WO1992015448A1 - Verfahren und vorrichtung zur erkennung und beseitigung von aufwölbungen von materialbahnen - Google Patents
Verfahren und vorrichtung zur erkennung und beseitigung von aufwölbungen von materialbahnen Download PDFInfo
- Publication number
- WO1992015448A1 WO1992015448A1 PCT/AT1992/000031 AT9200031W WO9215448A1 WO 1992015448 A1 WO1992015448 A1 WO 1992015448A1 AT 9200031 W AT9200031 W AT 9200031W WO 9215448 A1 WO9215448 A1 WO 9215448A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- sensor
- zone
- bulge
- zones
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/24—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using an endless pressing band
-
- 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
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
- D21F1/80—Pulp catching, de-watering, or recovering; Re-use of pulp-water using endless screening belts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
Definitions
- the invention relates to a method for detecting and eliminating bulges of material webs before entering zones of higher pressure and a device for performing this method.
- the aim of the invention is to propose a method for detecting and eliminating bulges of material webs before entering pressure zones, which avoids the above disadvantages.
- This is achieved according to the invention in the method described in more detail at the outset by deflecting a sensor when a bulge occurs and emitting a signal for regulation. It is therefore registered in front of a pressing zone or in the case of several pressing zones in front of each of these zones by scanning the upper band by deflecting a sensor and by means of this signal operating parameters such as e.g. Machine speed or pressure in individual pressure zones, regulated and thereby the bulge removed again.
- This eliminates the need to clean the machine and its surroundings or, when the machine is closed, the disassembly that is otherwise necessary, which considerably increases the availability of the machine.
- the operating pressure of the corresponding pressure zone is advantageously gradually reduced until the bulge has disappeared. This procedure always sets the maximum possible pressure without causing bulges. There is thus an adaptation to the respective substance parameters of the filter cake reached.
- a further embodiment of the method is characterized in that the pressure in the zone lying in the direction of web travel is also reduced when a limit value is undershot.
- the pressure in the pressure zones further ahead is correspondingly reduced when the pressure falls below a pressure limit of the preceding pressure zone, the pressure in the individual pressure zones in web direction being in each case the same or greater than in the preceding zone.
- the differential pressure between the individual press zones automatically adapts to different conditions of the filter cake and a maximum dryness (maximum drainage) of the filter cake is possible while maintaining operational reliability.
- the invention also relates to a device for carrying out the method according to the invention for detecting and eliminating bulges of material webs before entering pressure zones, which is characterized in that a preferably pressure-tight sensor is provided which can be deflected when the material web bulges and after the bulge disappears is resettable.
- a preferably pressure-tight sensor is provided which can be deflected when the material web bulges and after the bulge disappears is resettable.
- An advantageous embodiment of the device according to the invention is characterized in that the sensor consists of a proximity switch and a disk which moves when an inductive sensor of the sensor is extended.
- the disk is connected to a cord or a rope or wire which is attached to a pin in the tilt sensor.
- This design of the sensor makes it easy to manufacture, with the function always being guaranteed, since the connection of the disc to the tilt sensor is achieved by e.g. a cord is only subjected to tension.
- Another embodiment of the device according to the invention is characterized in that the sensor is installed pressure-tight. Such a design enables safe operation of the machine compared to previously known sensors.
- An advantageous development of the device according to the invention is characterized in that the sensor is connected to a freely programmable control.
- a further embodiment is characterized in that the freely programmable control is connected to pressure regulators for the individual pressure zones.
- This embodiment of the device allows the method according to the invention, in particular the regulation of the machine, to be carried out in a simple manner.
- FIG. 1 shows a longitudinal section through a high-pressure dewatering machine
- FIG. 2 shows the control diagram of the system
- FIG. 3 shows a section from FIG. 1 with a built-in sensor and a bulge of the strips
- FIG. 4 shows the sensor according to the invention.
- Fig. 1 shows a high-pressure dewatering machine for dewatering material suspensions.
- the material is applied to a lower sieve 11 at 29, covered with an upper sieve 12 and then between an outer one Webbing 13 and a lower webbing 14 introduced at the deflection rollers 30 and 31.
- the entire device is housed in a frame 10.
- the drainage of the material is achieved by applying pressure at various pressure levels. With 9 the upper and lower frame of the work area is designated.
- the entire pressure range is sealed by a secondary seal 15 at the inlet or outlet of the material.
- the individual pressure areas are separated by means of pressure boxes 16.
- the pressure areas 17 ', 17 ", 17"' have an increasing pressure, the subsequent pressure areas 17 "", 1 ""'correspondingly reduced pressure. The maximum pressure occurs in the pressure range 17 "'and this is where the major part of the drainage takes place.
