US3773614A - Drum comprising support mounted grid structure - Google Patents

Drum comprising support mounted grid structure Download PDF

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Publication number
US3773614A
US3773614A US00195953A US3773614DA US3773614A US 3773614 A US3773614 A US 3773614A US 00195953 A US00195953 A US 00195953A US 3773614D A US3773614D A US 3773614DA US 3773614 A US3773614 A US 3773614A
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US
United States
Prior art keywords
support
strip means
grid structure
waved
drum
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
Application number
US00195953A
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English (en)
Inventor
R Pennington
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.)
Improved Machinery Inc
Original Assignee
Improved Machinery Inc
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.)
Filing date
Publication date
Application filed by Improved Machinery Inc filed Critical Improved Machinery Inc
Application granted granted Critical
Publication of US3773614A publication Critical patent/US3773614A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/06—Rotary screen-drums
    • 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
    • B01D33/067—Construction of the filtering drums, e.g. mounting or sealing arrangements
    • 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
    • B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
    • 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
    • D21F1/60—Cylinder moulds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders

Definitions

  • ABSTRACT A drum comprising an annular, perforated, rigid support and an annular honeycomb or grid structure mounted circumferentially around the support.
  • the grid structure includes planar strip means extending circumferentially of the support providing the drum with substantial circumferential rigidity; and the support provides the drum with substantial longitudinal stiffness.
  • the present invention relates to drums formed from annular honeycomb or grid structures such as, for example, employed by the pulp and paper making industry.
  • Drums of this general type are capable of employment in a wide variety of applications including, by way of illustration, the filtering of slurries and the air drying of paper.
  • these drums sometimes have been constructed from strip material arranged to longitudinally extend length-wise of the drums, but more preferably have been formed from circumferentially wound strip material as this latter construction provides the drums with significantly greater circumferential strength and rigidity.
  • Drums of this latter, more advantageous, construction are, for example, disclosed in U.S. Pat. Nos. 3,105,043 and 3,320,399, both assigned to the assignee of the present invention, which describe drums formed from circumferentially wound, alternately arranged planar and waved strips welded one to the other.
  • the principal object of the present invention is to provide a new and improved drum including honeycomb or grid structure, which drum is particularly constructed and arranged to possess both substantial circumferential rigidity and substantial longitudinal stiffness.
  • Another object of the invention is to provide a new and improved drum of the type set forth which, although including circumferentially wound strip material, is particularly constructed and arranged to avoid the necessity for reliance on the welded interconnections of the strip material to provide the drum with longitudinal stiffness.
  • Another object is to provide a new and improved drum of the type set forth which is relatively simple and economical in manufacture.
  • a drum may comprise an annular, rigid support having openings through its thickness and an annular grid structure mounted circumferentially around the support with its inner circumference on the outer circumference of the support, the grid structure including waved strip means extending around the circumference of the support and planar strip means longitudinally extending around the circumference of said support alternately arranged with the waved strip means, and the waved strip means and the planar strip means being interconnected and cooperating to define openings through the grid structure in communication with the openings in the support.
  • FIG. 1 is a view in perspective, partially broken away and in section, illustrating one drum embodying the invention.
  • FIG. 2 is an enlarged, fragmentary top or plan view of the drum of FIG. 1 showing details of the construction of the grid structure of the drum.
  • the illustrated drum comprises a rigid, cylindrical support or shell 10 perforated to include openings 12 radially through its thickness at spaced locations throughout its length and armate extent.
  • the support 10 is formed from steel or other similar enduring material of significant strength and is of a substantial thickness at the minimum about onesixteenth of an inch.
  • the openings 12 are unrestricted and of relatively large cross-sectional diameter to freely permit fluid flow to-and-from the interior of the support 10, the total cross-sectional area of the openings 12 normally being at least about 20 percent of the outer circumference of the support 10.
  • the ends of the support 10 are closed by end closure plates 14, welded or otherwise affixed to the support 10, which carry integral stub shafts 16 adapted for rotatably mounting the ends of the support 10.
  • the end plates 14 are of diameters substantially greater than the support 10 to have their annular outer circumferences radially outwardly of the outer circumference of the support 10; and one of the stub shafts 16 is hollow and contains a conduit 18 through which fluid may be drained from the interior of the support 10 or supplied to the latter, depending on the particular application in which the drum is employed.
  • a cylindrical honeycomb or grid structure shown fragmentarily in the drawings as 20, is mounted around the outer circumference of the support 10 with its inner circumference directly supported by the outer circumference of the latter.
