EP1548183A1 - Presse à pince allongée pour traiter un matériau en bande - Google Patents

Presse à pince allongée pour traiter un matériau en bande Download PDF

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Publication number
EP1548183A1
EP1548183A1 EP04030500A EP04030500A EP1548183A1 EP 1548183 A1 EP1548183 A1 EP 1548183A1 EP 04030500 A EP04030500 A EP 04030500A EP 04030500 A EP04030500 A EP 04030500A EP 1548183 A1 EP1548183 A1 EP 1548183A1
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EP
European Patent Office
Prior art keywords
press
pressure
hydraulic
shoe
valves
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
EP04030500A
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German (de)
English (en)
Other versions
EP1548183B1 (fr
Inventor
Peter Helfer
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.)
Helfer Peter
Original Assignee
MD Papier GmbH and Co KG
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Filing date
Publication date
Application filed by MD Papier GmbH and Co KG filed Critical MD Papier GmbH and Co KG
Publication of EP1548183A1 publication Critical patent/EP1548183A1/fr
Application granted granted Critical
Publication of EP1548183B1 publication Critical patent/EP1548183B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • D21F3/06—Means for regulating the pressure

Definitions

  • the present invention relates to a Breitnippresse, in particular a Shoe press for the treatment of a material web.
  • Such presses are used among others for drainage of Paper webs are used and usually consist of at least one Pressing device having a predetermined range through which the Paper web is performed.
  • the drainage of the paper web is among others of the dewatering force of the pressing device dependent, which also by the Design of the press device and the operating parameters such as the pressing pressure is determined.
  • the open press closed and then charged. To stop operating the press will be in relieved in reverse order and then opened.
  • Critical conditions on a paper machine or a press section can For example, occur because due to production disruptions the Material web is no longer properly guided by the paper machine and due to paper accumulation before by the pressing device and the Counter roll formed press nip form material collections, which lead to a partial damage to the clothing and possibly subsequent to one lead to immediate or delayed destruction of the clothing.
  • the present invention is based on a Breitnippresse, in particular a Shoe press described for the press section of a paper machine; it is however noted that such a press also in other areas of Papermaking such as used in satinizing papers or other industries for the treatment of elongated webs is used.
  • the present invention has the object, known in the art To improve problems and in particular the opening and closing or the To improve the loading and unloading of a nip press.
  • the broad-nip press according to the invention in particular the inventive Shoe press for the treatment of a material web, has at least one Counter roller and at least one pressing device on, with a flexible, is wrapped around movable jacket.
  • This jacket essentially wraps around the Scope of the pressing device and is on the front pages by appropriate side covers closed.
  • the pressing device itself has at least one support element on which at least one press shoe is arranged, which by means of a pressure device, which is connected to a hydraulic system, in at least one predetermined Direction, preferably the orthogonal direction, based on the counter roll moves can be.
  • the device is further characterized in that a Control device is provided, through which at least one valve device, which discharges the hydraulic fluid of the hydraulic system via a discharge pipe, is controlled.
  • a shoe press here is a pressing systems understood that at least one Counter roll and has at least one pressing device.
  • the generated pressing force is not just a narrow between the two elements, that is line-like area of the two surfaces is limited, but is over a given surface applied between the two surfaces.
  • the Distance between the two surfaces with respect to the direction of rotation is not necessarily constant, but may depend on a given Pressure profiles vary, i. be adjusted.
  • hydraulic system in the context of the present invention of hydraulic fluid at least partially flowed through components and components, such as Valves, pipelines, flow paths, throttles and the like understood.
  • the press shoe which is moved and / or loaded substantially orthogonal to the counter-roller constructed multi-limbed.
  • a multi-memberedness becomes, for example, thereby achieved that the press shoe before or during assembly in the press device several individual components, in particular in its width over the material web, is constructed of several individual components. These are merging in style, that a uniform treatment of the material web over its entire width, in particular without substantially sudden changes in the pressing pressure he follows.
  • the hydraulic fluid is preferably flows in the hydraulic system of the pressing device, a hydraulic oil, which at least a predetermined viscosity and a predetermined composition having.
  • a hydraulic oil which at least a predetermined viscosity and a predetermined composition having.
  • Such oils are for example synthetic hydraulic oils due to their lubricating properties and viscosity both a sufficient load for the impression cylinder in the printing device, as well as one for the storage of the Mantels advantageous film formation between the outer contour of the press shoe and provide the inner contour of the shell.
