EP1518019A1 - Dispositif pour modifier et/ou controler un profil de pression - Google Patents

Dispositif pour modifier et/ou controler un profil de pression

Info

Publication number
EP1518019A1
EP1518019A1 EP03760699A EP03760699A EP1518019A1 EP 1518019 A1 EP1518019 A1 EP 1518019A1 EP 03760699 A EP03760699 A EP 03760699A EP 03760699 A EP03760699 A EP 03760699A EP 1518019 A1 EP1518019 A1 EP 1518019A1
Authority
EP
European Patent Office
Prior art keywords
press
pressure profile
profiling unit
shoe
web
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Withdrawn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
EP03760699A
Other languages
German (de)
English (en)
Inventor
Gerd Komposch
Jens Müller
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
Priority claimed from DE20218393U external-priority patent/DE20218393U1/de
Priority claimed from DE10260202A external-priority patent/DE10260202A1/de
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1518019A1 publication Critical patent/EP1518019A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses

Definitions

  • the invention relates to a method and a device for influencing and / or monitoring the elongated press nip in the web running direction and / or transverse direction resulting in the treatment of a material web.
  • Pressing devices with means for influencing the pressing pressure profile are known for example from the publications DE 196 17 801 A, 197 14 939 A, DE 44 23 694 C2 and EP 0 345 501 B2.
  • the invention has for its object to provide an improved method and an improved device of the type mentioned.
  • the method and the device should be as largely automated as possible.
  • this object is achieved by a method for influencing and / or monitoring the elongated press nip in the web running direction and / or transverse direction, which is used in the treatment of a material web, in which state data of a profiling unit serving to adjust the press pressure profile is related to a respective profiling unit Pressing profile resulting in the relevant state of the profiling unit is stored in a data memory and the stored state data can be called up again for the targeted application of the profiling unit. Due to this training, extensive automation or even more reliable control and / or regulation of the relevant processes is possible.
  • the relevant status data of the profiling unit are stored in the data memory for several different pressing pressure profiles.
  • the status data of the profiling unit assigned to it can be called up from the data memory and the profiling unit can be loaded accordingly.
  • a respective predeterminable pressing pressure profile is set by varying the loading of the profiling unit, and the resultant status data of the profiling unit are stored in the data memory in relation to the respective predeterminable pressing pressure profile.
  • Status data of the profiling unit in relation to a respective pressing pressure profile that results during operation and / or under dynamic conditions are preferably stored in the data memory.
  • state data of the profiling unit are stored in the data memory in relation to a respective pressing pressure profile adapted to optimize at least one material web property to the respective production conditions.
  • Pressure profile control and / or regulation is preferably carried out.
  • the data memory can, for example, be assigned to the relevant control and / or regulating device or be part of this device.
  • the pressing pressure profile is expediently measured in particular for such a pressure profile control and / or regulation and / or for pressure profile monitoring. This pressure profile is preferably measured during operation and / or under dynamic conditions.
  • the pressing pressure profile which results in a particular predefinable state of the profiling unit is measured and monitored for changes in relation to a predefinable standard.
  • a pressing pressure profile resulting during the operation of the pressing unit in question is preferably monitored accordingly.
  • fault diagnosis can be related, for example, to the state of at least one endless belt, in particular felt belt and / or the like, which is guided through the press nip, ie the state of a felt in question can be monitored indirectly, for example. For example, it can be recognized in good time when the respective felt needs to be replaced.
  • the material web can be, for example, a fibrous web and in particular a paper, cardboard or tissue web.
  • the press nip in question can serve, for example, for dewatering and / or calendering the material or fiber web.
  • a method for monitoring the extended pressure nip in the web running direction and / or transverse direction resulting in the treatment of a material web is also specified, which is characterized in that the pressure profile is measured in the nip.
  • the object specified at the outset is also achieved according to the invention by a device for influencing and / or monitoring the extended press nip in the web running direction and / or transverse direction resulting in the treatment of a material web, with a measuring device for measuring the press pressure profile, a profiling unit serving to adjust the press pressure profile and a data memory for storing status data of the profiling unit in relation to a respective pressure profile which results in a relevant status of the profiling unit.
