US3429256A - Apparatus for separating the components of a suspension - Google Patents

Apparatus for separating the components of a suspension Download PDF

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Publication number
US3429256A
US3429256A US544786A US54478666A US3429256A US 3429256 A US3429256 A US 3429256A US 544786 A US544786 A US 544786A US 54478666 A US54478666 A US 54478666A US 3429256 A US3429256 A US 3429256A
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US
United States
Prior art keywords
sleeve
perforated
circular
roller
rollers
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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
Application number
US544786A
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English (en)
Inventor
Gilbert Bailleau
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.)
Cellophane Investment Co Ltd
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Cellophane Investment Co Ltd
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Filing date
Publication date
Application filed by Cellophane Investment Co Ltd filed Critical Cellophane Investment Co Ltd
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Publication of US3429256A publication Critical patent/US3429256A/en
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    • 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
    • B30B9/20—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 rotary pressing members, other than worms or screws, e.g. rollers, rings, discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums

Definitions

  • roller presses and generally comprise two turning, cylindrical and parallel pressing rollers having their outside surfaces perforated and provided with screens or perforated plates over these sleeve portions, so that the liquid may pass inside the rollers and be expelled while the solid material is retained and is expressed between the outside surfaces of the rollers.
  • the rollers of these known devices generally comprise a shaft having braces thereon, a perforated sleeve covering this assembly and an outer screen or perforated plate.
  • the perforated plate has been in the form of a single piece and has been applied by conventional means, such as by rolling onto the shaft-brace-sleeve assembly followed by welding thereto.
  • a previous attempted solution to this problem included welding the plate to the sleeve at points on the underside of the plate, however, these points have also failed.
  • Another attempted solution has been to rivet the plate to the sleeve, however, these rivets also fail in that the pressing rollers quickly become deformed and thus yield an irregularly pressed product.
  • a roller press for use in separating liquid from solids by compression which comprises two cooperating rollers having a shaft, braces, perforated sleeve, and outer perforated plate constructed in such a manner that the plate will not become deformed and tear away from the sleeve.
  • Another object of this invention is to provide a method of attaching perforated plates to a sleeve portion of a roller used in a roller press for separating liquid and solid materials whereby the plate will not be deformed by the roller construction and whereby plays will not develop between the plate and the sleeve resulting in tearing away of the plate from the sleeve.
  • a more specific object of the invention is to provide a roller of the type described wherein a plurality of individual perforated plate elements are attached to a perforated sleeve element by means of circular straps having 10 Claims ite States Patent shoulders thereon which have been embedded in the sleeve element.
  • a roller comprising a shaft having bracing elements extending in a radial direction thereon and having a sleeve fitted over the shaft-braces assembly.
  • Said sleeve is provided with lengthwise ribs, crosswise grooves, and orifices extending therethrough, all for the purpose of draining expressed liquid.
  • a number of circular cuts are made around the periphery of the sleeve and a corresponding number of circular straps are placed therein.
  • the circular straps are machined to provide a rib portion and two shoulder portions.
  • a number of individual perforated plate elements are then attached to the circular straps as by welding, and the ends of each individual strap is then welded along the generatrix.
  • This system allows the plates to be attached to the sleeves in a closely fitted relationship avoiding any play therebetween and provides stronger means for attaching the plate. Since the attachment is stronger, the rollers avoid tearing of the plates and produce a more uniform product. This increased strength is seen to result as a consequence of attaching a number of narrow plates continuously on both edges thereof and at the ends thereof, as opposed to prior methods of attaching a single wide sheet along the end only, or along the end and at random points.
  • the pressing rollers which are the object of this invention are adapted to treat any liquid-solid suspension but are particularly adapted for treating thick suspensions.
  • a specific application of the invention is in the treatment of alkali cellulose suspensions in the soda used to prepare viscose solutions to make cellulose films, rayon, or rayon staple.
  • Exemplary of a roller useful in the treatment of alkali cellulose suspensions may be a shaft with braces and sleeve thereon whose length is 1.40 meters and whose diameter is 0.6 meter. Attached thereto are six perforated plates having a width of approximately 0.2 meter and a thickness of 15 to 25 millimeters.
  • FIGURE 1 shows schematically, in a plan view, a pressing roller assembly comprising two pressing rollers of the present invention.
