ES2234759T3 - DRAINING SHEET FOR A PAPER MANUFACTURING MACHINE. - Google Patents
DRAINING SHEET FOR A PAPER MANUFACTURING MACHINE.Info
- Publication number
- ES2234759T3 ES2234759T3 ES01129550T ES01129550T ES2234759T3 ES 2234759 T3 ES2234759 T3 ES 2234759T3 ES 01129550 T ES01129550 T ES 01129550T ES 01129550 T ES01129550 T ES 01129550T ES 2234759 T3 ES2234759 T3 ES 2234759T3
- Authority
- ES
- Spain
- Prior art keywords
- counter knife
- assembly
- connection
- fixed
- fixed structure
- 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.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title description 3
- 239000004744 fabric Substances 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 238000005096 rolling process Methods 0.000 description 5
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
- D21F1/48—Suction apparatus
- D21F1/483—Drainage foils and bars
- D21F1/486—Drainage foils and bars adjustable
Abstract
Un montaje de contracuchilla (10) para una sección húmeda (1) de una máquina de fabricación de papel, que comprende una estructura fija (13) fijada a un bastidor (5) de la máquina; una contracuchilla (9) conectada a dicha estructura fija (13) y móvil, con respecto a él, por medios de actuación (25) para ejercer presión sobre dos telas metálicas (2, 3) que se desplazan entre dicha contracuchilla (9) y una superficie de guía (8) a lo largo de un camino de desplazamiento sustancialmente horizontal (P); y medios de conexión (22) interpuestos entre dicha contracuchilla (9) y dicha estructura fija (13), caracterizado porque dichos medios de conexión (22) son medios de conexión de tipo paralelogramo articulado e incluyen una pluralidad de elementos de varillas articuladas (16) embisagrados en dicha estructura fija (13) y a dicha contracuchilla (9) alrededor de ejes horizontales respectivos (A, B) perpendiculares a dicho camino de desplazamiento (P).A counter knife assembly (10) for a wet section (1) of a papermaking machine, comprising a fixed structure (13) fixed to a frame (5) of the machine; a counter knife (9) connected to said fixed (13) and mobile structure, with respect thereto, by actuation means (25) to exert pressure on two metal fabrics (2, 3) that move between said counter knife (9) and a guide surface (8) along a substantially horizontal travel path (P); and connection means (22) interposed between said counter knife (9) and said fixed structure (13), characterized in that said connection means (22) are connection means of articulated parallelogram type and include a plurality of articulated rod elements (16 ) hinged on said fixed structure (13) and said counter knife (9) around respective horizontal axes (A, B) perpendicular to said travel path (P).
Description
Lámina de drenaje para una máquina de fabricación de papel.Drainage sheet for a manufacturing machine of paper.
El presente invento se refiere a un montaje de contracuchilla para una máquina de fabricación de papel.The present invention relates to an assembly of counter knife for a paper making machine.
Como es sabido, las máquinas de fabricación de papel comprenden una unidad, o sección húmeda, para separar agua de la pasta de papel y donde ésta es alimentada y comprimida entre dos telas metálicas permeables que se solapan a lo largo de una parte de sus respectivos caminos. En la parte de solape, una de las telas metálicas (en especial, la tela metálica superior) se desliza en contacto con una caja de vacío; y la otra tela metálica es prensada contra la primera por varias contracuchillas que se extienden transversalmente a la dirección de desplazamiento de las telas metálicas.As is known, the manufacturing machines of paper comprise a unit, or wet section, to separate water from the pulp and where it is fed and compressed between two permeable metal fabrics that overlap along one part of their respective paths. In the overlapping part, one of the fabrics metallic (especially the upper metallic fabric) slides in contact with a vacuum box; and the other metal cloth is pressed against the first by several counter knives that extend transversely to the direction of fabric displacement metallic
En soluciones conocidas, las contracuchillas están normalmente montadas para deslizarse dentro de rodillos de rodadura verticales y, en una solución conocida, las telas metálicas son empujadas hacia adelante por un actuador neumático tubular flexible situado debajo de cada contracuchilla son "infladas" con aire comprimido.In known solutions, the counter knives are normally mounted to slide inside rollers of vertical rolling and, in a known solution, fabrics Metals are pushed forward by a pneumatic actuator flexible tubular located under each counter knife are "inflated" with compressed air.