  • the invention also provides a device for monitoring the extended press nip in the web running direction and / or transverse direction resulting in the treatment of a material web, in particular according to claim 19, with a measuring device for measuring the press ness profile in the press nip.
  • the data memory can, for example, be assigned to a control and / or regulating unit for controlling or regulating the pressure profile or for profile monitoring, or can be part of this unit.
  • a press shoe which is wrapped by a press belt is provided on at least one side of the press nip and is provided with pressure measuring holes associated with the measuring device and opening into the area between the press shoe and the press belt for measuring the press pressure profile.
  • the press belt can in particular be formed by a flexible press belt or a flexible roll jacket.
  • the measuring device expediently comprises at least one pressure sensor, which in particular in a press shoe, a press jacket, a press unit opposite a shoe press unit, such as e.g. a counter roller, a covering, in particular a felt, and / or the like is arranged.
  • the profiling unit comprises at least one press shoe which is wrapped in a press belt and which can be adjusted at least in the web running direction in order to set the press pressure profile.
  • At least one displacement sensor can be provided to determine the respective press shoe position.
  • the relevant status data to be stored in the data memory can then correspond, for example, to the respective press shoe positions.
  • the press shoe can be sectioned when viewed in the transverse direction.
  • the press shoe viewed in the transverse direction, can be acted upon section by section in the web running direction, wherein a plurality of press pressure profiles resulting in the web running direction can be set at the same time by appropriately loading the press shoe.
  • the status data to be stored in the data memory can again correspond to the relevant settings in the present case.
  • a circumferential press belt is provided on at least one side of the press nip and can be acted upon by at least two separately controllable pressing elements arranged one behind the other in the web running direction, via which the pressing pressure profile can be influenced accordingly.
  • At least one press shoe is preferably again provided between the press belt and the support elements.
  • the press belt can in particular be flexible again.
  • the status data to be stored in the data memory can in particular also be representative of the respective application of the pressing elements.
  • the press unit in question can in particular be designed as described in EP 0 345 501 B2, which is hereby incorporated by reference into the present disclosure.
  • the profiling unit comprises at least one press shoe arranged on one side of the press nip and means for changing the contour of the press shoe which results in the web running direction and / or in the transverse direction.
  • the shoe body preferably has at least one chamber which can be pressurized and / or heated and / or cooled in order to change the shoe contour accordingly.
  • the state data to be stored in the data memory can be representative of the respective state of the relevant means that change the shoe contour.
  • the profiling unit can in particular also comprise at least one press shoe which is arranged on one side of the press nip and can be acted upon by at least one support or pressing element which can be displaced in the web running direction and / or transverse direction.
  • any combinations of the various embodiments are also conceivable.
  • a press shoe can be used that is both adjustable and its contour can be changed, etc.
  • the device according to the invention serves in particular to carry out the method according to the invention.
  • it can again be used for dewatering and / or calendering the material or fiber web.
  • a particular predefinable state of the profiling unit that is to say, for example, of the press shoe and / or support or pressing element arrangement, can in particular also be set again via the respective stored status data, which in particular also makes it possible to monitor the press pressure profile for possible changes.
  • the device comprises a control and / or regulating unit
  • the data memory can in particular be assigned to this unit again or can be part of this unit.
  • An error detected during the monitoring of the pressure profile can be signaled optically and / or acoustically.
  • the machine in question is automatically switched off, which can be done again, for example, via the control and / or regulating unit in question.
  • FIG. 1 shows a schematic, partially sectioned illustration of a device for influencing and / or monitoring a pressing pressure profile that results in the web running direction
  • Figure 2 is a schematic plan view of part of the device of Figure 1, and
  • FIG. 3 shows a diagram in which, purely by way of example, three different longitudinal press pressure profiles that result from correspondingly different press shoe positions are shown.
  • FIGS. 1 and 2 show a schematic illustration of an exemplary embodiment of a device 10 for influencing the elongated press nip 12 in the web running direction L which is used in the treatment of a material web.
  • the material web can in particular be a paper, cardboard or tissue web.
  • the device 10 comprises at least one press shoe 14 which is arranged on one side of the press nip 12 and can be adjusted in the web running direction L.
