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WO2001045867A1 - Tamis a barres - Google Patents

Tamis a barres Download PDF

Info

Publication number
WO2001045867A1
WO2001045867A1 PCT/AU2000/001211 AU0001211W WO0145867A1 WO 2001045867 A1 WO2001045867 A1 WO 2001045867A1 AU 0001211 W AU0001211 W AU 0001211W WO 0145867 A1 WO0145867 A1 WO 0145867A1
Authority
WO
WIPO (PCT)
Prior art keywords
panel
apertures
rider bars
rider
adjacent
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
Application number
PCT/AU2000/001211
Other languages
English (en)
Inventor
Scott A. Taylor
Lindsay Maloney
John R. Anderson
Geoffrey J. Dowding
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.)
Melwire Pty Ltd
Original Assignee
Melwire Pty Ltd
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 Melwire Pty Ltd filed Critical Melwire Pty Ltd
Priority to AU78903/00A priority Critical patent/AU770500B2/en
Publication of WO2001045867A1 publication Critical patent/WO2001045867A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B07B1/46—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
    • B07B1/4681—Meshes of intersecting, non-woven, elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
    • B01D29/445—Bar 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/08—Parts thereof
    • F26B25/10—Floors, roofs, or bottoms; False bottoms

Definitions

  • This invention relates to a screen panel for a screening machine and in particular to screen panels for screening of fines such as coal fines and also for de atering applications .
  • the object of the present invention is to provide a rider bar screen panel which overcomes these problems and is useful in the screening of fines and in particular coal fines and for dewatering applications.
  • the invention may be said to reside in a screen panel for screening of fines or for dewatering of material, including; a plurality of rider bars arranged in side by side relationship and defining spaces therebetween for the screening of the fines or for the flow of water between the rider bars; the spaces between adjacent rider bars defining apertures with an aperture size of the apertures being defined by the distance between points on adjacent rider bars which are closest together; and a head portion on each rider bar extending upwardly, having regard to the orientation of the screen panel when located on a screening machine, from the plane of the apertures, the head portion being curved so that the space between adjacent head portions and above the apertures tapers outwardly from the apertures .
  • the apertures are defined below the uppermost extremity of the rider bars and have a lead in channel defined by the curved profile above the apertures .
  • the panel according to the invention provides for greater wear life because any wear of the rider bars takes place above the aperture and therefore wear of the rider bars does not alter the aperture size thereby increasing the life expectancy of the panel.
  • the curved profile provides a lead in channel for material or water to find the aperture and also provides minimal point contact of particles thus preventing excessive blinding or pegging as particles larger than the aperture size can easily dislodge themselves and are also tended to be reflected away from the aperture in view of the curved profile of the head portion rather than becoming stuck in the aperture or the channel which leads into the aperture .
  • the head portion is dome shaped.
  • Host preferably the dome shape is provided by a semicircular profile in cross-section perpendicular to the longitudinal axis of the rider bars.
  • the rider bars are interconnected by a plurality of support members which extend transverse with respect to the rider bars .
  • the rider bars have a lower portion below the plane of the apertures which are defined by side surfaces which taper towards one another so that the space between adjacent lower portions tapers outwardly from a position adjacent the apertures to a lowermost extremity of the lower portion of the rider bars.
  • the screen panels have connection means for connecting the screen panels to a screening machine.
  • connection means may comprise semi-circular recesses and semi-circular bush members on sides of the screen panels so that when two screen panels are placed in side by side relationship the recesses and bushes form an opening through which a pin can be connected so as to couple the screen panels to a screening machine.
  • connection may also be used including the deformable legs or rails on the screen panels which are deformed by a retaining member inserted between panels so that the deformable legs or rails engage a frame member of the screening machine to lock the panels to the screening machine .
  • Figure 1 is a plan view of a screen panel, according to the preferred embodiment of the invention.
  • Figure 2 is a view from beneath of the screen panel of Figure 1;
  • Figure 3 is a cross-sectional view along the line 3-3 of Figure 1;
  • Figure 4 is an enlarged view of part of the cross-section shown in Figure 3.
  • Figure 5 is a cross-sectional view through an embodiment of the invention.
  • a screen panel 10 is shown which is defined by a plurality of rider bars 12.
  • the rider bars 12 extend generally parallel with respect to one another and are interconnected by support members 14 which extend perpendicular to the rider bars 12.
  • the support members 14 and rider bars 12 can be formed in a single moulding operation from polyurethane material .
  • the screen panel 10 may have a peripheral frame section (not shown in Figure 1) which includes connecting members for enabling connection of the screen panel to a screening machine.