  • the press shoe has a plurality of pressure devices, which are preferably in a predetermined number of groups are summarized, respectively associated with at least one predetermined area of the press shoe. So for example, a group having at least one printing device, the drive-side edge, the driver-side edge and / or the middle region of the Press shoe and thus be associated with the material web width.
  • each group is at least a hydraulic system and at least one control device with at least a valve device controlled and / or regulated.
  • the valve device comprises at least one valve from a group of valves on, which has two-way valves, three-way and / or multi-way valves, which for example as electronic valves, mechanical valves, pneumatic valves, Solenoid valves, ball valves and combinations thereof and the like are executed.
  • valve device or the valve means are in the flow path of the hydraulic fluid between the Pressure control device of the pressing device and the printing device arranged.
  • a pressure control device is understood in this case a device which the hydraulic conditions in the hydraulic system, in particular the pressure device during operation of the press according to predetermined parameters controls and / or regulated.
  • Hydraulic conditions will include the flow rate and the pressure understood the hydraulic fluid.
  • valve device for discharging the hydraulic fluid can also be integrated in the pressure control device.
  • the hydraulic Diameter of the derivative and / or the valve device greater than that Hydraulic diameter of the hydraulic line between the pressure control device and the pressure device of the press shoe. It is also in the spirit of the present Invention, the hydraulic diameter of the derivative and / or the Valve device to be chosen so that the hydraulic resistance of the fluid at Opening the valve device - and the associated deriving the hydraulic fluid - is as low as possible.
  • Valve device at a predetermined distance, preferably as close as possible in Flow path of the hydraulic fluid to the pressure device of the press shoe, arranged.
  • the hydraulic fluid from the hydraulic system of the pressure device in particular actively discharged via the derivative, with auxiliary systems, such as Pumps, vacuum containers or the like for accelerated discharge of Hydraulic fluid can be used from the hydraulic system.
  • auxiliary systems such as Pumps, vacuum containers or the like for accelerated discharge of Hydraulic fluid
  • control device is according to a particularly preferred embodiment by means of at least one control unit, in particular an electronic Control unit switched depending on various control variables.
  • control variables are preferably selected from a group of variables, which directly or indirectly issued signals from mechanical, electronic, manual and / or automatic switches, such as emergency switches to Lifting the press, emergency switches of the press and / or the paper machine, Vibration sensors on the press, for example in the area of the Support element of the press shoe and / or the paper machine, Position sensors, such as the position sensors of felts, Pressure sensors, such as for the internal jacket pressure of the pressing device, optical sensors, web sensors, such as edge paddles after the Randspritzern and combinations thereof and the like.
  • a Control unit by means of a Control unit several presses or pressing systems, in particular shoe presses, be controlled according to a predetermined algorithm.
  • a predetermined algorithm for example, in a critical Production situation on a paper machine the order of discharge of the different presses in this algorithm is considered to be one possible damage or consequential damage to the press and downstream Keep components of a paper machine low.
  • This can be, among other things done by; that, for example, in the event of damage to the First press first, the following presses or pressing systems at least be relieved or opened before the first press relieved itself or opened becomes.
  • each pressing device is at least one Assigned control device.
  • the control devices are in a particularly preferred embodiment via a BUS system for the transmission of control signals between the Control devices and / or between the control unit and at least one Control device connected to each other, wherein in a particularly preferred Embodiment, the BUS system is designed as a ring-BUS system.
  • the separation or the discharge of the press shoe from the counter roll takes place according to a preferred embodiment of the present invention in one given time, between 0.001 s and 120 s, preferably between 0.01 s and 60 s and more preferably between 0.1 s and 20 s and in particular less than 10 s.
  • the Press shoe next to a hydraulic pressure device at least one mechanical, in particular a spring-based restoring device, which according to a particularly preferred embodiment in relief of Hydraulic pressure device of the press shoe of the counter roll of Press device lifts off.
  • a spring-based restoring device which according to a particularly preferred embodiment in relief of Hydraulic pressure device of the press shoe of the counter roll of Press device lifts off.
  • the arrangement of the pressing device or in particular of the press shoe is determined by a suitable choice of Spring characteristics of the reset means the reaction time of the system, the means the time for the lifting of the press shoe is influenced.
  • the derivative takes place the hydraulic fluid from the hydraulic system in the way that a residual pressure the hydraulic fluid in the pressure device after the separation or discharge of the press shoe remains from the counter roll, which is between 0 bar and 100 bar, preferably between 0 bar and 10 bar and more preferably between 0 bar and 1 bar, in particular at about 0.5 bar. It is also in the spirit of the present Invention, that the residual pressure of the hydraulic system of the pressing device in Dependence of the used reset systems for the pressure shoe, like for example, of the springs and in particular their spring constants, is given.
