EP0633416A1 - Device and procedure for throtteling a fluidal pulp slurry without getting choked - Google Patents

Device and procedure for throtteling a fluidal pulp slurry without getting choked Download PDF

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Publication number
EP0633416A1
EP0633416A1 EP94109147A EP94109147A EP0633416A1 EP 0633416 A1 EP0633416 A1 EP 0633416A1 EP 94109147 A EP94109147 A EP 94109147A EP 94109147 A EP94109147 A EP 94109147A EP 0633416 A1 EP0633416 A1 EP 0633416A1
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EP
European Patent Office
Prior art keywords
valve
main flow
liquid
flow direction
hollow body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94109147A
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German (de)
French (fr)
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EP0633416B1 (en
Inventor
Ulrich Begemann
Helmut Heinzmann
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JM Voith GmbH
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JM Voith GmbH
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Filing date
Publication date
Priority claimed from DE4402516A external-priority patent/DE4402516C2/en
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Priority to EP96118580A priority Critical patent/EP0766031B1/en
Publication of EP0633416A1 publication Critical patent/EP0633416A1/en
Application granted granted Critical
Publication of EP0633416B1 publication Critical patent/EP0633416B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox
    • 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
    • D21F1/06—Regulating pulp flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits

Definitions

  • the invention relates to a device and a method for the non-clogging throttling of fluid flows, in particular stock suspension streams in paper machines and paper processing plants.
  • Valves in a wide variety of designs are state of the art for throttling fluid flows.
  • Significant disadvantages of these valves e.g. Ball valves, flap valves, needle valves and the like is that they produce relatively narrow cross sections to set a desired flow rate. It is known with such valves that cross-sections of this size tend to clog undesirably when flowing through stock suspension and produce fiber wipes - local fiber accumulations - and deposits when operated in paper machines. Either there is blockage of the valve or fiber wiping or deposits are not resolved before the sheet formation process begins due to the lack of influence of shear forces, which in the best case creates formation flows in the paper web. However, experience shows that inhomogeneities of this type in the sheet often represent the starting point for tearing off the entire paper web and thus lead to decisive malfunctions in a paper machine.
  • the invention is based on the object of describing a valve or at least one throttle element, in which the formation of fibers or the risk of clogging is avoided by suitable design.
  • the inventors have recognized that the tendency for clogging in a valve, in particular in the case of a valve type which corresponds to a needle valve, can be decisively reduced if a rotation component is added to the flow in the region of the narrowest point of the valve.
  • the rotation component dissolves any turbulence that may be present, and the resulting fiber wiping or fiber accumulation, which can then lead to blockages.
  • FIG. 1 shows a throttle device 1 according to the invention in cross section.
  • the throttle device consists of an essentially rotationally symmetrical cylindrical cavity with a constriction 3.
  • a fluid flow perpendicular to the axis of the cylindrical cavity is fed to the cavity via an eccentrically arranged radius-parallel feed 4.
  • the fluid flow S thus enters the cavity tangentially and is thereby deflected to the axial direction of the cavity. In this way, the flow S receives a spiral course within the cylindrical cavity.
  • a plunger 2 is axially mounted in this cavity, which in the present case is provided with an extension on the lower side, that is to say the side facing the throttling.
  • the plunger 2 is slidably provided in the axial direction, so that by axially moving this plunger a cross-sectional constriction similar to one Needle valve is effected.
  • the tangentially introduced flow causes sufficient flushing around the narrow point, so that at this point no blockages can occur due to solids carried in the flow. This is particularly advantageous in the case of stock suspension flows in paper machines, in which such blockages, that is to say fiber wiping, can have very unfavorable effects on the quality of the paper produced.
  • FIG. 2 shows the section A-A through the throttle device from FIG. 1.
  • the above-described tangential feed of the flow S into the cylindrical interior of the throttle device is clearly shown.
  • the invention is of course not limited to a purely tangential supply of the flow into the throttling space of a throttling device.
  • FIG. 3 shows the application of the valve shown in FIGS. 1 and 2 using the example of the regulated supply of dilution water into the main flow of the stock suspension in a headbox.
  • Two cross-distributors Q1 and Q2 are shown, the stock suspension being fed from the cross-distributor Q1 in a slightly increased concentration via a main line H to the headbox STA.
  • a supply of dilution water into the main stream H is shown on the main line H at an angle unequal to 90 °.
  • the feed consists essentially of the throttle element 1 itself, the throttle element having the same design as the element shown in FIG. 1 and with its feed line being connected directly to the second cross distributor Q2, which carries the dilution water.
  • the correct choice of the angle between the main flow H and the secondary flow N supplied by the throttle device ensures that the sum of the suspension quantity led to the headbox remains constant irrespective of the flow quantity of the secondary flow N supplied.
  • the design of the throttling device 1 avoids any fiber wiping in the throttling device, so that there is no fear of quality losses in the paper produced.
  • the throttle device 1 is operated in such a way that an average amount of stock suspension is passed through the throttle device 1 at the normal operating point, as a result of which no settling processes of solids in the throttle device are possible.
  • the regulation of the consistency that is to say the concentration of the total suspension from the streams N and H, then takes place around this middle operating point, the sum of the total stream remaining constant and a very carefully metered control of the concentration being achieved by the design of the throttle device 1.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paper (AREA)
  • Disintegrating Or Milling (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Safety Valves (AREA)
  • Taps Or Cocks (AREA)
  • Sliding Valves (AREA)
  • Multiple-Way Valves (AREA)