  • the grid structure 20 is, per se, of construction described in the aforementioned U.S. Pat. No. 3,105,043 and includes sheet metal, planar and waved strips 22, 24, respectively, which are helically wound around the support 10 in alternate arrangement throughout the length of the latter.
  • the strips 22, 24 are arranged with their greatest transverse or widthwise dimensions radially of the support 10 and of the grid structure 20; and, as illustrated, are of such transverse dimensions that the outer circumference of the grid structure 20 is aligned with the outer circumferences of the end closure plates 14.
  • the strips 22, 24 cooperate to provide the grid structure 20 with a plurality of therebetween openings 26 generally radially through the thickness of the grid structure 20 in communication with the openings 12- in the support 10, the openings 26 providing the grid structure 20 with a total open area which may be in the range of percent to percent of its total circumferential area.
  • the waved strip 24 is preferably formed to comprise straight parallel connecting portions 28, alternately arranged on the opposite sides of its central plane 30, and diagonal portions 32 extending transversely to such central plane 30 interconnecting the portions 28.
  • the portions 28 may, if desired, be formed of truncated triangular construction as described in U.S. Pat. No. 3,105,043.
  • the inherent longitudinal strength or stiffness of the support 10 provides the aforedescribed drum with significant longitudinal stiffness, thus causing the welds interconnecting the strips 22, 24 to function solely to interconnect the strips and maintaining such welds substantially unstressed during the employment of the drum.
  • the inherent longitudinal rigidity of the circumferentially wound planar strip 22 provides the drum with notable circumferential rigidity.
  • the drum may be advantageously manufactured by a method of the type described in co-pending U. S. Pat. application Ser. No. 196,074 entitled METHOD OF MAKING ANNULAR GRID STRUCTURE which was filed by Lawrence A. Carlsmith on the filing date of this application.
  • the support would be employed as the rotatably driven mandrel and, as described in the aforesaid co-pending patent application, the strips 22, 24 would be helically wound around the support 10 in alternate fashion whereby the planar strip 22 is wound tightly around the support 10 and the wound strips cooperate to progressively form an axial build-up of the grid structure around the support 10.
  • Adjacent coils of the strips 22, 24 would be interconnected, such as by welding, during the winding such that the planar strip 22 is during the welding substantially heated at the locations of the welds while tightly wound around the support 10. Then, the heated tightly wound planar strip 22 would be allowed to cool while around the support 10. If desired, the strips 22, 24 may be welded along their inner circumferences to the outer circumference of the support 10.
  • the drum provided by the invention is capable of employment in a wide variety of applications both in the pulp and paper making industry and elsewhere.
  • the drum with a covering circumferential filter screen if the openings 26 be too large to serve as filtering openings or without such covering screen if the openings 26 be sufficiently small to function as filtering openings is readily employable as a rotatably driven filter drum for filtering a slurry such as, by way of illustration, a pulp suspension or an effluent sludge.
  • a slurry such as, by way of illustration, a pulp suspension or an effluent sludge.
  • the drum provided by the invention is capable of employment in the air drying of a paper web passed circumferentially thereover in which event moist air can either be discharged from the interior of the support through the conduit 18 or, alternatively, the drying air can be supplied through such conduit 18 and the interior of the support 10 and communicating openings 12,26.
  • the drum of the invention either with or without a circumferential cover around the grid structure 20, could be employed as a supporting roll.
  • a drum comprising an annular, rigid support having openings through its thickness and an annular grid structure mounted circumferentially around said support with its inner circumference directly supported by the outer circumference of said support, said grid structure including waved strip means extending around the circumference of said support and planar strip means longitudinally extending around the circumference of said support alternately arranged with said waved strip means, and said waved strip means and said planar means being interconnected and cooperating to define openings through said grid structure in communication with said openings in said support.
  • said waved strip means includes alternating generally diagonal segments and therebetween connecting segments on opposite sides of the central plane of said waved strip means, said connecting segments being connected to said planar strip means and said diagonal segments crossing said central plane of said waved strip means.
  • a drum according to claim 1 further comprising end closure means closing the ends of said support, said end closure means including annular outer peripheries aligned with the outer circumference of said grid structure.
  • said grid structure consists only of said waved strip means and said planar strip means, said support is of a radial thickness at least about one-sixteenth of an inch, the openings in said support provide said support with at least 20 percent open area, and said waved and planar strip means are helically wound around said support, and further comprising end closure means closing the ends of said support, said end closure means including annular outer peripheries aligned with the outer circumference of said grid structure.
  • said waved strip means includes alternating generally diagonal segments and therebetween connecting segments on opposite sides of the central plane of said waved strip means, said connecting segments being connected to said planar strip means and said diagonal segments crossing said central plane of said waved strip means.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
US00195953A 1971-11-05 1971-11-05 Drum comprising support mounted grid structure Expired - Lifetime US3773614A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19595371A 1971-11-05 1971-11-05

