EP1247896A2 - Procédé et dispositif de surveillance du fonctionnement des buses de pulvérisation - Google Patents

Procédé et dispositif de surveillance du fonctionnement des buses de pulvérisation Download PDF

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Publication number
EP1247896A2
EP1247896A2 EP02002826A EP02002826A EP1247896A2 EP 1247896 A2 EP1247896 A2 EP 1247896A2 EP 02002826 A EP02002826 A EP 02002826A EP 02002826 A EP02002826 A EP 02002826A EP 1247896 A2 EP1247896 A2 EP 1247896A2
Authority
EP
European Patent Office
Prior art keywords
spray
jet
spray jet
measuring arrangement
nozzles
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Withdrawn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
EP02002826A
Other languages
German (de)
English (en)
Other versions
EP1247896A3 (fr
Inventor
Joachim Dr. Grabscheid
Ulrich Begemann
Oswald Satzger
Wolfgang Mayer
Ralf Rziha
Wolfganf Dr. Bamberger
Georg Dr. Kleiser
Thomas RÜHL
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent 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 Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1247896A2 publication Critical patent/EP1247896A2/fr
Publication of EP1247896A3 publication Critical patent/EP1247896A3/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Withdrawn legal-status Critical Current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
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/32—Washing wire-cloths or felts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/34—Construction or arrangement of spraying pipes
    • 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
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/082—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to a condition of the discharged jet or spray, e.g. to jet shape, spray pattern or droplet size

Definitions

  • the invention relates to methods and associated devices for monitoring the function of spray nozzle arrangements in machines for manufacturing and / or Refinement of paper, cardboard, tissue or other fibrous webs, the Spray nozzles at least in one row next to each other across the machine direction are arranged.
  • the nozzles can be caused by particles contained in the spray water pollute. Deposits can change the spray pattern and thus the uniform Disrupt water distribution or even clog the nozzles.
  • the object of the invention is the rapid detection of malfunctions in the spray nozzles with as little effort as possible.
  • the object was achieved on the one hand in that the function of the Spray nozzles on the measurement of the flow pulse of the spray jet of the respective Spray nozzle is detected.
  • the function the spray nozzles on the influence of a light beam by the spray jet is recorded.
  • the one reflected by the spray jet can Part and / or the part of the light beam passing through the spray jet is measured become. In any case, changes in the proportion of the received light beam indicate for disturbances of the spray jet.
  • Both methods enable the rapid detection of faults in individual or several spray nozzles and thus a quick reaction to it. As a result Alarm is triggered or a similar-looking device is put into operation.
  • the pressure of the spray liquid can also increase over a short period of time be counteracted, so that a reduction in the flow impulse is counteracted.
  • the methods and the devices described below are particularly suitable especially for use in a cross-machine direction running spray tube with several, arranged side by side spray nozzles for Conditioning screens, felts and tapes with cleaning fluid, in particular Water.
  • the endless belts, sieves, but especially the press felts of press sections must be cleaned and dried using so-called conditioning devices become.
  • the tapes, sieves and felts should Parameters that are as uniform as possible across the machine direction, above all have a uniform moisture profile.
  • Spray pipes often come with it the spray width distributed spray nozzles for use. Guide faulty spray nozzles consequently to an uneven water distribution across the web width and impair thus the quality of the fibrous web in the corresponding machine section.
  • the high-pressure jets should therefore be clearly and sharply delineated. contaminated Spray nozzles lead to a widened, turbulent and milky spray jet.
  • a measuring arrangement consisting of a Light transmitter and a light receiver connected to a control unit is. Because of the simplicity, a measuring arrangement can be assigned to each spray jet so that the response time in the event of faults is very short. Should he Effort can be reduced, it is possible that the measuring arrangement along several Spray blasting is designed to be traversable.
  • the mechanical process directed at the flow pulse is preferred implemented in that the measuring arrangement is connected to a control unit Flow pulse meter is formed and along several spray jets is designed to be traversable. Because the flow pulse meter placed in the spray jet traversing not only leads to a limitation of the effort, but also to minimize the influence of each spray jet. Of course, this advantage is particularly great when the measurement arrangement is along all spray jets are designed to be traversable.
  • the minimum time required is decisive for the type of execution Measurement of a spray jet and the maximum desired time interval of the measurements a spray jet, since the latter of course the reaction time of the measuring arrangement impressed.
  • the flow pulse of the respective spray jet can be from a tachometer be measured, which with an impeller placed in the spray jet is coupled.
  • the flow impulse is measured by a pressure gauge placed in the spray jet. It is advantageous if there is an orifice between the pressure gauge and the spray nozzle a measuring opening to limit the part of the spray jet to be detected is.
  • the measuring opening should be so large that an acceptable spray jet this can pass unhindered while a widened as a result of a nozzle malfunction Spray jet is partially intercepted. This increases the measuring accuracy of the Pressure gauge.
  • a felt 1 for conditioning is a cross-machine direction 11 extending spray tube 12 assigned.
  • the felt 1 is around an endlessly rotating press felt of a press nip of a press section Drainage of the fibrous web.
  • the spray tube 12 has spray nozzles directed at the felt 1 at regular intervals 2 for moistening the same. So that this not only in, but also across Machine direction 11, d. H. the tape running direction is as even as possible, the function of the spray nozzles 2 must be monitored.
  • repair measures can be taken immediately be initiated so that the impact on the manufacturing process of the Stay fibrous web minimal.
  • FIG. 2 shows a traversing measuring arrangement.
  • the function of the spray nozzles 2 is not constant, but time-cyclical detected.
  • the pressure exerted by the spray jet 4 on a pressure gauge 8 is measured, for which purpose the pressure gauge 8 is moved between felt 1 and spray nozzle 2.
  • the Pressure is proportional to the flow impulse, so its reduction from Normal means a malfunction of the spray nozzle 2.
  • spray jets 4 become more normal Extension all the way to the pressure gauge 8. This is achieved through an aperture 9 with a measuring opening 10 to limit the part to be detected of the spray jet 4, which is arranged between the spray nozzle 2 and the pressure gauge 8 is. If the spray jet 4 is widened due to a nozzle fault, the bounces outer part of the spray jet 4 from the aperture 9. As a result, with disturbed spray jets 4 only a part of the respective spray jet 4 reaches the pressure gauge 8 the sensitivity to the detection of faults.
  • the flow pulse should be detected by evaluating the rotation of an impeller are, the impeller is partially driven into the spray jet 4 for this purpose.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
EP02002826A 2001-04-04 2002-02-08 Procédé et dispositif de surveillance du fonctionnement des buses de pulvérisation Withdrawn EP1247896A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10116666A DE10116666A1 (de) 2001-04-04 2001-04-04 Spritzdüsen
DE10116666 2001-04-04