  • the press shoe 14 is wrapped in a press belt 16, which in particular can be the press jacket of a so-called shoe press roll.
  • the pressure shoe 12 is acted upon by at least one pressure element 18 in the direction of a counter surface 20.
  • the press nip 12 is therefore provided between the press belt 16 and the counter surface 20, which can be formed, for example, by a counter roller 22.
  • the press shoe 14 can in particular be infinitely adjustable in the web running direction L.
  • the profiling unit used for setting the pressure profile therefore includes in particular the pressure shoe 14 and the at least one pressure element 18.
  • the device 10 also includes a data memory 23 for storing status data of the profiling unit 14, 18 in relation to a respective pressure profile that results in a relevant state of the profiling unit 14, 18.
  • At least one adjustable wedge rod 24 is provided, which extends generally transversely to the web running direction L and, viewed in the web running direction L, is arranged behind the press shoe 14.
  • the press shoe 14 is urged against the wedge rod 24 in the web running direction L due to the friction occurring between it and the rotating press belt 16.
  • the press shoe 14 be provided with at least one stop 26, via which it rests on this wedge bar 24.
  • the press shoe 14 is constantly in contact with the wedge bar 24, so that a respective shoe adjustment in the web running direction L is possible at any time.
  • the wedge rod 24 can be adjusted in the direction of its longitudinal axis, here in a direction transverse to the web running direction L.
  • a drivable spindle 28 can be provided, for example, to adjust the wedge rod 24.
  • the spindle 28 can be driven, for example, by a hydraulic motor 30 or the like.
  • the partial rod 24 is mounted on a support body 32, on which the pressing elements 18 which act on the press shoe 14 in the direction of the counter surface 20 and which can be cylinder / piston units, for example (cf. in particular FIG. 1), are also supported are.
  • the wedge rod 24 is fixed in the web running direction L by stops 34 provided on the support body 32. In addition, the wedge rod 24 can be guided through these stops 34 during a respective adjustment in the transverse direction.
  • the wedge rod 24 has at least one wedge surface 38, which cooperates with a wedge surface 40 of a stop 26 assigned to the press shoe 14 in such a way that with a respective adjustment of the wedge rod 24 in the transverse direction, the press shoe 14 in the web running direction L is shifted accordingly.
  • Several such wedge surfaces 38 can in particular be provided on the wedge rod 24. can be seen, each of these wedge surfaces 38 cooperating with a stop 26 assigned to the press shoe 14.
  • a wedge rod 24 that extends at least substantially over the entire width of the press shoe can be provided.
  • wedge bars 24 each extending generally in the transverse direction. Viewed in the transverse direction, these can be arranged next to one another in a line, for example.
  • a respective wedge rod 24 can cooperate with one or more stops 26 assigned to the press shoe 14.
  • the various wedge bars can be driven at least partially separately.
  • the driving force is transmitted from the spindle 28 to the wedge rod 24 via a movement thread 36.
  • this movement thread 36 can be designed and the wedge angle selected such that, in the absence of a drive, a respective wedge bar setting and correspondingly a respective shoe setting is secured by self-locking.
  • the current position of the press shoe 14 is measured via one or more displacement transducers 42 (see FIG. 1).
  • measured values obtained via this displacement transducer 42 can be stored in the data memory 23 as status data and called up again in order to act on the profiling unit 14, 18 in a targeted manner.
  • the adjustment of the press shoe 14 can be controlled and / or regulated, for example, from outside the shoe press, the stored status data in particular being able to be used.
  • the press shoe 14 can in particular be set in the desired manner via a control and / or regulating device 44, by using, for example, the status data stored in the data memory 23.
  • the data memory 23 can be assigned to the control and / or regulating unit 44 or can be part of this unit 44.
  • the displacement sensor 42 can be connected to the data memory 23 or the control and / or regulating device 44.
  • the respective actual position of the press shoe 14 can be compared in this control and / or regulating device 44, for example, with a respective target value in order to achieve an adaptation to this target value. In this case too, the status data stored in the data memory 23 can be accessed again.
  • the press shoe 14 can be provided with pressure measurement bores 46 opening into the area between the press shoe 14 and the press belt 16 in order to measure the pressure profile resulting in the web running direction L. As can be seen from FIG. 2, a plurality of such pressure measuring bores can be arranged one behind the other in the web running direction L.
  • a respective predeterminable pressing pressure profile can now be set, for example.
  • the resulting state data of the profiling unit 14, 18 can then be stored in the data memory 23 in relation to the respective predeterminable pressing pressure profile.
  • status data of the profiling unit 14, 18 relating to a respective pressing pressure profile that results during operation and / or under dynamic conditions are preferably stored in the data memory 23.