  • connection members are well known and therefore need not be fully described in detail herein. Suffice to say that such connection members can include semi-circular recesses and semi-circular bosses which, when two panels are connected together form openings through which a pin can pass to secure the panel to a screening machine (not shown) , or deformable leg members on the periphery of the panel which, when two panels are located in side by side relationship define a space for receiving a retaining member which deflects the leg members beneath rail members on the screening machine to lock the panel to the screening machine .
  • the rider bars 12 have a domed head 16 which is preferably, in cross-section perpendicular to the longitudinal axis of the rider bars 12, semi-circular in shape.
  • the domed head 16 define curved profiles 17 which are adjacent one another in adjacent rider bars 12 so that the curved profiles 17 define a lead in channel for particulate material or for water which leads into space 20 defined between the rider bars 12.
  • the space 20 between two adjacent rider bars 12 defines an aperture through fines below a predetermined size can pass so that those fines can be separated from other material by the screen panel 10.
  • the aperture size is defined by points on adjacent rider bars 12 which are closest together as shown by the points A in Figure 4.
  • the rider bars 12 shown in Figure 4 define an aperture 12 between the points A which is of a predetermined size such as 1.25 mm, for example, for the screening of coal fines.
  • the aperture 22 is positioned below the uppermost extremity 24 of the rider bars 12 and is close to upper surface 28 of the support member 14. In some embodiments, and if desired, the aperture 22 may in fact be substantially level with the upper surface 28 of the support members 14.
  • the space 20 between adjacent rider bars 12 below the aperture 22 is defined by side walls 30 of two adjacent rider bars 12. As clearly shown in Figure 4 the side walls 30 of each rider bar 12 taper inwardly from the aperture 22 to a lowermost extremity 34 of the rider bars. Thus, a lower portion 25 of the rider bars 12 below the domed head 16 is of generally fustro-conical shape and the space 20 below the aperture 22 tapers outwardly from the aperture 22 to the lowermost extremity 34 of the rider bars 12.
  • the rider bars 12 are firmly supported by the support members 14 and form generally rigid structures which do not bend or flex thereby maintaining the predetermined size of the aperture 22.
  • particulate materials such as coal fines is applied to the screen panels 10 and the screening machine on which the screen panels 10 operated so that the panels 10 generally vibrate or oscillate on the machine the fines which are below the aperture sides 22 (that is have a size of generally less than 1.25 mm) pass through the apertures 22 whilst larger particles are retained above the screen panels 10 for collection at one side of the screening machine .
  • the configuration of the rider bars 12 shown in Figure 4 provides protection to the size of the aperture 22 by keeping larger particles away from the aperture 22 and also allows for greater wear life as wearing of the panel will occur at the uppermost extremity of the domed head 16 or at least above the aperture 22 thereby increasing the life expectancy of the panels without deterioration of the aperture size 22.
  • the curved profile 17 between adjacent rider bars 12 provided by the domed head 16 provides a lead in channel for material and moisture to find the aperture 22.
  • the curved profile also provides minimal point contact of the particles thus preventing excessive blinding or pegging of the aperture 22 as large particles can easily dislodge themselves in view of the curved configuration of the head 16 of the rider bars 12.
  • blinding or pegging is also prevented because particles which contact the curved profile 17 during operation of the screening machine rather than becoming stuck in the space 20 between the domed heads 16 of adjacent rider bars 12 will tend to bounce off the curved profile 17 away from the aperture 22.
  • the curved profile 17 do not provide ledges or shoulders on which larger particles can become stuck which would tend to blind the aperture 22.
  • Figure 5 shows a cross-sectional view through an embodiment of the invention which includes the outer peripheral frame and the connection means for connection to a frame of a screening machine.
  • the screening machine has elongate rails 60 which have upwardly extending arms 61.
  • the panels 10 are configured in the same manner as described with reference to Figures 1 to 4 except that the support members 14 are provided with reinforcing ribs 44 which extend transversely and interconnect the support members 14.
  • a reinforcing frame 50 formed from metal and material may be embedded in the panel 10 and includes longitudinal rail members 54 which extend within the support members 14 and transverse members 52 which extend within the reinforcing ribs 44.
  • Peripheral portion 59 of the panel 10 has legs 63 which engage one of the arms 61 of the rails 60. When an elongate retaining member 62 is inserted between adjacent panels the leg 63 is deformed so that it engages beneath the arm 61 to prevent the panel 10 from being separated from the rail 60.
  • Full details of the connection system shown in Figure 5 are disclosed in Australian patent application 96986/98 the contents of which is incorporated into this specification by this reference.
  • the panels 10 are moulded from polyurethane material and in particular a polyether or polyester material with durometer 80 to 95A.
  • the panels could be made from metal, wire or other suitable material depending on the intended application. Since modifications within the spirit and scope of the invention may readily be effected by persons skilled within the art, it is to be understood that this invention is not limited to the particular embodiment described by way of example hereinabove .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