- Fig. 2 shows a schematic representation of the structure of a machine to which the invention is applied and also shows the structure of the control loops.
- the secondary seals are here again designated 15 and the pressure boxes for separating the individual pressure areas 16.
- the individual pressure areas have been designated in accordance with Fig. 1, 17, 17 “, 17", 17 “” ⁇ 17 “"'.
- the sensors or toggle switches 18 provided according to the invention are shown by way of example, which are connected to a freely programmable controller 19.
- the signals of the toggle buttons 18 act via the freely programmable controller 19 on a corresponding pressure control valve 20, which in turn is a rapid venting valve. 21 operated.
- Pressure sensors 24 arranged in the individual pressure ranges 17 ', 7 ", 17"', 17 “", 17 “”' give the current value to a corresponding manometer 23 on the control panel.
- the corresponding pushbutton 18 is now deflected and sends a signal to the freely programmable control 19 and a corresponding control lamp 22.
- the regulation can now basically be done in two different ways:
- the control reduces all pressures to the minimum value of the respective zone. This pressure remains pending until the bulge message disappears. Then the pressure of the zone in which the bulge has occurred. reduced by a reduction amount, " now rode during a preset waiting time If there is no new bulging, the pressure in the zone is increased again by the previously reduced amount. If bulging occurs again before the waiting time has expired, the pressure is reduced again by a reduction amount and the waiting time begins again. As a result, the maximum pressure is set in each zone, which just does not lead to bulging.
- the signal sent to the controller 19 then regulates the pressure of the individual pressure areas or pressure zones accordingly, so that the maximum pressure and thus the maximum drainage performance without bulging (belly formation) results in the properties of the filter cake 25.
- the sensor or toggle switch 18 used in the invention is now shown in detail in FIG. 4. It consists of a sleeve 1, into which an inductive proximity switch 8 is screwed and fixed by means of a counter nut (not shown in FIG. 4) with regard to its distance from a disk 2, which is located on the other side of the sleeve 1. The disc 2 is pressed in the direction of the proximity switch 8 by means of a spring 3. The position of the sensor 4 relative to the frame 9 is adjusted by means of a nut 7. The sensor 4 of the
- Sensor 18 is connected to the disk 2 by means of a wire 5 which is attached to the pins 6. If the sensor 4 is now deflected, the wire 5 is tightened and the disk 2 is thus removed from the proximity switch 8. This then triggers a signal, to which the control responds.
- the invention can be used not only in high-pressure drainage machines, but also in any other system in which webs are exposed to different pressures and bulges can occur. In particular, use in front of press rolls is possible.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Paper (AREA)
- Filtration Of Liquid (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Drying Of Solid Materials (AREA)
- Control Of Conveyors (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
Claims
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI933939A FI933939A0 (fi) | 1991-03-11 | 1992-03-09 | Foerfarande och anordning foer identifiering och avlaegsnande av upphoejningar i materialbanor |
| US08/117,145 US5417865A (en) | 1991-03-11 | 1992-03-09 | Method and device for the detection and removal of bulges in continuous strips of material |
| DE4290673A DE4290673C1 (de) | 1991-03-11 | 1992-03-09 | Verfahren zur Erkennung und Beseitigung von Aufwölbungen der Druckbänder in einer Entwässerungsmaschine und Vorrichtung zu seiner Durchführung |
| DE4290673D DE4290673D2 (de) | 1991-03-11 | 1992-03-09 | Verfahren und Vorrichtung zur Erkennung und Beseitigung von Aufwölbungen von Materialbahnen |