  • FIGURE 2 shows schematically, in a sectional view, a pressing roller before it has been machined according to the present invention.
  • FIGURE 3 shows schematically, a partial sectional view of a sleeve contemplated by the present invention.
  • FIGURE 3A shows schematically, an end view of the sleeve of FIGURE 3.
  • FIGURES 4-8 represent sequential steps in the machining of a sleeve and application of outer perforated plates according to the present invention.
  • FIGURE 1 illustrates two pressing rollers 20 and 22.
  • Each roller comprises a number of perforated plate elements 24.
  • Roller 20 is shown with six elements 24 and roller 22 is shown with seven elements 24. It is to be understood that these numbers are not critical, it being possible to vary the number and size of the plate elements as necessary or desirable.
  • the perforated plate elements 24, rest on circular straps 26. The number of straps used will, of course, vary with and depend on the number of plates 24 utilized.
  • Roller 20 carries cheeks 28 which extend beyond roller 20 and onto the adjacent ends of roller 22. These cheeks aid in keeping the expressed solids in a uniform area and also aid in producing a product of uniform size.
  • FIGURE 2 shows one roller in a sectional view, a shaft 30, is provided having braces 32 attached thereto by suitable means, as by welding.
  • a sleeve 34 is fitted on the shaft and brances assembly. Void areas 33 are provided which receive liquid which drains through orifices provided in sleeve portion 34. Orifices are seen in the enlarged section view of sleeve 34 shown in FIGURE 3.
  • Suitable drainage means for the liquid from the voids 33 to a receiving means may be provided, such as by allowing the liquid to flow through channels 31 shown provided through the braces 32.
  • sleeve portion 34 may be seen in FIG- URES 3 and 3A.
  • the sleeve surface is provided with ribs 36 which extend in an axial direction and which form channels 37 connecting with orifices 40 for draining expressed liquid. Ribs 36 are grooved as at 38 in a direction perpendicular to the ribs.
  • a circular cut 42 is made in sleeve portion 34. This cut, as seen in FIGURE 5, does not extend to the depth of grooves 38 in order to allow the liquid to circulate freely through the channels 37 whose bottom is shown by the dotted line on FIGURES 4 to 8.
  • the width of the cut may be varied but it must be as narrow as possible in order to limit the portions where the liquid is expressed with some more difficulty. For yielding regularly pressed product, this width must not exceed mm.
  • the cut 42 extends around the entire periphery of sleeve 34. Into cut groove 42 a circular strap 44 is embedded and attached by suitable means such as by welding.
  • This strap may be machined to provide rib portion 47 and shoulder portions 44 either before or after assembly.
  • the perforated metal plates 48 are attached to the shoulders of the strap by weld seams 50. These plates are perforated, as shown at 52, for drainage purposes.
  • roller press The operation of the roller press is briefly as follows: A liquid suspension containing solid material and liquid is fed upward between the presser rollers and 22. Both rollers 20 and 22 are positively driven and, as described, have checks on their ends which convey the material through the nip of the rollers. Since the rollers are provided with perforated plates and a perforated sleeve, the water is expressed through the plates via perforations 52 and through the sleeve via grooves 38, channels 37, and orifices 40. As shown in FIGURE 1, by supplying a different number of perforated elements on each roller, the straps are not superposed on the two rollers and unnecessarily large pressures on the welds is avoided. By utilizing the above-described novel presser rolls, greater durability of rollers and greater uniformity of product is achieved.
  • a process of making pressing rollers which comprises attaching brace elements on a shaft portion, arranging and attaching a perforated sleeve portion in overlying relationship thereon, machining of circular cuts in said sleeve portion along the entire periphery of said sleeve portion, attaching a circular strap in said circular cuts, and attaching perforated plate elements to said circular straps.
  • a process of making pressing rollers which comprises welding brace elements on a shaft portion, shrinking a perforated sleeve portion in overlying relationship thereon, machining a circular cut in said sleeve portion, spot-welding a circular strap in said circular cut, spotwelding perforated plate elements to said circular strap, joining the ends of each perforated plate element along the starting generatrix with a welding head, and conducting general welding by electric welding in an argon atmosphere.
  • perforated plate elements are attached to the roller by attaching each edge of each plate to the shoulders of the circular straps, and wherein the end of each perforated plate is joined along the starting generatrix.
  • pressing rollers which comprise a shaft, braces attached to said shaft, a perforated sleeve portion overlying the assembly of shaft and braces, said sleeve portion having lengthwise ribs and crosswise grooves on the outer surface thereof, and a plurality of perforated plate elements attached to said sleeve by means of circular straps embedded in the sleeve portion, which straps are provided with shoulders to facilitate attachment of the perforated plate elements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Rolls And Other Rotary Bodies (AREA)
US544786A 1960-11-28 1966-04-25 Apparatus for separating the components of a suspension Expired - Lifetime US3429256A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR17689A FR1457314A (fr) 1960-11-28 1960-11-28 Amélioration aux appareils de séparation des composants d'une suspension