  • the object of the present invention is further achieved by a method for controlling a press, in particular a shoe press for treating a material web solved, which has a multi-stage process flow.
  • At least one signal is lifted off or relieving the press generated, such a signal preferably a Control is, for example, by mechanical, electronic, manual and / or automatic switches, sensors, such as vibration sensors, Position sensors, pressure sensors, optical sensors, combinations thereof and the like is generated.
  • Such a signal is preferably in an electronic control device, preferred by a variety of electronic control devices and particularly preferably of electronic control devices with at least one higher-level control unit, such as a master controller processed and used to control the press device.
  • Another step of the method according to the invention is the opening of the Valve device or the valve devices which in the hydraulic system of Pressing device, in particular the printing device, are arranged.
  • the method is further characterized by the step of relieving or lifting the Pressing device, in particular of the press shoe of the counter roll characterized.
  • the lifting or the discharge of the press shoe takes place preferably in a predetermined time interval.
  • This time interval is according to a particularly preferred embodiment between 0.001 s and 120 s, preferably between 0.01 s and 60 s and more preferably between 0.1 s and 20 s and in particular less than 10 s.
  • the method is characterized characterized in that this is done with a device which at least one Mating roll and at least one, with a flexible, rotatable mantle has embraced pressing device.
  • the press facility has one on at least one support element arranged press shoe and at least one Pressure device which is connected to a hydraulic system and the Press shoe in at least one predetermined direction, based on the Counter roll moves, the hydraulic system of the printing device at least a control device which a hydraulic fluid via a Discharge pipe out of the hydraulic system.
  • the invention also extends to the use of the invention Device and / or the method according to the invention in a paper machine, in particular in a paper machine with at least one pressing device, in particular a shoe press, which in particular during critical Production conditions on the paper machine, in the press section and / or in the Production path from upstream production stages for the production of a Material web such as a paper web. Lifted and / or relieved becomes.
  • Fig. 1 is a schematic one possible press configuration for a Breitnippresse shown with a press nip, which a press roll 1, such as a Nipcoflex® roll of Voith GmbH & Co. KG, and over Connecting elements 5 is non-positively connected to the counter-roller 2.
  • the Press roll 1 has a jacket 7, which in particular by a predetermined internal pressure, as generated for example by compressed air, in a predetermined shape is held. For example, this pressure is approx. 0.35 bar.
  • Between the surface of the shell 7 and the surface of the Counter roller 2 is according to the embodiment shown here at least one felt 4 and in production a paper web 3 with a predetermined consistency, arranged.
  • the counter roll rotates according to the arrow 6 counterclockwise, so that the paper web according to the arrow 8 and the felt from the nip of Press roll and the counter roll are performed.
  • Fig. 2 shows a detailed view of the press arrangement according to FIG. 1 in section.
  • this press shoe is single-membered executed.
  • the pressure device is connected via a hydraulic line 20 with the Hydraulic system of the pressure device fluidly connected.
  • the press shoe on the jacket 7, the Felt 4 and the paper web 3 is pressed against the surface of the backing roll 2. Furthermore, the trajectory for the paper, the felt and the flexible sheath of the Roller indicated.
  • Fig. 3 shows the press device of the press roll 1 in longitudinal section, in addition to the press shoe 21, the pressure means which the leader side 33 a and the Drive side 33b and the central region 33a are assigned, are shown. Also are shown in Fig. 3, the springs 31, which within the support element 24th are arranged and according to the example shown here in relieving the Pressure devices lift the press shoe 21 from the backing roll 2 upwards.
  • the jacket 7 is shown in FIG. 3 as a dotted line, which in the Side panel 34 is recorded both drive and driver side.
  • the pressure devices are via the hydraulic lines 20a, b, c with the other Components of the hydraulic system of the pressing device connected according to In the embodiment shown here, both the driver-side printing device 33a and the drive-side pressure device 33b and the central region of the Pressure devices each separated from each other via the hydraulic lines 20a, 20b and 20c are controlled.
  • the pressure devices of the center region are hydraulically connected in parallel and / or serially via a connecting line.
  • the middle range can be divided into several groups, whereby also the drive and driver side edge region have more than one printing device can. Also, the drive and driver side edge area can be summarized become.
  • the derivation of the hydraulic oil from the shell interior is preferably carried out over a discharge device, not shown, which, for example, at least one Abgradö réelle on the rear and / or front of the press shoe (with respect to the Direction of rotation of the jacket) with a predetermined distance to the press cover and to the press shoe.
  • Fig. 4 shows the schematic arrangement of a device according to the invention for Controlling a press with three arranged separately Hydraulic systems for the printing device 33a, 33b and 33c.
