WO2021078490A1 - Siebzylinder - Google Patents
Siebzylinder Download PDFInfo
- Publication number
- WO2021078490A1 WO2021078490A1 PCT/EP2020/077554 EP2020077554W WO2021078490A1 WO 2021078490 A1 WO2021078490 A1 WO 2021078490A1 EP 2020077554 W EP2020077554 W EP 2020077554W WO 2021078490 A1 WO2021078490 A1 WO 2021078490A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- end ring
- ring
- profile
- screening device
- profile bars
- 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
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/12—Apparatus having only parallel elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4618—Manufacturing of screening surfaces
Definitions
- the invention relates to a cylindrical screening device with a large number of profile bars, in which several ring-shaped, spaced-apart rod holders extending perpendicular to the cylinder axis or spaced-apart packages of several rod holders are provided on the inside or outside with open-edged recesses, the shape of which corresponds to the rod feet of the profile bars essentially complementary and in which the profile bars are inserted into the recesses parallel to one another and parallel to the cylinder axis, an outer bar holder being arranged in the region of a respective end ring of the screening device.
- cylindrical screening devices of this type is the sorting of pulp suspensions, as is carried out in pressure sorters in the paper manufacturing industry.
- the fibers contained in the suspension should pass through the sieve, while the unwanted solid constituents are rejected at the gap and passed out of the sieve device again.
- the openings have an essentially elongated shape, that is to say slits or gaps, fibrous particles are passed through more easily than the cubic ones, even if both types should be of a similar size.
- DE 10 2006 007 660 A1 shows a possible method for producing such screen baskets, in which the profile bars are clamped in by plastic deformation of the c-shaped butterfly rings provided with recesses for the bars. Particularly suitable profile bars are used for such manufacturing processes. With the help of this process it was possible to make the production considerably cheaper.
- the method is used for sieve baskets in which the rods on the inner edge of the Retaining rings are used. Such an arrangement of the rods is chosen if the suspension is to pass through the slots from the inside to the outside (centrifugal mode of operation). To reshape the retaining rings, bending forces are introduced from the outside at the joint ends, with the joint ends being supported on the inside on support rollers.
- EP 31 43 198 A1 describes a sieve device in which the retaining rings are each formed by a rod holder package made up of several rod holders. When the rod holder packs are bent into rings, the profile rods are clamped in the recesses because of the different positions of the neutral fibers in the rod holders of a rod holder pack.
- the object of the invention is therefore to simplify the attachment of the end rings.
- the object was achieved in that at least the respective outer rod holder is releasably connected to the end ring. This eliminates the problem of welding the end rings on, which is particularly problematic with regard to additional stresses. This also makes it possible to reuse the end rings.
- the invention can also be used in sieve devices with rod holder packages, at least the outer rod holder, several or all rod holders of the rod holder package being detachably connected to the end ring.
- the detachable connection is particularly simple if it is designed as a screw connection.
- one or more profile rods should be profiled on the radial outer or inner circumference in the area of the respective end ring and the contact area of the end ring opposite this profile should be complementary.
- the respective end ring comprises a blocking ring arranged perpendicular to the cylinder axis, one or more profile bars are profiled on the radial outer or inner circumference in the area of the respective blocking ring and the contact area opposite this profile of the blocking ring is shaped complementary to this.
- the blocking ring To stabilize the position of the blocking ring, it should be axially fixed on the end ring or between the end ring and the outer rod holder.
- the blocking ring is designed as an annular wire or an annular disk.
- the profiling of the profile bars should be designed, regardless of the type of axial position fixation, so that the interaction with the opposite, complementary profile limits the axial free space for an axial displacement of the profile bars or does not exist.
- This form-fit connection, direct or indirect via the blocker ring, between the profile rods and the respective end ring also increases the axial load-bearing capacity of the connection between the end ring and the screening device.
- the end ring is constructed in several parts.
- the fixation of the profile rods in the other rod holders can advantageously take place in that the rod holders are deformed by forces acting radially from the outside on the rod holders and / or the profile rods until the profile rods are permanently interlocked in the recesses of these rod holders.