Una desventaja importante de la disposición de contracuchilla anterior consiste en que la solución acuosa retirada de la pasta de papel comprimida entre las telas metálicas gotea entre las contracuchillas y los respectivos rodillos de rodadura y forma depósitos que, después del atasco de la máquina, puede dar lugar a que las contracuchillas se agarroten, o a un levantamiento irregular de las contracuchillas a través del ancho de las telas metálicas.A major disadvantage of the provision of anterior counter knife is that the aqueous solution removed of the compressed paper pulp between the metallic cloth drips between the counter knives and the respective rolling rollers and it forms deposits that, after the machine jam, can give place for the counter knives to seize, or to a lift irregular counter knives across the width of the fabrics metallic
Por tanto, esto puede dar lugar a la inconsistencia de la calidad del papel.Therefore, this can lead to inconsistency of paper quality.
El documento WO 98 38380 A explica un montaje de contracuchilla para una sección húmeda de una máquina de fabricación de papel con las características del preámbulo de la reivindicación 1 y que incluye, especialmente, una pluralidad de juntas articuladas que conectan la contracuchilla con un bastidor de la máquina.WO 98 38380 A explains an assembly of counter knife for a wet section of a machine paper making with the characteristics of the preamble of the claim 1 and including, in particular, a plurality of articulated joints that connect the counter knife to a frame of machine.
Los elementos de la junta articulada están embisagrados alrededor de ejes que son paralelos a la dirección de desplazamiento de las telas metálicas drenantes del papel, es decir, paralelos a la fuerza de rozamiento generada entre la contracuchilla y la tela metálica de contacto.The articulated joint elements are hinged around axes that are parallel to the direction of displacement of paper draining metal fabrics, is that is, parallel to the frictional force generated between the counter knife and metal contact fabric.
Es un objeto del presente invento proporcionar un montaje de contracuchilla para la sección húmeda de una máquina de fabricación de papel, diseñada para eliminar las desventajas anteriormente mencionadas típicamente inherentes a los montajes de contracuchilla conocidos.It is an object of the present invention to provide a counter knife assembly for the wet section of a machine papermaking, designed to eliminate the disadvantages above mentioned typically inherent in the assemblies of Knives counter knife.
De acuerdo con el presente invento, se ha provisto un montaje de contracuchilla para una sección húmeda de una máquina de fabricación de papel como la reivindicada en la reivindicación 1.In accordance with the present invention, it has been provided with a counter knife assembly for a wet section of a papermaking machine as claimed in the claim 1.
Haciendo referencia a los dibujos anexos, se describirá a continuación a modo de ejemplo una realización preferida del presente invento, en los que:Referring to the attached drawings, he will now describe by way of example an embodiment preferred of the present invention, in which:
La Figura 1 muestra una vista lateral esquemática de la sección húmeda de una máquina de fabricación de papel que ofrece varios montajes de contracuchilla de acuerdo con el presente invento;Figure 1 shows a schematic side view of the wet section of a papermaking machine that offers several counter knife assemblies in accordance with this invention;
La Figura 2 muestra una vista lateral parcialmente seccionada de un montaje de contracuchilla de acuerdo con el presente invento;Figure 2 shows a side view partially sectioned from a counter knife assembly according with the present invention;
La Figura 3 muestra una vista frontal del montaje de la Figura 2;Figure 3 shows a front view of the assembly of Figure 2;
La Figura 4 muestra una vista en planta de un detalle del montaje de la Figura 2.Figure 4 shows a plan view of a assembly detail of Figure 2.
El número (1) en la Figura 1 indica en conjunto una unidad, o sección húmeda, para retirar agua de la pasta de papel en una máquina de fabricación de papel.The number (1) in Figure 1 indicates as a whole a unit, or wet section, to remove water from the paste of paper in a paper making machine.
La unidad (1) comprende dos telas metálicas (2, 3) que se desplazan a lo largo de respectivos caminos sin fin y que se solapan a lo largo de una parte P común sustancialmente horizontal de los dos caminos P1, P2.The unit (1) comprises two metallic fabrics (2, 3) that travel along respective endless roads and that overlap along a substantially common part P horizontal of the two paths P1, P2.
De la tela metálica inferior (2), solamente se ilustra una rama de trabajo superior (2a) que transporta pasta de papel (no mostrada); la pasta de papel es depositada en la rama (2a) en sentido ascendente de la unidad (1) de forma conocida no mostrada; y la tela metálica (2) es accionada por medios conocidos no mostrados.Of the lower metallic fabric (2), only illustrates a superior work branch (2a) that transports pasta from paper (not shown); the pulp is deposited on the branch (2nd) upstream of the unit (1) in known manner no shown; and the metal cloth (2) is operated by known means not shown
La tela metálica superior (3) está soportada, accionada y mantenida tensa por varios cilindros (4) montados en un bastidor fijo (5).The upper metal fabric (3) is supported, driven and held taut by several cylinders (4) mounted on a fixed frame (5).
