EP0255947A2 - Appareil produisant un jet pulsatoire de liquide - Google Patents

Appareil produisant un jet pulsatoire de liquide Download PDF

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Publication number
EP0255947A2
EP0255947A2 EP87111322A EP87111322A EP0255947A2 EP 0255947 A2 EP0255947 A2 EP 0255947A2 EP 87111322 A EP87111322 A EP 87111322A EP 87111322 A EP87111322 A EP 87111322A EP 0255947 A2 EP0255947 A2 EP 0255947A2
Authority
EP
European Patent Office
Prior art keywords
liquid
jet
valve
pressure
generator according
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.)
Withdrawn
Application number
EP87111322A
Other languages
German (de)
English (en)
Other versions
EP0255947A3 (fr
Inventor
Itzhak Fritz Ing. Lustig
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.)
Dr Fehr GmbH
Original Assignee
Dr Fehr GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dr Fehr GmbH filed Critical Dr Fehr GmbH
Publication of EP0255947A2 publication Critical patent/EP0255947A2/fr
Publication of EP0255947A3 publication Critical patent/EP0255947A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
    • B05B12/06—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery for effecting pulsating flow

Definitions

  • the invention relates to a periodically acting liquid jet generator.
  • the task is solved by a pump unit for increasing the pressure of liquid and a jet pipe with nozzle, connected by a storage for liquid, equipped with a backflow-preventing loading valve and a periodically acting discharge valve for generating a working cycle, which consists of a loading period and a shorter discharge period .
  • the liquid serves as a carrier liquid for taking up at least one additive.
  • a periodically operating pressure generator is provided for each additive that is introduced into the jet pipe.
  • the pressure generators are expediently operated in synchronism with the unloading valve.
  • the discharge valve is advantageously closed longer than the charging period, so that the charging period is followed by a rest period.
  • a shorter discharge period results in a larger energy content in the emerging jet and increases its throwing distance and impact force.
  • this period must be long enough to discharge the required amount of liquid with each surge.
  • a ratio of charging period to discharging period of three to five is expected.
  • the periodic discharge valve and the control valves of the additive pressure generators can be operated in any manner, for example mechanically, pneumatically, hydraulically or electrically, or they can be controlled by an external timer or by feedback from the pressure system.
  • the accumulator is loaded by the pressure sensitive check valve while the discharge valve is closed. In this way, the charge pressure increases up to the dynamic pressure of the charge flow and thus exceeds the delivery pressure. This closes the check valve and ends the loading period. If the charging process is shorter than the completion time of the unloading valve, there is a pause in which both valves remain closed. Afterwards or immediately after the loading process has ended, the unloading valve opens and one follows Discharge period during which the stored liquid flows into the jet pipe, mixes with the additives and is expelled from the nozzle in the form of a liquid jet. The accumulator pressure drops during this process. At the end of the discharge period, the discharge valve closes and a period begins. The pressure sensitive check valve opens as soon as the storage pressure is lower than the delivery pressure.
  • the amount of liquid that is consumed for a jet blow must be pressed into the reservoir by the pump.
  • the memory is dimensioned so that its content exceeds the amount ejected and it does not completely empty at the end of the discharge period.
  • the pressure generator for the additive is a liquid-driven piston or diaphragm pump with force feedback. It is operated in synchronism with the unloading valve. During the rest period, the cylinder fills up by sucking the additive out of a storage container and the filling is pressed into the jet pipe during the discharge period.
  • the operating pressure of the cylinder is the output pressure of the pressure generator of the carrier stream and the introduction of the additive into the jet pipe is made possible by the relatively high pressure drop at the unloading valve.
  • the unit 1 is connected on the input side to a pump 4, which sucks the carrier liquid from the tank 3 and brings it to the delivery pressure and which is connected on the output side to a jet pipe 8.
  • the unit 1 consists of a gas-loaded accumulator 6, in the input of which the pressure-sensitive check valve 5 is located and the output of which is controlled by the periodically acting discharge valve 7.
  • Unit 2 is the additive pump. It consists of a pump cylinder 10 with a return spring 18, which is connected on the inlet side to the outlet of the pump 4 by a normally closed solenoid valve 11. It is connected to the tank 3 by a normally open solenoid valve 12. On the output side, the cylinder is connected to the reservoir for the additive 15 by a suction valve 14 and supplies the additive to the jet pipe through the pressure valve 13.
  • the valves 11 and 12 and the unloading valve 7 are connected to the electrical clock generator 16 by a line.
  • the working circuit of the jet generator can be triggered or interrupted by a switching element, not shown.
  • the periodically acting jet generator described above works as follows: Liquid under pressure enters the accumulator 6 through the check valve 5 while the discharge valve 7 is closed. The pressure in the accumulator increases and the gas is compressed until the accumulator pressure exceeds the delivery pressure of the pump and the speed of the moving liquid. The check valve 6 prevents the liquid from flowing back, so that the storage pressure remains higher than the delivery pressure of the pump. This will end the charging period.
  • the loading period is followed by a Rest period during which valves 5 and 7 remain closed, or the discharge period can begin immediately.
  • the valve 7 opens by a signal from the clock generator 16 and hydraulic fluid flows into the jet pipe and is expelled through the nozzle 9 in the form of a free jet.
  • the pressure in the accumulator 6 drops until the valve 7 closes again.
  • a spring-loaded or weight-loaded storage can also be used.
  • the carrier liquid enters the pump cylinder 10 through the valve 11 and moves the piston 17 forward against the spring force.
  • valve 11 closes and valve 12 opens as soon as the signal from clock generator 16 drops to zero.
  • the drive side of the cylinder 10 is connected to the tank 3, the spring 18 pushes the piston 17 back and the cylinder 10 empties the liquid from the drive side into the tank 3.
  • the pressure side of the cylinder 10 fills with the additive through the suction valve 14 from the container 15.
  • the piston 17 is moved by the carrier liquid and the additive is pressed into the jet pipe 8 by the pressure valve 13. This is made possible by the pressure drop across the unloading valve 7, so that the outlet pressure of the unit 1 is lower than the outlet pressure of the pump cylinder 10.
  • the minimum effective content of the cylinder 10 is calculated so that the required amount of additive is achieved with each liquid discharge.
  • the jet of liquid leaving the nozzle 9 has an average velocity which is higher than that through the delivery pressure can be enabled and has an outflow rate that exceeds the influence in the memory in the ratio t e / t a ; where t e and t a are the time lengths of the charging and discharging periods. It is therefore possible to generate a free jet with a large throw range and high energy concentration with a low liquid consumption.