- the profile bars must be fixed in the recesses of the bar holders by welding, gluing or the like.
- FIG. 1 a schematic view of a cylindrical screen basket
- FIG. 2 a schematic cross section through this with punches 8;
- FIGS. 4a + b different cross-sections through an end ring 6 with an outer bar holder 5 and blocking ring 9.
- the rod holders 3, 5 are produced as one-piece rings, for example by means of laser cutting. This is the basis for a high dimensional accuracy of the screen basket.
- the bar holders 3, 5, as can be seen in FIGS. 1 and 2, have a large number of evenly distributed recesses 4 for the profile bars 1. These According to FIG. 3a, recesses 4 offer sufficient play so that the profile bars 1 can be pushed axially through them without any problems.
- the screen basket prefabricated in this way consists of profile bars 1 running parallel to the cylinder axis 2, which are held by several bar holders 3, 5 running perpendicular to the cylinder axis 2.
- FIG. 4b While in FIG. 4b several axially spaced rod holders 3, 5 are provided for example, in FIG. 4a a plurality of axially spaced packs with two rod holders 3, 5 each are used.
- the screen openings of the screen basket are formed by the slots in adjacent profile bars 1.
- such slots often have a width between 0.05 and 2 mm.
- the radial force effect is realized by several punches 8, which are arranged radially evenly distributed over the cylinder circumference and which act radially from the outside directly on the rod holders 3, 5 and are directed in particular towards the cylinder axis 2 of the preassembled screen basket.
- the punches 8 of adjacent rod holders 3, arranged axially next to one another, can also be designed as a common punch 8.
- the pressing surface of all punches 8 pointing in the pressing direction is each formed by a segment of a circle, the radius of which corresponds to the outer radius of the sieve device after the pressing process. Since the outer radius of the sieve device formed by the rod holders 3 is slightly larger before the pressing process than afterwards, there is a small amount of play between the rod holders 3 and the pressing surface in the central part of the punch 8 at the beginning of the pressing process. This play can be accepted at the start of pressing and the associated lower pressing forces and decreases as the pressing progresses.
- the deformation takes place very gently and evenly, so that there is no overstressing of the rod holders 3.5.
- An additional fastening of the profile bars 1 can generally be dispensed with.
- the punches 8 are guided axially and radially in guide grooves.
- the radial force leads to a reduction in the diameter of the force-loaded rod holders 3.5 and a plastic deformation of the rod holders 3.5 in the area of the recesses 4, in the result of which is the space between the profile bar 1 and bar holder 3.5, as shown in Figure 3b, is closed.
- An end ring 6 is located adjacent to an outer rod holder 5 at each of the two end faces of the sieve device.
- end rings 6 are detachably connected in FIG. 4b to the axially outer rod holder 5 and in FIG. 4a to the axially outer package comprising the outer 5 and an adjacent axially inner 3 rod holder by means of a screw connection 10.
- This screw connection 10 takes place via several screws evenly distributed over the circumference of the end ring 6 and is very resilient, which, for example, allows the sieve device to be lifted over an end ring 6.
- welding and corresponding post-processing can be dispensed with.
- the respective end ring 6 comprises a blocking ring 9 arranged perpendicular to the cylinder axis 2.
- This blocking ring 9 is designed as an annular wire with a circular cross-section in FIG. 4a and as an annular disk in FIG. 4b.
- the axial position of the blocking ring 9 is fixed in both cases by clamping a radially outer one Section of the blocking ring 9 between the end ring 6 and the adjacent outer rod holder 5.
- the profile bars 1 are profiled here on the radial outer circumference in the area of the respective blocking ring 9, the contact area of the blocking ring 9 opposite this profile 11 being shaped complementary thereto.
- the profile 11 is designed in such a way that, in cooperation with the complementary contact area, a relative displacement between the profile rod 1 and the blocking ring 9 is prevented.