A lo largo de la parte P, donde las telas metálicas (2) y (3) se solapan y comprimen la pasta de papel, la tela metálica superior (3) va en contacto con una caja de vacío (6) conectada a un equipo de succión no mostrado. La caja de vacío (6) está definida en su parte inferior por varios elementos transversales (7) que soportan la tela metálica (3) y están convenientemente definidos por insertos cerámicos paralelos separados y que definen en su montaje una superficie de guía (8) para guiar la tela metálica (3).Along part P, where the fabrics metallic (2) and (3) overlap and compress the paper pulp, the upper metal fabric (3) is in contact with a vacuum box (6) connected to a suction device not shown. The vacuum box (6) It is defined in its lower part by several elements transverse (7) that support the metal fabric (3) and are conveniently defined by parallel ceramic inserts separated and defining a guide surface (8) to guide the wire netting (3).
Las telas metálicas (2) y (3) son mantenidas en contacto una con otra y la superficie de guía (8) por varias contracuchillas (9), cada una de las cuales forma parte de un montaje de contracuchilla respectivo (10) mostrado en detalle en las Figuras 2 a 4.The metallic fabrics (2) and (3) are kept in contact with each other and the guide surface (8) for several counter knives (9), each of which is part of a respective counter knife assembly (10) shown in detail in Figures 2 to 4.
Como los montajes de contracuchilla (10) son idénticos, solamente se describe a continuación uno de ellos, designado como "montaje (10)" por motivo de simplicidad, lo mismo que naturalmente también se aplica a todos los demás.As the counter knife assemblies (10) are identical, only one of them is described below, designated as "assembly (10)" for the sake of simplicity, what same that naturally also applies to all others.
El montaje (10) comprende una estructura de soporte fija (13) definida por una barra (14), montada de forma que se pueda desmontar en el bastidor (5) de la unidad (1) y que se extiende a todo lo ancho de las telas metálicas (2, 3), y por varios postes (15) fijados a la parte superior de, saliendo de, e igualmente separados a lo largo de, la barra (14). Solamente a modo de ejemplo, para las telas metálicas (2, 3) de 3m de ancho, se pueden usar seis postes (15) igualmente separados.The assembly (10) comprises a structure of fixed support (13) defined by a bar (14), mounted so that can be disassembled in the frame (5) of the unit (1) and that extends to the full width of metal fabrics (2, 3), and by several posts (15) fixed to the top of, leaving, and equally separated along, the bar (14). Only by way For example, for metallic fabrics (2, 3) 3m wide, they can use six posts (15) equally separated.
La contracuchilla (9) está definida por un cuerpo principal (17) que se extiende a través de las telas metálicas (2, 3) y convenientemente realizadas de material plástico, y que tiene un inserto cerámico (18) que se extiende a lo largo de un borde superior del cuerpo (17) y que se desliza contra la tela metálica (2). Una cara vertical (20) del cuerpo principal (17) enfrente de la estructura fija (13) está equipada con varias barras verticales igualmente espaciadas (21), cada una enfrente y conectada a un poste respectivo (15) de la estructura fija (13) mediante pares de elementos de varillas articuladas (16).The counter knife (9) is defined by a body main (17) that extends through metal fabrics (2, 3) and conveniently made of plastic material, and it has a ceramic insert (18) that extends along an edge upper body (17) and sliding against the wire mesh (2). A vertical face (20) of the main body (17) in front of the fixed structure (13) is equipped with several vertical bars equally spaced (21), each opposite and connected to a respective post (15) of the fixed structure (13) by pairs of articulated rod elements (16).
Cada poste (15) define, con la barra respectiva (21) y los elementos (16), un paralelogramo articulado que conecta el montaje (22) interpuesto entre la barra (14) y la contracuchilla (9).Each post (15) defines, with the respective bar (21) and the elements (16), an articulated parallelogram that connects the assembly (22) interposed between the bar (14) and the counter knife (9).