Publications (1)

Publication Number Publication Date
US3773614A true US3773614A (en) 1973-11-20

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ID=22723509

Family Applications (1)

Application Number Title Priority Date Filing Date
US00195953A Expired - Lifetime US3773614A (en) 1971-11-05 1971-11-05 Drum comprising support mounted grid structure

Country Status (5)

Country Link
US (1) US3773614A (de)
JP (1) JPS57399B2 (de)
BR (1) BR7207610D0 (de)
CA (1) CA974106A (de)
DE (1) DE2253947A1 (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811130A (en) * 1970-11-13 1974-05-21 C Townsend Headwear construction
US3913240A (en) * 1973-11-24 1975-10-21 Voith Gmbh J M Sieve roll for use in paper drying apparatus or the like
US3957087A (en) * 1974-07-03 1976-05-18 Johnston Henry M Pin and truss cylinder construction
US4038187A (en) * 1976-02-03 1977-07-26 Envirex Inc. Microscreen drum
USRE29452E (en) * 1972-10-12 1977-10-25 Headwear construction
US4066555A (en) * 1976-05-06 1978-01-03 Pascale Joseph A Rotary filter
US4106980A (en) * 1977-05-11 1978-08-15 The Black Clawson Company Thickener apparatus including a shaftless cylinder mold
US4146428A (en) * 1976-10-13 1979-03-27 Hermann Finckh Maschinenfabrik Suction roll for paper machines
US4973385A (en) * 1990-04-24 1990-11-27 Jean Ming Gwo Vacuum water drawing cylinder for making paper
US5480545A (en) * 1994-08-03 1996-01-02 Ingersoll-Rand Company Cross braced vacuum washer
WO1998027274A1 (en) * 1996-12-16 1998-06-25 Valmet Corporation Roll for a paper machine, in particular for a paper drying device, and dryer group for a paper machine
WO1999024143A1 (en) * 1997-11-12 1999-05-20 Thermo Black Clawson Inc. Composite screen
US5996244A (en) * 1996-12-16 1999-12-07 Valmet Corporation Roll for a paper machine, in particular for a paper drying device, and dryer group for a paper machine
US20020148763A1 (en) * 2001-04-16 2002-10-17 Lutz Mark S. Screen cylinder and method
US20050283994A1 (en) * 2004-06-28 2005-12-29 Wilhelm Mausser Device for continuous drying of a pulp web
US20060122384A1 (en) * 2004-11-02 2006-06-08 Shin-Etsu Chemical Co., Ltd. Method of separating water-soluble cellulose ether
WO2009038529A1 (en) * 2007-09-19 2009-03-26 Andritz Oy Device for dewatering of pulp
WO2010018120A2 (de) * 2008-08-11 2010-02-18 Voith Patent Gmbh Fraktionieranordnung
US20160145804A1 (en) * 2013-07-05 2016-05-26 Voith Patent Gmbh Drying roller and a method for the production of same
WO2016207143A1 (en) * 2015-06-23 2016-12-29 Veolia Water Solutions & Technologies Support Filter panel with structures support grid and drum filter with said filter panel

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3618672A1 (de) * 1986-06-03 1987-12-10 Wandel Gmbh & Co Chr Siebzylinder
JPS63249529A (ja) * 1987-04-03 1988-10-17 株式会社エヌ・イー 人体乾燥装置
DE4018890A1 (de) * 1990-06-13 1991-12-19 Emil Holz Walze fuer papiermaschinen
US5823355A (en) * 1995-03-29 1998-10-20 Beloit Technologies, Inc. Fibresaver screen basket support