Abstract

The throttle valve, for a fluid flow and especially a dispersion of solids, has a fluid feed to the passage surface which imposes a rotary flow component in relation to the main flow direction line and around it. Also claimed is a feed system operation, where the fluid flow is given a rotary component round the main flow line, for a throttling cross-section with a rotary symmetrical shape.

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur verstopfungsfreien Drosselung von fluiden Strömungen, insbesondere von Stoffsuspensionsströmen in Papiermaschinen und Papierstoff-Aufbereitungsanlagen.The invention relates to a device and a method for the non-clogging throttling of fluid flows, in particular stock suspension streams in paper machines and paper processing plants.

Zur Drosselung von fluiden Strömen sind Ventile in vielfältigster Bauart Stand der Technik. Wesentliche Nachteile dieser Ventile wie z.B. Kugelventile, Klappenventile, Nadelventile und ähnlichen ist, daß sie zur Einstellung eines gewünschten Strömungsdurchsatzes relativ enge Querschnitte erzeugen. Es ist bei solchen Ventilen bekannt, daß Querschnitte dieser Größe beim Durchströmen mit Stoffsuspension in ungewünschter Weise zum Verstopfen neigen und beim Betrieb in Papiermaschinen Faserwische - lokale Faseranhäufungen - und Ablagerungen erzeugen. Entweder kommt es dabei zu Verstopfungen des Ventils oder es werden Faserwische oder Ablagerungen durch das Fehlen des Einflusses von Scherkräften vor Beginn des Blattbildungsprozesses nicht wieder aufgelöst, wodurch im günstigsten Fall Formationsströmungen in der Papierbahn entstehen. Jedoch die Erfahrung zeigt, daß Inhomogenitäten dieser Art im Blatt häufig Ausgangspunkt von Abrissen der gesamten Papierbahn darstellen und damit zu entscheidenden Betriebsstörungen einer Papiermaschine führen.Valves in a wide variety of designs are state of the art for throttling fluid flows. Significant disadvantages of these valves, e.g. Ball valves, flap valves, needle valves and the like is that they produce relatively narrow cross sections to set a desired flow rate. It is known with such valves that cross-sections of this size tend to clog undesirably when flowing through stock suspension and produce fiber wipes - local fiber accumulations - and deposits when operated in paper machines. Either there is blockage of the valve or fiber wiping or deposits are not resolved before the sheet formation process begins due to the lack of influence of shear forces, which in the best case creates formation flows in the paper web. However, experience shows that inhomogeneities of this type in the sheet often represent the starting point for tearing off the entire paper web and thus lead to decisive malfunctions in a paper machine.

Der Erfindung liegt die Aufgabe zugrunde ein Ventil bzw. zumindest ein Drosselorgan zu beschreiben, bei dem durch geeignete konstruktive Ausstattung die Faserwischbildung bzw. die Verstopfungsgefahr vermieden wird.The invention is based on the object of describing a valve or at least one throttle element, in which the formation of fibers or the risk of clogging is avoided by suitable design.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruches 1, bzw. durch den Verfahrensanspruch 4 gelöst.This object is achieved by the characterizing features of claim 1 or by method claim 4.