- the end ring 6 can be divided in the radial, axial or circumferential direction.
- the detachable attachment of the end rings 6 to the outer rod holder 5 or the outer rod holder package can take place regardless of whether the rod holders 5 have their recesses 4, as here, on the inside or on the outside.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Paper (AREA)
- Combined Means For Separation Of Solids (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020227017760A KR20220084177A (ko) | 2019-10-25 | 2020-10-01 | 스크리닝 실린더 |
| EP20786508.0A EP4048450B1 (de) | 2019-10-25 | 2020-10-01 | Siebzylinder |
| CN202080074477.8A CN114616057B (zh) | 2019-10-25 | 2020-10-01 | 筛筒 |
| JP2022523963A JP2022553727A (ja) | 2019-10-25 | 2020-10-01 | スクリーンシリンダ |
| PL20786508.0T PL4048450T3 (pl) | 2019-10-25 | 2020-10-01 | Cylinder przesiewacza |
| FIEP20786508.0T FI4048450T3 (fi) | 2019-10-25 | 2020-10-01 | Seulasylinteri |
| US17/718,848 US11839901B2 (en) | 2019-10-25 | 2022-04-12 | Screening cylinder |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019128878.9A DE102019128878B3 (de) | 2019-10-25 | 2019-10-25 | Siebzylinder |
| DE102019128878.9 | 2019-10-25 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US17/718,848 Continuation US11839901B2 (en) | 2019-10-25 | 2022-04-12 | Screening cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021078490A1 true WO2021078490A1 (de) | 2021-04-29 |
Family
ID=71524349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2020/077554 Ceased WO2021078490A1 (de) | 2019-10-25 | 2020-10-01 | Siebzylinder |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US11839901B2 (de) |
| EP (1) | EP4048450B1 (de) |
| JP (1) | JP2022553727A (de) |
| KR (1) | KR20220084177A (de) |
| CN (1) | CN114616057B (de) |
| DE (1) | DE102019128878B3 (de) |
| FI (1) | FI4048450T3 (de) |
| PL (1) | PL4048450T3 (de) |
| WO (1) | WO2021078490A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018007294A1 (de) * | 2018-09-14 | 2020-03-19 | Guntram Krettek | Verfahren zum Fixieren eines Bleches und damit hergestellte Filtereinrichtung |
| DE102023116196B3 (de) | 2023-06-21 | 2024-12-12 | Voith Patent Gmbh | Siebkorb und Siebkörbeverbund |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4846971A (en) * | 1984-11-12 | 1989-07-11 | E&M Lamort | Sieves for scrubbers and their method of manufacture |
| US5968357A (en) * | 1998-08-27 | 1999-10-19 | Voith Sulzer Paper Technology North America, Inc. | Screen basket having a removable and replaceable cylindrical mesh liner |
| DE102006007660A1 (de) | 2006-02-22 | 2007-08-23 | Voith Patent Gmbh | Verfahren zur Herstellung einer rotations-symmetrischen, insbesondere zylindrischen Siebvorrichtung |
| US20110005981A1 (en) * | 2005-05-09 | 2011-01-13 | Filtration Fibrewall Inc. | Screen basket with replaceable profiled bars |
| EP3143198A1 (de) | 2014-05-15 | 2017-03-22 | Voith Patent GmbH | Verfahren zur herstellung einer siebvorrichtung |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4435538C2 (de) * | 1994-10-05 | 1996-10-02 | Voith Gmbh J M | Verfahren zur Herstellung eines Flachsiebes |