  • the hydraulic systems are connected via the pipe 43 to a supply system, which According to the embodiment shown here, a hydraulic fluid with a predetermined pressure to the proportional valves 40a, 40b and 40c leads. These control the given pressure of the respective zone, as well as the Pressure increase or the pressure reduction during loading and unloading of the press.
  • a main valve 42 is arranged, which according to the here illustrated embodiment is a 4/2-way valve. About this valve 42 is the pump pressure of the hydraulic fluid for the load and the closing of the Press released to the valves 40a, 40b and 40c.
  • When unloading is the System via this valve and a line connected thereto (not shown) emptied into a hydraulic container.
  • This is a simplified part of the flowable ingredient pressed out of the paper web and over the felt from the Brought out press.
  • This flowable ingredient consists mainly of water and, depending on the paper composition, in addition to fiber constituents, fillers, Aid shares, etc on.
  • the pressure can be adjusted accordingly predetermined ramps for loading and unloading at different speeds or after predefined functions are built or dismantled.
  • the lines for the corresponding pressure devices are according to the here illustrated embodiment the respective required mass flows of the Hydraulic oil adapted.
  • the hydraulic lines of the respective hydraulic systems 20a, 20b and 20c are according to the embodiment shown here Derivatives and other valves 41 a, 41 b and 41 c arranged.
  • the derivatives are connected via T-pipe pieces with the lines 20a, 20b and 20c and lead to the valves 40 a, 41 b and 41 c, the hydraulic oil to corresponding oil collection points of the hydraulic system.
  • the hydraulic diameters of the discharges are preferably larger or at least the same size as the hydraulic diameter the lines 20a, 20b and 20c.
  • Valves 41 a, 41 b and 41 c are in the flow direction of the Valves 41 a, 41 b and 41 c arranged throttles, which a predetermined Maintaining residual pressure in the hydraulic system.
  • valves 41 a, 41 b and 41 c 2/2-way valves whose hydraulic characteristics, for example, a maximum pressure of 280 bar and a maximum flow rate of 100 l / min.
  • the pressure fluid temperature can vary between -20 ° C and a maximum of 80 ° C and the viscosity of the fluid between 10 and 380 mm 2 / s.
  • Such valves are sold, for example, by Flutec Fluidtechnische Act GmbH and are known in the art, so that a further detailed description can be dispensed with.
  • the valves 41 a, 41 b and 41 c are at least one control device 50th connected, which the valves in response to various control variables 51 after controls a given algorithm.
  • a control variable can For example, be a manually operated button (emergency quick discharge), wherein As a result, the valves 41 a, 41 b, 41 c and 40 a, 40 b, 40 c open and the valve 42 in the "emptying position" is made.
  • the table shows a plus sign + for an open position of the valve and a minus sign - for a closed position of the valve.
  • For the valve 42 is +1 for pressurizing the system and -1 for the system empty the hydraulic system. It should also be noted that the valves are natural can not be brought into an open and a closed position, but that in particular depending on the valves used a variety of intermediate positions are possible.
  • valves 40a, 40b, 40c also open, wherein the hydraulic oil via the hydraulic lines 20 a, b, c and 43 via the valve 42, which is in the "emptying position" is discharged.
  • this circuit is the hydraulic oil a clear hydraulic Resistance opposite, reducing the pressure in the pressure equipment can only be done relatively slowly.
  • a quick discharge of the press is carried out according to the illustrated Embodiment by opening the valves 41 a, 41 b, 41 c, 40 a, 40 b, 40 c. Furthermore, the valve 42 is also transferred to the "emptying position".
  • the hydraulic oil is discharged both via the lines of the hydraulic system, as well as via the discharges of the valves 41a, 41b, 41c. Due to the relatively low hydraulic resistance in particular in the derivatives of the valves 41 a, 41 b and 41 c, the emptying of the system takes place much faster because in particular, the oil return through the valves 40a, 40b, 40c and 42 in the sense of a Bypasses through the valves 41 a, 41 b and 41 c is at least partially bypassed.
  • Fig. 7 shows in a time-pressure diagram the influence of the reduced Flow resistance to the pressure reduction in the hydraulic system. So leads for example, the flow resistance during normal opening or relieving the Press that the hydraulic pressure in the pressure equipment significantly is degraded slower than done with the use of additional valves can.
  • the line 61 symbolizes the switching position of the valves 41 a, 41 b and 41 c and the Line 62 the pressure of hydraulic oil in the system, as in the context of Practical trials were determined. So these experiments show that within a Period of about 2 s the pressure in the system and especially within the Pressure devices was reduced to a residual pressure of 0.5 bar, which in the essentially by the throttles in the valves 41 a, 41 b and 41 c is determined.
  • the line 62 ' shows the pressure curve in a regular opening or relieving the pressing device, at a valve position "opening" according to the Table of Fig. 6. In comparison to the quick lift the pressure drop lasts up to a residual pressure of 0.5 bar about 20 seconds.
  • control device By using the control device according to the invention thus results a time advantage that allows the press in critical production conditions quickly and safely relieve or open, in addition to the fabrics too to protect the components of the press equipment from further damage or at least the possible damage to the press device and its To reduce components