Publications (2)

Publication Number Publication Date
EP1247896A2 true EP1247896A2 (fr) 2002-10-09
EP1247896A3 EP1247896A3 (fr) 2004-01-02

Family

ID=7680276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02002826A Withdrawn EP1247896A3 (fr) 2001-04-04 2002-02-08 Procédé et dispositif de surveillance du fonctionnement des buses de pulvérisation

Country Status (2)

Country Link
EP (1) EP1247896A3 (fr)
DE (1) DE10116666A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2507069A (en) * 2012-10-17 2014-04-23 Siemens Plc Monitoring the quality of an electrostatic coating by measuring light reflected from a spray
EP2799830A4 (fr) * 2011-12-28 2015-08-26 Posco Dispositif de capteur et appareil d'évaluation de performance de système de refroidissement le comprenant

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE444495C (de) * 1927-08-09 Heinrich Schaaf Um ihre Laengsachse drehbare Spritzvorrichtung zum Reinigen der Siebe und Filze, zumFeuchten des Papiers und aehnlicher Stoffe in Papier- und aehnlichen Maschinen
JPS6295161A (ja) * 1985-10-18 1987-05-01 Toyo Seikan Kaisha Ltd スプレイモニタ装置
JPH0771688B2 (ja) * 1991-03-27 1995-08-02 株式会社神戸製鋼所 水冷用ノズルの詰まり検出方法
US5312039A (en) * 1992-06-22 1994-05-17 Vlsi Technology, Inc. Electro-optic monitor for fluid spray pattern
DE4447378A1 (de) * 1994-12-22 1996-06-27 Optronik Gmbh Opto Elektronisc Anordnung zur Erkennung von Inhomogenitäten beim Dosieren von fließfähigen Stoffen
JP3520634B2 (ja) * 1995-11-13 2004-04-19 日産自動車株式会社 液体噴射ノズルの目詰まり検出装置
DE19543869A1 (de) * 1995-11-24 1997-05-28 Seidenader Maschinenbau Gmbh Verfahren und Vorrichtung zur kontinuierlichen Überwachung der Flüssigkeitszugabe
US6065203A (en) * 1998-04-03 2000-05-23 Advanced Energy Systems, Inc. Method of manufacturing very small diameter deep passages

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2799830A4 (fr) * 2011-12-28 2015-08-26 Posco Dispositif de capteur et appareil d'évaluation de performance de système de refroidissement le comprenant
GB2507069A (en) * 2012-10-17 2014-04-23 Siemens Plc Monitoring the quality of an electrostatic coating by measuring light reflected from a spray

Also Published As

Publication number Publication date
EP1247896A3 (fr) 2004-01-02
DE10116666A1 (de) 2002-10-10

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