Die Erfinder haben erkannt, daß sich die Verstopfungsneigung in einem Ventil, insbesondere bei einer Ventilbauart, die einem Nadelventil entspricht, entscheidend reduzieren läßt, wenn man der Strömung im Bereich der engsten Stelle des Ventiles eine Rotationskomponente zufügt. Die Rotationskomponente bewirkt eine Auflösung von eventuell vorhandenen Turbulenzen, und den dabei entstehenden Faserwischen bzw. Faseranhäufungen die dann zu Verstopfungen führen können.The inventors have recognized that the tendency for clogging in a valve, in particular in the case of a valve type which corresponds to a needle valve, can be decisively reduced if a rotation component is added to the flow in the region of the narrowest point of the valve. The rotation component dissolves any turbulence that may be present, and the resulting fiber wiping or fiber accumulation, which can then lead to blockages.

Die Erfindung ist anhand der Figuren näher beschrieben. Darin ist im übrigen folgendes gezeigt:

Figur 1:
Querschnitt durch ein erfindungsgemäßes Ventil.
Figur 2:
Schnitt A-A des erfindungsgemäßen Ventils aus Figur 1.
Figur 3:
Anwendung des erfindungsgemäßen Ventils in der Stoffsuspensionszuführung eines Stoffauflaufes.
The invention is described in more detail with reference to the figures. It also shows the following:
Figure 1:
Cross section through a valve according to the invention.
Figure 2:
Section AA of the valve according to the invention from FIG. 1.
Figure 3:
Application of the valve according to the invention in the stock suspension feed of a headbox.

Figur 1 zeigt eine erfindungsgemäße Drosselvorrichtung 1 im Querschnitt. In der gezeigten schematischen Darstellung besteht die Drosselvorrichtung aus einem im wesentlichen rotationssymmetrischen zylinderförmigen Hohlraum mit einer Einschnürung 3. Dem Hohlraum wird über eine exzentrisch angeordnete radiusparallele Zuführung 4 eine fluide Strömung senkrecht zur Achse des zylinderförmigen Hohlraumes zugeführt. Die fluide Strömung S tritt somit tangential in den Hohlraum ein und erfährt dabei eine Ablenkung zur Achsenrichtung des Hohlraumes. Auf diese Weise erhält die Strömung S einen spiralförmigen Verlauf innerhalb des zylinderförmigen Hohlraums. In diesem Hohlraum ist axial ein Stößel 2 angebracht, der im vorliegenden Fall an der unteren Seite, also der der Drosselung zugewandten Seite mit einer Erweiterung versehen ist. Der Stößel 2 ist in Achsrichtung verschiebbar vorgesehen, so daß durch ein axiales Verschieben dieses Stößels eine Querschnittsverengung ähnlich eines Nadelventils bewirkt wird. Im Gegensatz zu einem normalen Nadelventil bewirkt jedoch die tangential eingeführte Strömung eine ausreichende Umspülung der Engstelle, so daß an dieser Stelle keine Verstopfungen durch in der Strömung mitgeführte Feststoffe entstehen können. Dies ist besonders vorteilhaft bei Stoffsuspensionsströmen in Papiermaschinen, bei der derartige Verstopfungen, also Faserwischbildungen, sehr ungünstige Auswirkungen auf die Qualität des produzierten Papiers haben können.Figure 1 shows a throttle device 1 according to the invention in cross section. In the schematic representation shown, the throttle device consists of an essentially rotationally symmetrical cylindrical cavity with a constriction 3. A fluid flow perpendicular to the axis of the cylindrical cavity is fed to the cavity via an eccentrically arranged radius-parallel feed 4. The fluid flow S thus enters the cavity tangentially and is thereby deflected to the axial direction of the cavity. In this way, the flow S receives a spiral course within the cylindrical cavity. A plunger 2 is axially mounted in this cavity, which in the present case is provided with an extension on the lower side, that is to say the side facing the throttling. The plunger 2 is slidably provided in the axial direction, so that by axially moving this plunger a cross-sectional constriction similar to one Needle valve is effected. In contrast to a normal needle valve, however, the tangentially introduced flow causes sufficient flushing around the narrow point, so that at this point no blockages can occur due to solids carried in the flow. This is particularly advantageous in the case of stock suspension flows in paper machines, in which such blockages, that is to say fiber wiping, can have very unfavorable effects on the quality of the paper produced.

Figur 2 zeigt den Schnitt A-A durch die Drosselvorrichtung aus Figur 1. In der gezeigten Draufsicht ist die oben beschriebene tangentiale Zuführung der Strömung S in den zylinderförmigen Innenraum der Drosselvorrichtung deutlich dargestellt.FIG. 2 shows the section A-A through the throttle device from FIG. 1. In the plan view shown, the above-described tangential feed of the flow S into the cylindrical interior of the throttle device is clearly shown.