| AU13355/92A AU664836B2 (en) | 1991-03-11 | 1992-03-09 | Method and device for the detection and removal of bulges in continuous strips of material |
| EP92905805A EP0575385B1 (de) | 1991-03-11 | 1992-03-09 | Verfahren und vorrichtung zur erkennung und beseitigung von aufwölbungen von materialbahnen |
| SK965-93A SK96593A3 (en) | 1991-03-11 | 1992-03-09 | Method and device for the detection and removal of bulges in continuous strips of material |
| RU9293057189A RU2089397C1 (ru) | 1991-03-11 | 1992-03-09 | Способ обнаружения и устранения вздутий полотнищ из фильтрованного кека и устройство для его осуществления |
| PL92300597A PL168208B1 (pl) | 1991-03-11 | 1992-03-09 | Sposób i urzadzenie do stwierdzania obecnosci i usuwania wybrzuszen wsteg materialu PL |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA516/91 | 1991-03-11 | ||
| AT0051691A AT395116B (de) | 1991-03-11 | 1991-03-11 | Verfahren und vorrichtung zur erkennung und beseitigung von aufwoelbungen von materialbahnen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1992015448A1 true WO1992015448A1 (de) | 1992-09-17 |
Family
ID=3492680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AT1992/000031 Ceased WO1992015448A1 (de) | 1991-03-11 | 1992-03-09 | Verfahren und vorrichtung zur erkennung und beseitigung von aufwölbungen von materialbahnen |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US5417865A (de) |
| EP (1) | EP0575385B1 (de) |
| JP (1) | JP2724247B2 (de) |
| AT (1) | AT395116B (de) |
| AU (1) | AU664836B2 (de) |
| CA (1) | CA2105999A1 (de) |
| CZ (1) | CZ281222B6 (de) |
| DE (2) | DE4290673D2 (de) |
| ES (1) | ES2067328T3 (de) |
| FI (1) | FI933939A0 (de) |
| HU (1) | HUT67727A (de) |
| PL (1) | PL168208B1 (de) |
| RU (1) | RU2089397C1 (de) |
| SK (1) | SK96593A3 (de) |
| WO (1) | WO1992015448A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6050138A (en) | 1997-10-22 | 2000-04-18 | Exponent, Inc. | System and method for performing bulge testing of films, coatings and/or layers |
| RU2197389C1 (ru) * | 2001-05-03 | 2003-01-27 | Ветошкин Андрей Владиславович | Валковый пресс для брикетирования сыпучих и пластичных материалов |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969668A (en) * | 1974-01-15 | 1976-07-13 | Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft | Method for checking the planarity of a cold-rolled ferromagnetic strip |
| GB2082218A (en) * | 1980-08-18 | 1982-03-03 | Beloit Corp | Extended nip press |
| WO1986006471A1 (fr) * | 1985-04-19 | 1986-11-06 | GAO GESELLSCHAFT FÜR AUTOMATION UND ORGANISATION m | Systeme de mesure de l'epaisseur pour materiau en feuilles |
| FR2635272A1 (fr) * | 1988-08-11 | 1990-02-16 | Andritz Ag Maschf | Dispositif pour presser et deshydrater ou filtrer des boues, des suspensions de fibres ou de cellulose |
| EP0283870B1 (de) * | 1987-03-21 | 1990-10-31 | Dorr-Oliver Incorporated | Verfahren zum Entwässern von Filterkuchen und Vorrichtung zur Durchführung des Verfahrens |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1743117A (en) * | 1928-04-03 | 1930-01-14 | Joshua Tetley & Son Ltd | Filter press |
| GB1061284A (en) * | 1963-03-13 | 1967-03-08 | Force Controls Company | Strain sensing device |
| DE1473581A1 (de) * | 1963-07-31 | 1970-07-16 | Kawasaki Steel Co | Geraet zum Pruefen der Dehnung von Metallproben |
| DE2449813C3 (de) * | 1974-10-19 | 1981-11-19 | Estel Hoesch Werke Ag, 4600 Dortmund | Vorrichtung zur Überwachung der störenden Welligkeit bei der Ultraschallprüfung von laufenden Bändern |
| CH592465A5 (de) * | 1975-07-28 | 1977-10-31 | Chemap Ag | |
| US4650571A (en) * | 1985-11-29 | 1987-03-17 | H. R. Black Company | Automatic indexer for industrial filters |
| AT386544B (de) * | 1986-08-18 | 1988-09-12 | Andritz Ag Maschf | Maschine zum pressen und entwaessern bzw. filtrieren |
| AT385681B (de) * | 1986-08-18 | 1988-05-10 | Andritz Ag Maschf | Druckeinrichtung fuer maschinen bzw. damit versehene maschine zum entwaessern bzw. filtrieren bzw. fuer pressgut |
