt werden. Damit wird sofort erkennbar, ob das Bedienungsorgan des jeweiligen Verbrauchers bzw. der jeweiligen Spritzlanze 15,16 an der Steuereinheit 17 mit demjenigen Steuereingang verbunden ist, welcher demjenigen Absperrventil 8,9,10 zugeordnet ist, das seinerseits den Anschluß des jeweiligen Verbrauchers bzw. der jeweiligen Spritzlanze 15,16 steuert. Sollten eine oder mehrere Verbraucheranschlußschläuche und/oder Fernsteuerleitungen zwischen den Bedienungsorganen der Verbraucher und der Steuereinheit 17 vertauscht sein, könnte dies in dieser Prüfphase sofort bemerkt und korrigiert werden.Furthermore, it may be provided in a test phase that all connected consumers or spray lances 15,16 be put into operation one after the other. This will be immediately recognizable, whether the operating organ of the respective consumer or the respective spray lance 15,16 on the control unit 17 is connected to the control input, which is associated with that shut-off valve 8,9,10, the in turn, the connection of the respective consumer or the respective spray lance 15,16 controls. Should one or several consumer connection hoses and / or remote control lines between the consumer controls and The control unit 17 may be reversed, this could be in this Test phase immediately noticed and corrected.

Abweichend von der zeichnerisch dargestellten Ausführungsform können die Druckhalteventile 11,12,13 auch eingangsseitig der Absperrventile 8,9,10 angeordnet sein.Notwithstanding the illustrated embodiment can the pressure holding valves 11,12,13 also on the input side the shut-off valves 8,9,10 be arranged.

Des weiteren kann das Absperrventil 6 auch ausgangsseitig des Überströmventiles 7 angeordnet sein.Furthermore, the shut-off valve 6 also on the output side the overflow valve 7 may be arranged.

Claims (7)

  1. A hydraulic supply unit with multiple parallel hydraulic consumers (15, 16) that can be switched on and switched off separately, an overflow assembly (6, 7) parallel to the hydraulic consumers for conducting excess hydraulic supply, a pump unit (1, 2) with controllable output, and a control unit (17) for controlling the output of the pump,
    wherein the control unit (17) adjusts or regulates the pump unit (1, 2) upon switching-on of all consumers (15, 16) as well as a closed-off overflow assembly until reaching an output required for maintaining a nominal pressure,
    characterized in that,
    the control unit (17) controls the overflow assembly and the control unit, upon switching off of one of more of the connected hydraulic consumers (15, 16), holds at least substantially unchanged the delivery rate and controls the overflow assembly (6, 7) for maintaining the nominal pressure, and
    that the overflow assembly (6, 7) has a check valve (6) as well as a controllable overflow valve (7) arranged in series thereto, whose maximal throttle resistance is greater than the throttle resistance of the hydraulic consumer with maximum throttle resistance.
  2. The hydraulic supply unit with multiple parallel hydraulic consumers (15, 16) that can be switched on and switched off separately, an overflow assembly (6, 7) parallel to the hydraulic consumers for conducting excess hydraulic supply, and a pump unit (1, 2) with controllable output according to claim 1,
    characterized in that,
    each consumer (15, 16) can be switched on via a separate check valve (8, 9, 10) and a pressure retention valve (11, 12, 13) arranged in a series thereto.
  3. The hydraulic supply unit according to claim 1 or 2,
    characterized in that,
    all check valves (6, 8, 9, 10) are seat-controlled.
  4. The hydraulic supply unit according to one of claims 1 through 3,
    characterized in that,
    the overflow valve (7) and/or the pressure retention valve (8, 9, 10) are gap-controlled.
  5. The hydraulic supply unit according to one of claims 1 through 4,
    characterized in that,
    a control unit (17), upon switching-on of all connected consumers (15, 16), closes off the overflow assembly (6, 7) and regulates the pump assembly (1, 2) or its drive (10) for maintaining a predetermined pressure.
  6. The hydraulic supply unit according to one of claims 1 through 5,
    characterized in that
    upon switching-off of at least one of the connected consumers (15, 16), the pump assembly (1, 2) or its drive (1) is held by the control unit (17) near a power for switching-on of all connected consumers, and for maintaining a predetermined pressure, the overflow assembly (6, 7) is actuated accordingly.
  7. The hydraulic supply unit according to one of claims 1 through 6,
    characterized in that,
    the control unit (17) determines the number of connected hydraulic consumers (15, 16).
EP01105014A 2000-03-23 2001-03-01 Pressurised water supply Expired - Lifetime EP1136702B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10014045A DE10014045B4 (en) 2000-03-23 2000-03-23 Water Supply
DE10014045 2000-03-23

Publications (3)

Publication Number Publication Date
EP1136702A2 EP1136702A2 (en) 2001-09-26
EP1136702A3 EP1136702A3 (en) 2003-09-10
EP1136702B1 true EP1136702B1 (en) 2005-05-18

Family

ID=7635812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01105014A Expired - Lifetime EP1136702B1 (en) 2000-03-23 2001-03-01 Pressurised water supply

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EP (1) EP1136702B1 (en)
AT (1) ATE295942T1 (en)
DE (2) DE10014045B4 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1898095A1 (en) * 2006-09-06 2008-03-12 Claudio Rossner Control unit for ventilation device
DE102014100530A1 (en) 2014-01-17 2015-07-23 Alfred Kärcher Gmbh & Co. Kg Switch valve device and high-pressure liquid system comprising a switching valve device
CN113757200B (en) * 2021-08-31 2023-05-12 三一汽车制造有限公司 Hydraulic system, engineering machinery and control method of hydraulic system
CN115949635A (en) * 2022-11-30 2023-04-11 福建侨龙应急装备股份有限公司 Hydraulic system, water supply and drainage vehicle and hydraulic system control method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413295B2 (en) * 1974-03-20 1978-02-02 Robert Bosch Gmbh, 7000 Stuttgart CONTROL DEVICE FOR AN ADJUSTABLE PUMP
SE7406518L (en) * 1974-05-16 1975-11-17 Euroclean Ab CONTROL DEVICE FOR A WASHING SYSTEM.
US4593858A (en) * 1985-04-01 1986-06-10 Butterworth, Inc. Fail-safe high pressure fluid delivery system
FR2686813B1 (en) * 1992-02-05 1994-05-06 Joly Gilles SYSTEM FOR THE DISTRIBUTION OF WATER PROVIDED AT HIGH PRESSURE AND RECOVERY OF THIS WATER AND OF WASTE OCCASIONED BY STRIPPING.
DE69617634T2 (en) * 1995-07-10 2002-05-08 Hitachi Construction Machinery Co., Ltd. HYDRAULIC CONTROL DEVICE
DE29516166U1 (en) * 1995-10-12 1996-01-11 Wap Reinigungssysteme Gmbh & Co, 89287 Bellenberg Pressure generating device with pressure cut-off and bypass

Also Published As

Publication number Publication date
DE50106241D1 (en) 2005-06-23
EP1136702A2 (en) 2001-09-26
DE10014045A1 (en) 2001-10-11
DE10014045B4 (en) 2005-05-25
EP1136702A3 (en) 2003-09-10
ATE295942T1 (en) 2005-06-15

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