Publications (1)

Publication Number Publication Date
US3429256A true US3429256A (en) 1969-02-25

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Application Number Title Priority Date Filing Date
US544786A Expired - Lifetime US3429256A (en) 1960-11-28 1966-04-25 Apparatus for separating the components of a suspension

Country Status (3)

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US (1) US3429256A (fr)
DE (1) DE1577220B2 (fr)
FR (1) FR1457314A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815256A (en) * 1973-03-12 1974-06-11 Beloit Corp Grooved dryer
US6044980A (en) * 1997-01-30 2000-04-04 J. Houle & Fils Inc. Drum press extractor
US20050230306A1 (en) * 2004-04-19 2005-10-20 Gl&V Management Hungary Kft Perforated deck made out of a plurality of segments

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103552278A (zh) * 2013-11-15 2014-02-05 胡和萍 一种冷榨机的压辊装置
DE102015224001A1 (de) * 2015-12-02 2017-04-13 Hueck Rheinische Gmbh Presswalze mit Pressblech

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2149649A (en) * 1935-08-16 1939-03-07 Eastwood Nealley Corp Covering for dandy rolls, cylindrical molds, or the like for use in paper making machines
US2329469A (en) * 1942-12-08 1943-09-14 Hoe & Co R Slitter roller for use in printing machines
US2808730A (en) * 1953-06-22 1957-10-08 Dodge Mfg Corp Fabricated sheet metal article
US3186063A (en) * 1961-10-02 1965-06-01 Dopp Homer Rodger Method of constructing roll shells

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2149649A (en) * 1935-08-16 1939-03-07 Eastwood Nealley Corp Covering for dandy rolls, cylindrical molds, or the like for use in paper making machines
US2329469A (en) * 1942-12-08 1943-09-14 Hoe & Co R Slitter roller for use in printing machines
US2808730A (en) * 1953-06-22 1957-10-08 Dodge Mfg Corp Fabricated sheet metal article
US3186063A (en) * 1961-10-02 1965-06-01 Dopp Homer Rodger Method of constructing roll shells

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815256A (en) * 1973-03-12 1974-06-11 Beloit Corp Grooved dryer
US6044980A (en) * 1997-01-30 2000-04-04 J. Houle & Fils Inc. Drum press extractor
US20050230306A1 (en) * 2004-04-19 2005-10-20 Gl&V Management Hungary Kft Perforated deck made out of a plurality of segments
US7285180B2 (en) * 2004-04-19 2007-10-23 Gl&V Management Hungary Kft. Perforated deck made out of a plurality of segments

Also Published As

Publication number Publication date
FR1457314A (fr) 1966-11-04
DE1577220A1 (de) 1970-04-09
DE1577220B2 (de) 1975-04-03

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