Die Erfindung beschränkt sich naturgemäß nicht auf eine rein tangentiale Zuführung der Strömung in den Drosselraum einer Drosselvorrichtung. Es besteht auch die Möglichkeit, z.B. durch geeignete Kugelelemente die Richtung der zugeführten Strömung im gesamten Raumwinkel zu ändern, so daß einerseits ein Winkel ungleich 90° zur Hauptachse der Drosselvorrichtung eingenommen werden kann und gleichzeitig auch die Exzentrizität der Stoffströmung in Relation zur Achse der zylinderförmigen Drosselvorrichtung beeinflußt werden kann. Auf diese Weise ist eine einfache Beeinflussung des Steigungswinkels der rotierenden Strömungsspirale in der Drosselvorrichtung möglich, wodurch einerseits der Reinigungseffekt in gewünschtem Maße beeinflußt werden kann und andererseits auch eine zusätzliche Erhöhung oder Reduktion der Drosselung möglich ist, ohne daß die Durchtrittsfläche F mit Hilfe des Stößels 2 verändert werden muß.The invention is of course not limited to a purely tangential supply of the flow into the throttling space of a throttling device. There is also the possibility, e.g. by means of suitable spherical elements to change the direction of the supplied flow in the entire solid angle, so that on the one hand an angle unequal to 90 ° to the main axis of the throttle device can be taken and at the same time the eccentricity of the material flow in relation to the axis of the cylindrical throttle device can be influenced. In this way, a simple influencing of the pitch angle of the rotating flow spiral in the throttle device is possible, whereby on the one hand the cleaning effect can be influenced to the desired extent and on the other hand an additional increase or reduction of the throttling is possible without the passage area F using the plunger 2 must be changed.

Figur 3 zeigt die Anwendung des in Figur 1 und 2 gezeigten Ventiles am Beispiel der geregelten Zuführung von Verdünnungswasser in die Hauptströmung der Stoffsuspension in einen Stoffauflauf. Es sind zwei Querverteiler Q1 und Q2 dargestellt, wobei vom Querverteiler Q1 die Stoffsuspension in leicht erhöhter Konzentration über eine Hauptleitung H dem Stoffauflauf STA zugeführt wird. An der Hauptleitung H ist in einem Winkel ungleich 90° eine Zuführung von Verdünnungswasser in den Hauptstrom H gezeigt. Die Zuführung besteht im wesentlichen aus dem Drosselelement 1 selbst, wobei das Drosselelement die gleiche Ausführung wie das in der Figur 1 dargestellte Element besitzt und mit seiner Zuleitung direkt an den zweiten Querverteiler Q2, welcher das Verdünnungswasser führt, angeschlossen ist. Durch die richtige Wahl des Winkels zwischen der Hauptströmung H und der durch die Drosselvorrichtung zugeführten Nebenströmung N wird erreicht, daß unabhängig von der zugeführten Strömungsmenge des Nebenstromes N die Summe der zum Stoffauflauf geführten Suspensionsmenge konstant bleibt. Durch die Ausgestaltung der Drosselvorrichtung 1 wird jegliche Faserwischbildung in der Drosselvorrichtung vermieden, so daß keine Qualitätseinbußen beim hergestellten Papier zu befürchten sind. Die Drosselvorrichtung 1 wird dabei so betrieben, daß im normalen Betriebspunkt eine mittlere Menge Stoffsuspension durch die Drosselvorrichtung 1 geführt wird, wodurch keine Absetzvorgänge von Feststoffen in der Drosselvorrichtung möglich sind. Die Regelung der Stoffdichte, also der Konzentration der Gesamtsuspension aus den Strömen N und H, erfolgt dann um diesen mittleren Betriebspunkt, wobei die Summe des Gesamtstromes konstant bleibt und eine sehr feinfühlig dosierte Regelung der Konzentration durch die Bauart der Drosselvorrichtung 1 erreicht ist.FIG. 3 shows the application of the valve shown in FIGS. 1 and 2 using the example of the regulated supply of dilution water into the main flow of the stock suspension in a headbox. Two cross-distributors Q1 and Q2 are shown, the stock suspension being fed from the cross-distributor Q1 in a slightly increased concentration via a main line H to the headbox STA. A supply of dilution water into the main stream H is shown on the main line H at an angle unequal to 90 °. The feed consists essentially of the throttle element 1 itself, the throttle element having the same design as the element shown in FIG. 1 and with its feed line being connected directly to the second cross distributor Q2, which carries the dilution water. The correct choice of the angle between the main flow H and the secondary flow N supplied by the throttle device ensures that the sum of the suspension quantity led to the headbox remains constant irrespective of the flow quantity of the secondary flow N supplied. The design of the throttling device 1 avoids any fiber wiping in the throttling device, so that there is no fear of quality losses in the paper produced. The throttle device 1 is operated in such a way that an average amount of stock suspension is passed through the throttle device 1 at the normal operating point, as a result of which no settling processes of solids in the throttle device are possible. The regulation of the consistency, that is to say the concentration of the total suspension from the streams N and H, then takes place around this middle operating point, the sum of the total stream remaining constant and a very carefully metered control of the concentration being achieved by the design of the throttle device 1.