| JPH08209574A (ja) * | 1995-01-27 | 1996-08-13 | Aikawa Iron Works Co Ltd | 製紙用のスクリーンプレート |
| US5791495A (en) * | 1996-03-11 | 1998-08-11 | Beloit Technologies, Inc. | Paper pulp screen cylinder |
| DE19651643A1 (de) * | 1996-12-12 | 1998-06-18 | Voith Sulzer Stoffaufbereitung | Siebvorrichtung mit spaltförmigen Öffnungen |
| JP3286592B2 (ja) * | 1997-12-25 | 2002-05-27 | 相川鉄工株式会社 | 製紙用スクリーン装置 |
| US6491168B1 (en) * | 2000-04-23 | 2002-12-10 | J + L Fiber Services, Inc. | Pulp screen basket |
| JP3825245B2 (ja) * | 2000-11-10 | 2006-09-27 | 三菱重工業株式会社 | 紙料精選スクリーン用スクリンシリンダ |
| DE10065930B4 (de) | 2000-12-22 | 2006-05-18 | Voith Paper Patent Gmbh | Verfahren zur Herstellung von Sieben, die zur Nasssiebung von Papierfasersuspensionen verwendbar sind |
| CN2455755Y (zh) * | 2000-12-26 | 2001-10-24 | 温州银翼造纸筛选设备有限公司 | 高强度斜缝筛鼓结构 |
| DE102006007600B4 (de) | 2006-02-18 | 2016-12-15 | Leopold Kostal Gmbh & Co. Kg | Drehsteller für elektrische oder elektronische Gräte in einem Kraftfahrzeug |
| WO2015180955A1 (de) * | 2014-05-28 | 2015-12-03 | Voith Patent Gmbh | Sieb |
| CN207086273U (zh) * | 2017-08-22 | 2018-03-13 | 昆明茨坝矿山机械有限公司 | 一种篦式筛板装置 |
| DE102017129752A1 (de) * | 2017-12-13 | 2019-06-13 | Voith Patent Gmbh | Siebherstellverfahren |
-
2019
- 2019-10-25 DE DE102019128878.9A patent/DE102019128878B3/de active Active
-
2020
- 2020-10-01 JP JP2022523963A patent/JP2022553727A/ja active Pending
- 2020-10-01 CN CN202080074477.8A patent/CN114616057B/zh active Active
- 2020-10-01 WO PCT/EP2020/077554 patent/WO2021078490A1/de not_active Ceased
- 2020-10-01 EP EP20786508.0A patent/EP4048450B1/de active Active
- 2020-10-01 FI FIEP20786508.0T patent/FI4048450T3/fi active
- 2020-10-01 PL PL20786508.0T patent/PL4048450T3/pl unknown
- 2020-10-01 KR KR1020227017760A patent/KR20220084177A/ko not_active Ceased
-
2022
- 2022-04-12 US US17/718,848 patent/US11839901B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4846971A (en) * | 1984-11-12 | 1989-07-11 | E&M Lamort | Sieves for scrubbers and their method of manufacture |
| US5968357A (en) * | 1998-08-27 | 1999-10-19 | Voith Sulzer Paper Technology North America, Inc. | Screen basket having a removable and replaceable cylindrical mesh liner |
| US20110005981A1 (en) * | 2005-05-09 | 2011-01-13 | Filtration Fibrewall Inc. | Screen basket with replaceable profiled bars |
| DE102006007660A1 (de) | 2006-02-22 | 2007-08-23 | Voith Patent Gmbh | Verfahren zur Herstellung einer rotations-symmetrischen, insbesondere zylindrischen Siebvorrichtung |
| EP3143198A1 (de) | 2014-05-15 | 2017-03-22 | Voith Patent GmbH | Verfahren zur herstellung einer siebvorrichtung |
Also Published As
| Publication number | Publication date |
|---|---|
| US20220234076A1 (en) | 2022-07-28 |
| FI4048450T3 (fi) | 2024-03-15 |
| JP2022553727A (ja) | 2022-12-26 |
| CN114616057B (zh) | 2024-04-09 |
| EP4048450A1 (de) | 2022-08-31 |
| EP4048450B1 (de) | 2023-12-13 |
| CN114616057A (zh) | 2022-06-10 |
| US11839901B2 (en) | 2023-12-12 |
| PL4048450T3 (pl) | 2024-06-10 |
| KR20220084177A (ko) | 2022-06-21 |
| DE102019128878B3 (de) | 2020-07-30 |
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