EP3302952A1 - Extrudeuse à vis sans fin - Google Patents

Extrudeuse à vis sans fin

Info

Publication number: EP3302952A1
Authority: EP; European Patent Office
Prior art keywords: screw; openings; screw press; press according; worm shaft
Prior art date: 2015-06-03
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

EP16715500.1A

Other languages

German (de)

English (en)

Other versions

EP3302952B1 (fr

Inventor

Torbjorn HAUGER

Terje BREINES

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 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.)

2015-06-03

Filing date

2016-04-07

Publication date

2018-04-11

2016-04-07 Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH

2018-04-11 Publication of EP3302952A1 publication Critical patent/EP3302952A1/fr

2021-11-03 Application granted granted Critical

2021-11-03 Publication of EP3302952B1 publication Critical patent/EP3302952B1/fr

Status Active legal-status Critical Current

2036-04-07 Anticipated expiration legal-status Critical

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
- B30B9/12—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 pressing worms or screws co-operating with a permeable casing
- B30B9/121—Screw constructions

Definitions

Such dewatering devices have been known for a long time and are used successfully, in particular in the thickening of pulp suspensions in machines for producing a fibrous web.
a driven screw conveyor is usually arranged within a substantially concentric cylindrical or conical, perforated sheet metal jacket or the like.
the radially added suspension is dehydrated in cooperation with a damming device, whereby the water can escape through the perforated metal jacket or the like, while the rejects are retained.
the known dewatering screws are designed as described, they are subject to particularly great wear as a result of the intensive friction between the reject and the components of the machine. Namely, there is a considerable relative movement at the same time enormous axial and radial forces between the already heavily thickened fabric and the components instead.
the perforation of the jacket, especially in the inlet area relatively easy to clog, which greatly dehydration. Therefore, there is an even distribution of the suspension to ensure effective pre-drainage important.
the object of the invention is therefore to improve the efficiency of the drainage with the least possible wear.
the object has been achieved in that at least one screw helix has at least one axial breakthrough.
pressure differences in the suspension can compensate axially along the screw shaft, whereby the screw press is applied uniformly at the inlet.
at least one screw flight should have several axial openings.
each turn of the screw helix has at least one, preferably a plurality of axial openings.
at least one, preferably several, in particular all axial openings should have a circular or an elongated, preferably oval cross-section. This allows a large open area of the screw helix while still providing sufficient stability.
the worm helix is designed as a double helix.
the worm shaft carries two spiral worms running around each other.
At least one, preferably several, in particular all, axial openings may be formed as recesses open radially outwards. This leads to a loosening of the fabric in the screen area and thus increases the drainage performance.
the axial openings should predominantly, preferably exclusively in the inlet opening facing half of the worm shaft are arranged.
the openings should also be present only in an axially relatively limited area, which is preferably outside the range of the inlet opening, in particular begins in the conveying direction immediately after the inlet opening.
the axial openings are present only in a region which extends axially over a maximum of 1/3, in particular at most the worm shaft and / or the maximum axially over 1, 2 m , in particular at most 1 m of the worm shaft (3) extends and / or the screw helix has a maximum of 8, preferably a maximum of 5 openings.
a reverse flow against the conveying direction can be effectively counteracted by the fact that the cross-sectional area of the apertures in the conveying direction tends to decrease, preferably from breakthrough to breakthrough.
At least a portion of, preferably all openings should extend to the worm shaft.
the distance between each two adjacent, axial openings in the circumferential direction is about the same size.
Figure 1 a schematic longitudinal section through a screw press
the screw press shown in FIG. 1 is used for dewatering a pulp suspension formed at least partially of waste paper, as required for producing a fibrous web.
the screw press has a, in a cylindrical shell. 2
the worm shaft 3 and / or the jacket 2 may be designed and arranged in such a conical manner that the annular gap 5 gradually narrows in the conveying direction 10.
the thickened suspension After passing through the annular gap 5, the thickened suspension reaches the area of the outlet opening 8.
the worm shaft 3 is driven by a motor 1 1, wherein a transmission, a belt o. can be switched in between.
the construction is particularly simple if, as shown here, the cylinder axis 12 of the jacket 2 extends horizontally.
the worm spiral 4 have a plurality of axially extending apertures 6. These apertures 6 allow axial pressure equalization within the
these axial openings 6 are oval with longitudinal extent in the circumferential direction of the screw helix 4th
the axial and here circular openings 6 in FIG. 1 are also arranged only in the half of the worm shaft 3 facing the inlet opening 7.
the area with the openings 6 connects directly to the inlet opening 7 in the conveying direction 10 and extends over a relatively short, axial portion of the screw shaft 3, which is shorter than the total length of the worm shaft 3, in particular shorter than 1 m.
the axial openings 6 are formed in Figure 3 from radially outwardly open recesses.
spiral screw 4 is designed in this example as a double helix. Of the two mutually-running helices of the screw helix 4, only one helix has axial openings 6.
the cross-sectional area of the apertures 6 in the conveying direction 10 from breakthrough 6 to breakthrough 6 becomes smaller.
the apertures 6 extend as far as the worm shaft 3, which can have a positive effect on the stability of the worm spiral 4.
the distance between each two adjacent axial apertures 6 in the circumferential direction is approximately the same size, and it is usually sufficient if the worm spiral 4 has only 5 openings 6 in total.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Treatment Of Sludge (AREA)
Paper (AREA)