Claims (5)

Ventil- bzw. Drosselvorrichtung für eine fluide Strömung, insbesondere eine feststofführende Strömung, mit folgenden Merkmalen: 1.1 es ist ein im wesentlichen rotationssymmetrischer, flüssigkeitsdurchströmter Hohlkörper vorgesehen; 1.2 der Hohlkörper weist eine veränderbare, im wesentlichen rotationssymmetrische Durchtrittsfläche auf; 1.3 es ist eine Hauptströmungsrichtung im Hohlkörper vorgesehen, die im wesentlichen axial mit der Längsachse des Hohlkörpers verläuft;
gekennzeichnet durch folgendes Merkmal: 1.4 es ist eine Flüssigkeitszuführung zur Durchtrittsfläche derart vorgesehen, daß der Flüssigkeit bezogen auf die Hauptströmrichtung eine Rotationskomponente um die Hauptströmrichtung zugefügt ist. Valve or throttle device for a fluid flow, in particular a flow carrying solids, with the following features: 1.1 an essentially rotationally symmetrical hollow body through which liquid flows is provided; 1.2 the hollow body has a changeable, essentially rotationally symmetrical passage surface; 1.3 a main flow direction is provided in the hollow body, which runs essentially axially with the longitudinal axis of the hollow body;
characterized by the following feature: 1.4 a liquid supply to the passage surface is provided in such a way that a rotation component about the main flow direction is added to the liquid in relation to the main flow direction. Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, daß die Zuführung zur Ventilvorrichtung tangential in einen zylindrisch ausgebildeten Raum vorgesehen ist.Device according to claim 1, characterized in that the supply to the valve device is provided tangentially in a cylindrical space. Vorrichtung gemäß einem der Ansprüch 1 oder 2, dadurch gekennzeichnet, daß die fluidbenetzten Oberflächen des Ventils zumindest teilweise mit einer Struktur versehen sind, die eine Rotation der Flüssigkeit hervorruft.Device according to one of claims 1 or 2, characterized in that the fluid-wetted surfaces of the valve are at least partially provided with a structure which causes rotation of the liquid. Verfahren zur Reduktion der Verstopfungsneigung eines Ventils bzw. einer Drosselvorrichtung mit rotationssymmetrisch ausgebildetem Drosselquerschnitt, dadurch gekennzeichnet, daß der Flüssigkeit im Bereich des Drosselquerschnittes eine Rotationskomponente bezüglich der Hauptströmrichtung zugefügt wird.Method for reducing the tendency to clog a valve or a throttle device with a rotationally symmetrical throttle cross-section, characterized in that the liquid in the area a rotational component with respect to the main flow direction is added to the throttle cross section. Verwendung einer der Vorrichtungen gemäß Anspruch 1-3 in einer Stoffsuspensionszuführung zum Stoffauflauf einer Papiermaschine.Use of one of the devices according to claims 1-3 in a stock suspension feed for the headbox of a paper machine.
EP94109147A 1993-07-05 1994-06-15 Device and procedure for throtteling a fluidal pulp slurry without getting choked Expired - Lifetime EP0633416B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96118580A EP0766031B1 (en) 1993-07-05 1994-06-15 Device and procedure for throttling a fluid pulp slurry without getting choked

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4322321 1993-07-05
DE4322321 1993-07-05
DE4402516A DE4402516C2 (en) 1993-07-05 1994-01-28 Device and method for the non-clogging throttling of a fluid suspension flow
DE4402516 1994-01-28

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP96118580A Division EP0766031B1 (en) 1993-07-05 1994-06-15 Device and procedure for throttling a fluid pulp slurry without getting choked
EP96118580.8 Division-Into 1996-11-20