Debido al paralelogramo articulado que conecta los montajes (22), la contracuchilla (9) puede moverse en una dirección sustancialmente vertical sin necesidad de rodillos de rodadura.Due to the articulated parallelogram that connects the assemblies (22), the counter knife (9) can move in a substantially vertical direction without rollers rolling
Más específicamente, cada montaje de conexión (22) comprende dos pares de elementos (16) situados en lados opuestos del poste (15) y la barra (21), y cada uno definido por dos elementos paralelos (16) que se extienden en una dirección sustancialmente horizontal. Cada elemento tiene un extremo (16a) embisagrado en el poste (15), y otro extremo (16b) embisagrado en la barra (21) alrededor de sus respectivos ejes horizontales A, B que son perpendiculares al camino de desplazamiento P de las telas metálicas (2, 3).More specifically, each connection assembly (22) comprises two pairs of elements (16) located on sides opposite of the pole (15) and the rod (21), and each defined by two parallel elements (16) that extend in one direction substantially horizontal. Each element has one end (16a) hinged on the pole (15), and another end (16b) hinged on the bar (21) around their respective horizontal axes A, B that are perpendicular to the path of travel P of the fabrics metallic (2, 3).
El cuerpo (17) de la contracuchilla (9) tiene un entrante inferior longitudinal (24) que aloja parcialmente un actuador neumático (25) definido por un elemento tubular flexible. El actuador (25) descansa sobre una placa base (26) que forma parte del bastidor (5) de la unidad (1), y puede ser conectado a y puesto a presión por una fuente de aire comprimido (no mostrada) para elevar la contracuchilla (9) para hacer contacto con la tela metálica (2) con una presión que depende de la presión del actuador en sí.The body (17) of the counter knife (9) has a longitudinal lower recess (24) that partially houses a pneumatic actuator (25) defined by a flexible tubular element. The actuator (25) rests on a base plate (26) that is part of the frame (5) of the unit (1), and can be connected to and placed under pressure from a source of compressed air (not shown) to raise the counter knife (9) to make contact with the fabric metal (2) with a pressure that depends on the actuator pressure per se.
La contracuchilla (9) puede moverse entre unas posiciones límite superior e inferior mostradas por las líneas de trazos en la Figura 2 y definidas respectivamente por las barras (21) que hacen contacto respectivamente con las placas de parada superior (28) fijadas a los postes (15), y por las barras (21) que hacen contacto con la barra (14).The counter knife (9) can move between upper and lower limit positions shown by the lines of strokes in Figure 2 and defined respectively by the bars (21) that make contact respectively with the stop plates upper (28) fixed to the posts (15), and by the bars (21) that make contact with the bar (14).
En la posición de trabajo mostrada en la Figura 2 por la línea continua, los elementos (16) son sustancialmente horizontales; y dentro del grado de ajuste de la contracuchilla (9), como una función de la presión del actuador (25), el movimiento de la contracuchilla (9) es sustancialmente similar a un movimiento de traslación vertical recto.In the work position shown in Figure 2 by the continuous line, the elements (16) are substantially horizontal; and within the degree of adjustment of the counter knife (9), as a function of the actuator pressure (25), the movement of the counter knife (9) is substantially similar to a straight vertical translation movement.
De la anterior descripción estarán claras las ventajas del montaje de contracuchilla (10) de acuerdo con el presente invento. En particular, utilizando los montajes de conexión de paralelogramo articulado (22), la contracuchilla (9) puede ser conectada a una estructura fija (13) sin necesidad de rodillos de rodadura convencionales.From the above description, the advantages of the mounting of counter knife (10) according to the present invention In particular, using the assemblies of articulated parallelogram connection (22), counter knife (9) it can be connected to a fixed structure (13) without the need for conventional rolling rollers.
Esto, por tanto, elimina todos los problemas planteados por la formación de escamas en los rodillos de rodadura y, especialmente, cualquier agarrotamiento de la contracuchilla o irregularidades en el papel debidos a una elevación irregular de la contracuchilla (9).This, therefore, eliminates all problems raised by the formation of scales on the rolling rollers and, especially, any seizing of the counter knife or paper irregularities due to irregular elevation of the counter knife (9).
Además, cada montaje de contracuchilla (10) puede ser retirado simplemente desconectando la barra (14) del bastidor (5).In addition, each counter knife assembly (10) can be removed simply by disconnecting the bar (14) from the frame (5).