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811130A (en) * 1970-11-13 1974-05-21 C Townsend Headwear construction
USRE29452E (en) * 1972-10-12 1977-10-25 Headwear construction
US3913240A (en) * 1973-11-24 1975-10-21 Voith Gmbh J M Sieve roll for use in paper drying apparatus or the like
US3957087A (en) * 1974-07-03 1976-05-18 Johnston Henry M Pin and truss cylinder construction
US4038187A (en) * 1976-02-03 1977-07-26 Envirex Inc. Microscreen drum
US4066555A (en) * 1976-05-06 1978-01-03 Pascale Joseph A Rotary filter
US4146428A (en) * 1976-10-13 1979-03-27 Hermann Finckh Maschinenfabrik Suction roll for paper machines
US4106980A (en) * 1977-05-11 1978-08-15 The Black Clawson Company Thickener apparatus including a shaftless cylinder mold
US4973385A (en) * 1990-04-24 1990-11-27 Jean Ming Gwo Vacuum water drawing cylinder for making paper
US5480545A (en) * 1994-08-03 1996-01-02 Ingersoll-Rand Company Cross braced vacuum washer
WO1998027274A1 (en) * 1996-12-16 1998-06-25 Valmet Corporation Roll for a paper machine, in particular for a paper drying device, and dryer group for a paper machine
US5996244A (en) * 1996-12-16 1999-12-07 Valmet Corporation Roll for a paper machine, in particular for a paper drying device, and dryer group for a paper machine
AT409871B (de) * 1996-12-16 2002-12-27 Valmet Corp Walze für eine papiermaschine, insbesondere für eine papiertrocknungsvorrichtung, und trocknergruppe für eine papiermaschine
WO1999024143A1 (en) * 1997-11-12 1999-05-20 Thermo Black Clawson Inc. Composite screen
US6105788A (en) * 1997-11-12 2000-08-22 Thermo Black Clawson Inc. Composite screen
US20020148763A1 (en) * 2001-04-16 2002-10-17 Lutz Mark S. Screen cylinder and method
US6915910B2 (en) 2001-04-16 2005-07-12 J&L Fiber Services, Inc. Screen cylinder and method
US7690131B2 (en) * 2004-06-28 2010-04-06 Andritz Ag Device for continuous drying of a pulp web
US20050283994A1 (en) * 2004-06-28 2005-12-29 Wilhelm Mausser Device for continuous drying of a pulp web
US20060122384A1 (en) * 2004-11-02 2006-06-08 Shin-Etsu Chemical Co., Ltd. Method of separating water-soluble cellulose ether
US8324377B2 (en) * 2004-11-02 2012-12-04 Shin-Etsu Chemical Co., Ltd. Method of separating water-soluble cellulose ether
WO2009038529A1 (en) * 2007-09-19 2009-03-26 Andritz Oy Device for dewatering of pulp
US20100282664A1 (en) * 2007-09-19 2010-11-11 Jonas Avidson Device for dewatering of pulp
WO2010018120A3 (de) * 2008-08-11 2010-09-16 Voith Patent Gmbh Anordnung zur fraktionierung einer faserstoffsuspension
US20110174698A1 (en) * 2008-08-11 2011-07-21 Bergstroem Jonas Fractionating arrangement
WO2010018120A2 (de) * 2008-08-11 2010-02-18 Voith Patent Gmbh Fraktionieranordnung
US20160145804A1 (en) * 2013-07-05 2016-05-26 Voith Patent Gmbh Drying roller and a method for the production of same
US10066340B2 (en) * 2013-07-05 2018-09-04 Voith Patent Gmbh Drying roller and a method for the production of same
US10676866B2 (en) 2013-07-05 2020-06-09 Voith Patent Gmbh Drying roller and a method for manufacturing the same
WO2016207143A1 (en) * 2015-06-23 2016-12-29 Veolia Water Solutions & Technologies Support Filter panel with structures support grid and drum filter with said filter panel
US10946318B2 (en) 2015-06-23 2021-03-16 Veolia Water Solutions & Technologies Support Filter panel with structures support grid and drum filter with said filter panel

Also Published As

Publication number Publication date
DE2253947A1 (de) 1973-05-10
JPS4856907A (de) 1973-08-10
JPS57399B2 (de) 1982-01-06
CA974106A (en) 1975-09-09
BR7207610D0 (pt) 1973-08-21

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