  • status data of the profiling unit 14, 18 can also be stored in the data memory 23 in relation to a respective pressing pressure profile adapted to the optimization of at least one material web property to the respective production conditions become.
  • it can also be stored on press pressure profiles for different operating phases, such as the start-up of the machine in question, in particular the paper machine, its commissioning and / or the like.
  • At least one setpoint pressure profile can expediently be specified via the control and / or regulating device 44.
  • the status data stored in the data memory 23 can in particular be used again.
  • the profiling unit 14, 18 is thus acted upon in accordance with the status data called up, for example in order to obtain a respective presetting. If necessary, a fine adjustment can then be made.
  • the device 10 prefferably be designed in such a way that the press pressure profile resulting in the web running direction L can be controlled and / or regulated by means of a corresponding adjustment of the press shoe 14, for which purpose in particular the respective stored status data can also be used.
  • monitoring of the pressing pressure profile is also possible, in which the pressing pressure profile resulting when the profiling unit can be predetermined is measured and monitored for changes, for example in relation to a predetermined standard.
  • the relevant state of the profiling unit 14, 18 can in particular be restored by calling up the relevant state data from the data memory 23 and applying the profiling unit 14, 18 accordingly.
  • the pressing pressure profile resulting during the operation of the device 10 is preferably monitored again accordingly.
  • an error diagnosis related to the pressing unit or parts thereof can be carried out.
  • Such a fault diagnosis can be related, for example, to the state of at least one endless belt, for example a felt belt and / or the like, which is guided through the press nip 12. For example, it can be determined in good time when a felt in question needs to be replaced. This can also be signaled acoustically and / or optically, for example.
  • the press shoe 14, viewed in the transverse direction, can be continuous or sectioned.
  • a plurality of stops 26 assigned to the press shoe 14 are individually controlled via a plurality of drives, for example each formed by a hydraulic motor 30, then different pressure profiles can also be set at the same time, for example in order to correspondingly improve the moisture cross profile. These settings can also be made again in particular on the basis of status data of the profiling unit 14, 18 stored in the data memory 23.
  • the maximum pressure of the pressure profile above each pressure element 18 can be measured via pressure measuring holes 48 provided in the pressure shoe 14 (see FIG. 2 again). Since the pressure profile resulting in the web running direction L is measured at one or more points, the pressure profile at each pressure element 18 can be determined on the basis of the maximum pressure. Corresponding status data can again be stored in the data memory 23 for this purpose.
  • the setting of the pressing pressure profile resulting in the web running direction L can take place, for example, as a function of certain operating conditions such as, for example, the respective type of felt, the respective type of paper and / or the like. For this purpose too, the relevant status data can be stored again in the data memory 23.
  • the pressing pressure cross profile can be controlled and / or regulated in the respectively desired manner, in particular via the various pressing elements 18.
  • Corresponding status data of the profiling unit 14, 18 can also be stored in the data memory 23 for this purpose.
  • the press belt 18 or the press shoe 14 can, for example, also be acted upon by at least two separately controllable pressing elements 18 arranged one behind the other in the web running direction L, in order to influence the pressing pressure profile accordingly.
  • Such an embodiment is also conceivable, for example, in which one or more pressing elements 18 can be displaced in particular in the case of a positionally stable pressing shoe 14, for example in the web running direction L and / or in the transverse direction.
  • corresponding status data of the profiling unit 14, 18 can be stored again in the data memory 23 in order to be called up later for a corresponding application to the profiling unit 14, 18.
  • FIG. 3 shows a diagram in which, purely by way of example, three different longitudinal press pressure profiles, which result from correspondingly different press shoe positions, are shown.
  • the pressures given in “MPa” are plotted over the distance x given in "millimeters" in the web running direction from a reference point. How On the basis of the curves A - C that apply to three different shoe settings, shoe setting A results in a higher maximum pressure value than shoe setting B, and shoe setting B again a higher maximum pressure value than shoe setting C.
  • the pressure profiles shown in the diagram can, for example, be provided for three different products and, in particular, can be predetermined at least essentially by status data for the profiling unit in question, which are stored in the data memory.
  • the curves in question can be generated by moving the press shoe 14 in the web running direction L.