| JPS6382271A (ja) * | 1986-09-22 | 1988-04-13 | Sankyo Seisakusho:Kk | 材料送り装置 |
| DE3636799A1 (de) * | 1986-10-29 | 1988-05-05 | Rittershaus & Blecher Gmbh | Verfahren zur regelung des filterplatten-anlagedruckes bei filterpressen und vorrichtung zur durchfuehrung des verfahrens |
| DE3715828A1 (de) * | 1987-05-12 | 1988-11-24 | Albert Baehr | Kontinuierlich arbeitende hochdruck-filterpresse zum entwaessern von schlamm |
| FR2616681B1 (fr) * | 1987-06-17 | 1989-09-29 | Degremont | Appareil destine a la detection d'un fluage de boues en cours de deshydratation sur un filtre a bandes presseuses |
| JPS6442006A (en) * | 1987-08-08 | 1989-02-14 | Victor Company Of Japan | Production of magnetic head |
| US5203996A (en) * | 1988-08-11 | 1993-04-20 | Maschinenfabrik Andritz Actiengesellschaft | Apparatus for pressing, dewatering or filtering |
| US5045186A (en) * | 1988-09-22 | 1991-09-03 | Kurita Machinery Manufacturing Company Limited | Filtration method and filter press for employing the method |
| AT407133B (de) * | 1989-09-25 | 2000-12-27 | Andritz Ag Maschf | Doppelsiebbandpresse |
-
1991
- 1991-03-11 AT AT0051691A patent/AT395116B/de not_active IP Right Cessation
-
1992
- 1992-03-09 RU RU9293057189A patent/RU2089397C1/ru active
- 1992-03-09 EP EP92905805A patent/EP0575385B1/de not_active Expired - Lifetime
- 1992-03-09 DE DE4290673D patent/DE4290673D2/de not_active Expired - Fee Related
- 1992-03-09 US US08/117,145 patent/US5417865A/en not_active Expired - Fee Related
- 1992-03-09 WO PCT/AT1992/000031 patent/WO1992015448A1/de not_active Ceased
- 1992-03-09 AU AU13355/92A patent/AU664836B2/en not_active Ceased
- 1992-03-09 ES ES92905805T patent/ES2067328T3/es not_active Expired - Lifetime
- 1992-03-09 DE DE4290673A patent/DE4290673C1/de not_active Expired - Fee Related
- 1992-03-09 CA CA002105999A patent/CA2105999A1/en not_active Abandoned
- 1992-03-09 HU HU9302564A patent/HUT67727A/hu unknown
- 1992-03-09 JP JP4505442A patent/JP2724247B2/ja not_active Expired - Lifetime
- 1992-03-09 PL PL92300597A patent/PL168208B1/pl unknown
- 1992-03-09 SK SK965-93A patent/SK96593A3/sk unknown
- 1992-03-09 CZ CS931890A patent/CZ281222B6/cs unknown
- 1992-03-09 FI FI933939A patent/FI933939A0/fi not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969668A (en) * | 1974-01-15 | 1976-07-13 | Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft | Method for checking the planarity of a cold-rolled ferromagnetic strip |
| GB2082218A (en) * | 1980-08-18 | 1982-03-03 | Beloit Corp | Extended nip press |
| WO1986006471A1 (fr) * | 1985-04-19 | 1986-11-06 | GAO GESELLSCHAFT FÜR AUTOMATION UND ORGANISATION m | Systeme de mesure de l'epaisseur pour materiau en feuilles |
| EP0283870B1 (de) * | 1987-03-21 | 1990-10-31 | Dorr-Oliver Incorporated | Verfahren zum Entwässern von Filterkuchen und Vorrichtung zur Durchführung des Verfahrens |
| FR2635272A1 (fr) * | 1988-08-11 | 1990-02-16 | Andritz Ag Maschf | Dispositif pour presser et deshydrater ou filtrer des boues, des suspensions de fibres ou de cellulose |
Also Published As
| Publication number | Publication date |
|---|---|
| PL168208B1 (pl) | 1996-01-31 |
| EP0575385A1 (de) | 1993-12-29 |
| AT395116B (de) | 1992-09-25 |
| FI933939A7 (fi) | 1993-09-09 |
| JPH06507348A (ja) | 1994-08-25 |
| ES2067328T3 (es) | 1995-03-16 |
| AU1335592A (en) | 1992-10-06 |
| HUT67727A (en) | 1995-04-28 |
| FI933939L (fi) | 1993-09-09 |
| ATA51691A (de) | 1992-02-15 |
| HU9302564D0 (en) | 1994-01-28 |
| FI933939A0 (fi) | 1993-09-09 |
| RU2089397C1 (ru) | 1997-09-10 |
| CA2105999A1 (en) | 1992-09-12 |
| DE4290673C1 (de) | 1996-12-05 |
| CZ281222B6 (cs) | 1996-07-17 |
| AU664836B2 (en) | 1995-12-07 |
| DE4290673D2 (de) | 1994-06-09 |
| US5417865A (en) | 1995-05-23 |
| SK96593A3 (en) | 1994-04-06 |
| EP0575385B1 (de) | 1994-11-23 |
| CZ189093A3 (en) | 1995-03-15 |
| JP2724247B2 (ja) | 1998-03-09 |
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