Publications (2)

Publication Number Publication Date
EP0633416A1 true EP0633416A1 (en) 1995-01-11
EP0633416B1 EP0633416B1 (en) 1997-08-27

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EP94109147A Expired - Lifetime EP0633416B1 (en) 1993-07-05 1994-06-15 Device and procedure for throtteling a fluidal pulp slurry without getting choked

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EP (1) EP0633416B1 (en)
JP (1) JP2995712B2 (en)
AT (2) ATE191266T1 (en)
CA (1) CA2127408C (en)
DE (1) DE9421889U1 (en)
FI (1) FI102779B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067460A1 (en) * 1998-06-23 1999-12-29 Gebr. Bellmer Gmbh & Co. Kg. Maschinenfabrik Suspension equalizer
CN101838949A (en) * 2009-03-20 2010-09-22 安德里茨库斯特斯有限责任公司 Be used to regulate the equipment on the paper machine of quantitative cross direction profiles
DE102010001557A1 (en) 2010-02-03 2011-08-04 Voith Patent GmbH, 89522 Valve for regulating a fluid flow
DE102010001555A1 (en) 2010-02-03 2011-08-04 Voith Patent GmbH, 89522 Valve for regulating a fluid flow
WO2011134682A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
WO2011134681A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
DE102010028403A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
CN103836206A (en) * 2014-02-20 2014-06-04 武汉汽轮发电机有限公司 Novel flow regulating valve for steam-turbine generator bearing

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Publication number Priority date Publication date Assignee Title
DE102004039712B4 (en) * 2004-08-17 2006-06-14 Voith Paper Patent Gmbh Reject flow control, from a used paper suspension sorting station, has a flow measurement point in front of a throttle linked to a control to set the delivery of a diluting fluid to prevent throttle blockages
DE202009002792U1 (en) 2009-02-27 2009-04-30 Voith Patent Gmbh Valve arrangement and distributor unit for distribution of volume flows
DE102010038891A1 (en) 2010-08-04 2012-02-09 Voith Patent Gmbh Headbox for machine to manufacture e.g. packaging paper web from fibrous material suspension, has partial flow lines arranged adjacent to secondary feed device and arranged non-adjacent to intermediate channel and/or fluid metering units

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JPS6469869A (en) * 1987-09-10 1989-03-15 Nippon Brown Coal Liquefaction Valve for slurry
JPH07111035B2 (en) * 1988-06-28 1995-11-29 日本製紙株式会社 Headbox for paper machine

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US3998244A (en) * 1975-08-08 1976-12-21 Clarence Bentley Drip irrigation valve with helical flow path

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067460A1 (en) * 1998-06-23 1999-12-29 Gebr. Bellmer Gmbh & Co. Kg. Maschinenfabrik Suspension equalizer
CN101838949A (en) * 2009-03-20 2010-09-22 安德里茨库斯特斯有限责任公司 Be used to regulate the equipment on the paper machine of quantitative cross direction profiles
EP2230353A1 (en) * 2009-03-20 2010-09-22 Andritz Küsters GmbH Assembly on paper machines for setting a surface weight cross-section
DE102010001557A1 (en) 2010-02-03 2011-08-04 Voith Patent GmbH, 89522 Valve for regulating a fluid flow
DE102010001555A1 (en) 2010-02-03 2011-08-04 Voith Patent GmbH, 89522 Valve for regulating a fluid flow
WO2011095250A1 (en) 2010-02-03 2011-08-11 Voith Patent Gmbh Valve for regulating a fluid flow
WO2011095251A1 (en) 2010-02-03 2011-08-11 Voith Patent Gmbh Valve for regulating a fluid flow
WO2011134682A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
WO2011134681A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
DE102010028403A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
WO2011134683A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
DE102010028408A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
DE102010028404A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
CN103836206A (en) * 2014-02-20 2014-06-04 武汉汽轮发电机有限公司 Novel flow regulating valve for steam-turbine generator bearing

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ATE191266T1 (en) 2000-04-15
DE9421889U1 (en) 1997-02-27
JP2995712B2 (en) 1999-12-27
EP0633416B1 (en) 1997-08-27
FI943199A0 (en) 1994-07-04
CA2127408A1 (en) 1995-01-06
CA2127408C (en) 2001-09-18
ATE157434T1 (en) 1997-09-15
FI102779B1 (en) 1999-02-15
FI943199A (en) 1995-01-06
JPH0881891A (en) 1996-03-26
FI102779B (en) 1999-02-15

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