Claims (7)
(21).2. An assembly as claimed in claim 1, characterized in that said articulated parallelogram connection means comprise several connection assemblies (22) spaced along said counter knife (9); each of said connection assemblies (22) comprising a first connection element (15) that is an integral part of said fixed structure (13), a second connection element (21) that is an integral part of said counter knife (9) and opposite a respective connection element (15), and at least a pair of articulated rod elements (16), each having a first end (16a) hinged on said first connection element (15), and a second end ( 16b) hinged on said second connection element
(twenty-one).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2000TO001149A IT1320857B1 (en) | 2000-12-12 | 2000-12-12 | CONTROLAMA GROUP FOR A PAPER MANUFACTURING MACHINE. |
| ITTO001149 | 2000-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2234759T3 true ES2234759T3 (en) | 2005-07-01 |
Family
ID=11458278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES01129550T Expired - Lifetime ES2234759T3 (en) | 2000-12-12 | 2001-12-11 | DRAINING SHEET FOR A PAPER MANUFACTURING MACHINE. |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1215336B1 (en) |
| AT (1) | ATE289642T1 (en) |
| DE (1) | DE60109015T2 (en) |
| ES (1) | ES2234759T3 (en) |
| IT (1) | IT1320857B1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2370046A (en) | 2000-12-15 | 2002-06-19 | Astenjohnson Inc | Adjustable resilient blade support |
| SE526974C2 (en) * | 2004-02-18 | 2005-11-29 | Uddevalla Mek Verkst Ab | List arrangement for a double wire former including a dynamic backplate carrier |
| DE102008040025A1 (en) | 2008-06-30 | 2009-12-31 | Voith Patent Gmbh | Bar arrangement for machine for producing fibrous web, particularly paper or cardboard web, has stationary guide device which comprises two stationary guide strands |
| DE102008040020A1 (en) | 2008-06-30 | 2009-12-31 | Voith Patent Gmbh | Bar arrangement for machine for producing fibrous web, particularly paper or cardboard web, has stationary guide device which comprises multiple spaced and stationary C-shaped guide units |
| DE102008040021A1 (en) | 2008-06-30 | 2009-12-31 | Voith Patent Gmbh | Ledge arrangement for use in e.g. paper sheet production machine, has guiding units surrounding lower area of ledges by guiding arms, and rubber pads arranged at inner side of respective guiding arm for exerting guiding effect on ledges |
| DE102008040032A1 (en) | 2008-06-30 | 2009-12-31 | Voith Patent Gmbh | Strip arrangement for a machine for producing a fibrous web |
| DE102008040016A1 (en) | 2008-06-30 | 2009-12-31 | Voith Patent Gmbh | Ledge arrangement for use in e.g. paper sheet production machine, has fixed guiding device fixed at fixed structure or at frame and comprises multiple fixed guiding units, which are connected with ledges via spring units |
| US10246825B2 (en) * | 2016-03-17 | 2019-04-02 | Andritz Inc. | Supporting mechanism for a papermaking machine dewatering blade |
| AT519054B1 (en) * | 2016-09-01 | 2018-07-15 | Klaus Ing Bartelmuss | Device for adjusting a wiper strip in a system for producing a paper tape |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4107653A1 (en) * | 1991-03-09 | 1992-09-10 | Escher Wyss Gmbh | DRAINAGE DEVICE FOR THE WET SECTION OF A PAPER MACHINE |
| AT400158B (en) * | 1993-12-21 | 1995-10-25 | Bartelmuss Klaus Ing | DEVICE FOR ADJUSTING THE ALTITUDE AND OR OR THE ANGLE POSITION OF A STRIP ASSIGNED TO THE SCREENING BELT OF A PAPER PRODUCTION PLANT |
| FI95058C (en) * | 1994-11-16 | 1995-12-11 | Valmet Paper Machinery Inc | Paper machine dewatering device list |
| FI100811B (en) * | 1997-02-26 | 1998-02-27 | Valmet Corp | Paper machine dewatering device list |
-
2000
- 2000-12-12 IT IT2000TO001149A patent/IT1320857B1/en active
-
2001
- 2001-12-11 ES ES01129550T patent/ES2234759T3/en not_active Expired - Lifetime
- 2001-12-11 AT AT01129550T patent/ATE289642T1/en active
- 2001-12-11 EP EP01129550A patent/EP1215336B1/en not_active Expired - Lifetime
- 2001-12-11 DE DE60109015T patent/DE60109015T2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE289642T1 (en) | 2005-03-15 |
| IT1320857B1 (en) | 2003-12-10 |
| EP1215336B1 (en) | 2005-02-23 |
| ITTO20001149A0 (en) | 2000-12-12 |
| ITTO20001149A1 (en) | 2002-06-12 |
| DE60109015D1 (en) | 2005-03-31 |
| EP1215336A3 (en) | 2003-01-08 |
| DE60109015T2 (en) | 2005-07-21 |
| EP1215336A2 (en) | 2002-06-19 |
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