Landscapes

  • Nozzles (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP87111322A 1986-08-07 1987-08-05 Appareil produisant un jet pulsatoire de liquide Withdrawn EP0255947A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3626719 1986-08-07
DE19863626719 DE3626719A1 (de) 1986-08-07 1986-08-07 Periodisch wirkender fluessigkeitsstrahl-erzeuger

Publications (2)

Publication Number Publication Date
EP0255947A2 true EP0255947A2 (fr) 1988-02-17
EP0255947A3 EP0255947A3 (fr) 1989-06-28

Family

ID=6306854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111322A Withdrawn EP0255947A3 (fr) 1986-08-07 1987-08-05 Appareil produisant un jet pulsatoire de liquide

Country Status (2)

Country Link
EP (1) EP0255947A3 (fr)
DE (1) DE3626719A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0336198A2 (fr) * 1988-04-02 1989-10-11 Dr. Karl Thomae GmbH Dispositifs de commande de la distribution de quantités dosées de liquides pulvérisés répartis dans un gaz
EP1219360A2 (fr) * 2000-12-28 2002-07-03 Bionik GmbH - Innovative Technik für die Umwelt Procédé et dispositif pour produire un flux de liquide de lavage intermittent, en particulier d'eau
WO2010018007A1 (fr) * 2008-08-09 2010-02-18 Dürr Ecoclean GmbH Dispositif et procédé de formation d'un jet pulsé d'un fluide liquide

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2109271A (en) * 1981-11-25 1983-06-02 Vauldale Engineering Limited Pulsating liquid jet apparatus
SU1141228A1 (ru) * 1983-06-20 1985-02-23 Курский Политехнический Институт Гидроимпульсное устройство

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2109271A (en) * 1981-11-25 1983-06-02 Vauldale Engineering Limited Pulsating liquid jet apparatus
SU1141228A1 (ru) * 1983-06-20 1985-02-23 Курский Политехнический Институт Гидроимпульсное устройство

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0336198A2 (fr) * 1988-04-02 1989-10-11 Dr. Karl Thomae GmbH Dispositifs de commande de la distribution de quantités dosées de liquides pulvérisés répartis dans un gaz
DE3811261A1 (de) * 1988-04-02 1989-10-19 Thomae Gmbh Dr K Vorrichtungen zur gesteuerten freisetzung dosierter mengen von in gasen feinverteilten fluessigkeiten
EP0336198A3 (fr) * 1988-04-02 1990-08-16 Dr. Karl Thomae GmbH Dispositifs de commande de la distribution de quantités dosées de liquides pulvérisés répartis dans un gaz
EP1219360A2 (fr) * 2000-12-28 2002-07-03 Bionik GmbH - Innovative Technik für die Umwelt Procédé et dispositif pour produire un flux de liquide de lavage intermittent, en particulier d'eau
EP1219360A3 (fr) * 2000-12-28 2003-10-01 Bionik GmbH - Innovative Technik für die Umwelt Procédé et dispositif pour produire un flux de liquide de lavage intermittent, en particulier d'eau
WO2010018007A1 (fr) * 2008-08-09 2010-02-18 Dürr Ecoclean GmbH Dispositif et procédé de formation d'un jet pulsé d'un fluide liquide
US8702872B2 (en) 2008-08-09 2014-04-22 Dürr Ecoclean GmbH Device and process for generating a pulsed jet of a liquid fluid

Also Published As

Publication number Publication date
DE3626719A1 (de) 1988-02-11
EP0255947A3 (fr) 1989-06-28

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Inventor name: LUSTIG, ITZHAK FRITZ, ING.