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

La présente invention concerne un procédé pour modifier et/ou contrôler le profil de pression apparaissant dans un interstice de compression allongé qui sert à traiter une bande de matière, dans la direction d'avance de la bande et/ou en direction transversale. Ce procédé consiste à enregistrer dans une mémoire des données d'état d'une unité d'établissement de profil servant à régler un profil de pression, relatives à un profil de pression apparaissant avec un état concerné de l'unité d'établissement de profil, puis à extraire à nouveau les données d'état enregistrées afin d'alimenter de manière ciblée l'unité d'établissement de profil. La présente invention concerne également un dispositif correspondant.
EP03760699A 2002-06-25 2003-05-28 Dispositif pour modifier et/ou controler un profil de pression Withdrawn EP1518019A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE20218393U 2002-06-25
DE20218393U DE20218393U1 (de) 2002-06-25 2002-06-25 Vorrichtung zur Beeinflussung eines Pressdruckprofils
DE10260202A DE10260202A1 (de) 2002-06-25 2002-12-20 Vorrichtung zur Beeinflussung und/oder Überwachung eines Druckprofils
DE10260202 2002-12-20
PCT/EP2003/050204 WO2004001124A1 (fr) 2002-06-25 2003-05-28 Dispositif pour modifier et/ou controler un profil de pression

Publications (1)

Publication Number Publication Date
EP1518019A1 true EP1518019A1 (fr) 2005-03-30

Family

ID=30001519

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03760699A Withdrawn EP1518019A1 (fr) 2002-06-25 2003-05-28 Dispositif pour modifier et/ou controler un profil de pression

Country Status (4)

Country Link
EP (1) EP1518019A1 (fr)
AU (1) AU2003250233A1 (fr)
BR (1) BR0312215B1 (fr)
WO (1) WO2004001124A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI76872C (fi) * 1987-02-23 1988-12-12 Valmet Paper Machinery Inc Foerfarande och anordning foer styrning av zonvals.
DE4409316C1 (de) * 1994-03-18 1995-06-29 Escher Wyss Gmbh Langspaltpressvorrichtung zur Behandlung einer Faserstoffbahn
DE19631638A1 (de) * 1996-08-05 1998-02-12 Voith Sulzer Papiermasch Gmbh Pressenanordnung
DE19642047A1 (de) * 1996-10-11 1998-04-16 Voith Sulzer Papiermasch Gmbh Preßeinheit
EP1361950A1 (fr) * 2001-02-22 2003-11-19 Metso Paper, Inc. Procede et systeme de mesure pour la fabrication de papier et de carton
FI116228B (fi) * 2001-07-05 2005-10-14 Vaahto Oy Menetelmä pitkänippipuristimen kuormituskengän asennon ohjaamiseksi ja pitkänippipuristin
DE10228308A1 (de) * 2002-06-25 2004-01-22 Voith Paper Patent Gmbh Vorrichtung und Verfahren zur Beeinflussung eines Pressdruckprofils

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004001124A1 *

Also Published As

Publication number Publication date
AU2003250233A1 (en) 2004-01-06
WO2004001124A1 (fr) 2003-12-31
WO2004001124A8 (fr) 2005-03-17
BR0312215B1 (pt) 2013-08-27
BR0312215A (pt) 2005-04-12

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