EP16715500.1A 2015-06-03 2016-04-07 Extrudeuse à vis sans fin Active EP3302952B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE102015210265.3A DE102015210265A1 (de)	2015-06-03	2015-06-03	Schneckenpresse
PCT/EP2016/057564 WO2016192873A1 (fr)	2015-06-03	2016-04-07	Extrudeuse à vis sans fin

Publications (2)

Publication Number	Publication Date
EP3302952A1 true EP3302952A1 (fr)	2018-04-11
EP3302952B1 EP3302952B1 (fr)	2021-11-03

Family

ID=55701947

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP16715500.1A Active EP3302952B1 (fr)	2015-06-03	2016-04-07	Extrudeuse à vis sans fin

Country Status (3)

Country	Link
EP (1)	EP3302952B1 (fr)
DE (1)	DE102015210265A1 (fr)
WO (1)	WO2016192873A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102021126120B4 (de) *	2021-10-08	2024-10-24	Voith Patent Gmbh	Schneckenpresse

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP4152179B2 (ja) *	2002-12-06	2008-09-17	株式会社クボタ	スクリュープレスおよび脱水方法
DE10315587A1 (de) *	2003-04-05	2004-10-14	Fan Separator Gmbh	Mischschnecke für Schneckenpresse
DE102006002016A1 (de) *	2006-01-13	2007-07-19	Andreas Kufferath Gmbh & Co. Kg	Schneckenwelle für eine Schneckenpresse
DE202006000583U1 (de) *	2006-01-13	2006-04-13	Andreas Kufferath Gmbh & Co Kg	Schneckenwelle für eine Schneckenpresse
ITBO20070342A1 (it) *	2007-05-10	2008-11-11	Babbini S P A	Pressa per disidratazione meccanica
NL2008502C2 (nl) *	2012-03-19	2013-09-23	Smicon B V	Schroefpers.

2015
- 2015-06-03 DE DE102015210265.3A patent/DE102015210265A1/de not_active Withdrawn
2016
- 2016-04-07 EP EP16715500.1A patent/EP3302952B1/fr active Active
- 2016-04-07 WO PCT/EP2016/057564 patent/WO2016192873A1/fr not_active Ceased

Also Published As

Publication number	Publication date
WO2016192873A1 (fr)	2016-12-08
DE102015210265A1 (de)	2016-12-08
EP3302952B1 (fr)	2021-11-03

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Publication	Publication Date	Title
EP1992894B1 (fr)	2014-02-26	Dispositif de séchage par compactage de matériaux de chargement fluides ou en vrac
AT511982B1 (de)	2013-10-15	Schneckenpresse
DE202007007606U1 (de)	2008-10-09	Pressschneckenseparator
EP3302952B1 (fr)	2021-11-03	Extrudeuse à vis sans fin
EP2465674B1 (fr)	2013-09-25	Cylindre cannelé pour la fabrication de carton ondulé
EP3116710B1 (fr)	2021-09-29	Presse à vis
EP3892773B1 (fr)	2025-06-18	Dispositif d'ajout de l'eau de dilution et tambour de dissolution doté d'un tel dispositif
AT395325B (de)	1992-11-25	Vorrichtung zum auftrennen einer zellulosefaserbrei-suspension
EP2780158B1 (fr)	2016-06-15	Presse à vis ii
DE202015009140U1 (de)	2016-11-03	Schneckenpresse
AT14550U1 (de)	2016-01-15	Schneckenpresse
DE202013011787U1 (de)	2014-07-04	Schneckenpresse
DE102011086615A1 (de)	2013-05-23	Schneckenpresse I
AT15674U1 (de)	2018-04-15	Schneckenpresse
DE60007940T2 (de)	2004-11-04	Dichtungsanordnung für Zellstoffentwässerungsanlage
DE4105803C2 (de)	1997-02-13	Einrichtung zum Eindicken von Faserstoffsuspensionen
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DE102011086619A1 (de)	2013-05-23	Schneckenpresse II
DE202017006821U1 (de)	2018-07-12	Schneckenpresse
AT412857B (de)	2005-08-25	Schneckenpresse zum abtrennen von flüssigkeit aus feststoff-flüssigkeits-gemischen, insbesondere faserstoffsuspensionen
DE102013000561B3 (de)	2014-04-10	Pressschneckenseparator und Siebanordnung
DE102021121738A1 (de)	2022-03-10	Schneckenpresse
EP3094479B1 (fr)	2021-04-14	Vis de pression pour séparateur à vis de pression
DE202016001217U1 (de)	2016-03-14	Schneckenpresse
DE102014223272A1 (de)	2015-11-26	Schneckenpresse