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EP04030500A 2003-12-24 2004-12-22 Presse à pince allongée pour traiter un matériau en bande Expired - Lifetime EP1548183B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10361269 2003-12-24
DE10361269A DE10361269B4 (de) 2003-12-24 2003-12-24 Breitnippresse zum Behandeln einer Materialbahn

Publications (2)

Publication Number Publication Date
EP1548183A1 true EP1548183A1 (fr) 2005-06-29
EP1548183B1 EP1548183B1 (fr) 2012-02-29

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Application Number Title Priority Date Filing Date
EP04030500A Expired - Lifetime EP1548183B1 (fr) 2003-12-24 2004-12-22 Presse à pince allongée pour traiter un matériau en bande

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EP (1) EP1548183B1 (fr)
AT (1) ATE547559T1 (fr)
DE (1) DE10361269B4 (fr)
ES (1) ES2381187T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018119381A1 (de) 2018-08-09 2020-02-13 Voith Patent Gmbh Pressanordnung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530371A (en) * 1982-10-30 1985-07-23 Beloit Corporation Control of fluid pressure circuits
DE3602565A1 (de) * 1985-02-01 1986-10-09 J.M. Voith Gmbh, 7920 Heidenheim Walzenpresse mit einer langspalt-presswalze
EP0449390A2 (fr) * 1987-02-23 1991-10-02 Valmet Paper Machinery Inc. Procédé et appareil pour le contrôle de la distribution de la pression appliquée sur une bande de matériaux
US20030127211A1 (en) * 2001-12-17 2003-07-10 Harald Weigant Process and device for measuring and controlling the nip pressure in the press of a paper machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3306838A1 (de) * 1983-02-26 1984-08-30 J.M. Voith Gmbh, 7920 Heidenheim Presswalze, deren durchbiegung einstellbar ist
FI94267C (fi) * 1992-12-30 1995-08-10 Valmet Paper Machinery Inc Pitkänippipuristimen kenkä

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530371A (en) * 1982-10-30 1985-07-23 Beloit Corporation Control of fluid pressure circuits
DE3602565A1 (de) * 1985-02-01 1986-10-09 J.M. Voith Gmbh, 7920 Heidenheim Walzenpresse mit einer langspalt-presswalze
EP0449390A2 (fr) * 1987-02-23 1991-10-02 Valmet Paper Machinery Inc. Procédé et appareil pour le contrôle de la distribution de la pression appliquée sur une bande de matériaux
US20030127211A1 (en) * 2001-12-17 2003-07-10 Harald Weigant Process and device for measuring and controlling the nip pressure in the press of a paper machine

Also Published As

Publication number Publication date
ES2381187T3 (es) 2012-05-23
ATE547559T1 (de) 2012-03-15
EP1548183B1 (fr) 2012-02-29
DE10361269A1 (de) 2005-07-28
DE10361269B4 (de) 2008-09-18

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