L'invention concerne un tamis à barres pour un tamiseur qui tamise les fines, telles que les fines de charbon, et qui peut s'appliquer à la déshydratation de matériau. Ledit tamis (10) comprend des barres (12) disposées côte à côte et présentant une tête bombée (16). L'ouverture dudit tamis est délimitée entre les barres adjacentes, en un point sur les barres au niveau duquel elles sont les plus près les unes des autres. L'extrémité arrondie (16) s'étend vers le haut depuis le plat (28) des ouvertures et est courbe (17), de manière que l'espace entre les têtes bombées adjacentes (16) et au-dessus des ouvertures (22) soit conique vers l'extérieur des ouvertures (22).
PCT/AU2000/001211 1999-12-20 2000-10-05 Tamis a barres Ceased WO2001045867A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU78903/00A AU770500B2 (en) 1999-12-20 2000-10-05 Rider bar screen panel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPQ4764A AUPQ476499A0 (en) 1999-12-20 1999-12-20 Rider bar screen panel
AUPQ4764 1999-12-20

Publications (1)

Publication Number Publication Date
WO2001045867A1 true WO2001045867A1 (fr) 2001-06-28

Family

ID=3818903

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2000/001211 Ceased WO2001045867A1 (fr) 1999-12-20 2000-10-05 Tamis a barres

Country Status (2)

Country Link
AU (1) AUPQ476499A0 (fr)
WO (1) WO2001045867A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003076042A1 (fr) * 2002-03-08 2003-09-18 Weatherford/Lamb, Inc. Panneau-ecran et son procede de fabrication
WO2003086578A1 (fr) * 2002-04-11 2003-10-23 General Kinematics Corporation Procede de separation de liquide d'une matiere solide chargee de liquide
WO2006130062A1 (fr) * 2005-05-31 2006-12-07 Sandvik Intellectual Property Ab Agencement de criblage
US7303078B2 (en) 2003-05-30 2007-12-04 Weatherford/Lamb, Inc. Screen panel
US8281933B2 (en) 2004-12-23 2012-10-09 Metso Minerals (Wear Protection) Ab Rider bar for screening element or wear-resistant lining

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1491802A (en) * 1920-04-05 1924-04-29 Sprague Canning Machinery Comp Grate for grading machines
US2443176A (en) * 1945-02-21 1948-06-15 Us Interior V-opening screen
US3134733A (en) * 1961-01-09 1964-05-26 Bixby Zimmer Engineering Compa Screens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1491802A (en) * 1920-04-05 1924-04-29 Sprague Canning Machinery Comp Grate for grading machines
US2443176A (en) * 1945-02-21 1948-06-15 Us Interior V-opening screen
US3134733A (en) * 1961-01-09 1964-05-26 Bixby Zimmer Engineering Compa Screens

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003076042A1 (fr) * 2002-03-08 2003-09-18 Weatherford/Lamb, Inc. Panneau-ecran et son procede de fabrication
WO2003086578A1 (fr) * 2002-04-11 2003-10-23 General Kinematics Corporation Procede de separation de liquide d'une matiere solide chargee de liquide
US7108793B2 (en) 2002-04-11 2006-09-19 General Kinematics Corporation Method of separating liquid from liquid laden solid material
US7186347B2 (en) 2002-04-11 2007-03-06 General Kinematics Corporation Vibratory apparatus for separating liquid from liquid laden solid material
US7303078B2 (en) 2003-05-30 2007-12-04 Weatherford/Lamb, Inc. Screen panel
US7516850B2 (en) 2003-05-30 2009-04-14 Weatherford/Lamb, Inc. Screen panel
US8281933B2 (en) 2004-12-23 2012-10-09 Metso Minerals (Wear Protection) Ab Rider bar for screening element or wear-resistant lining
WO2006130062A1 (fr) * 2005-05-31 2006-12-07 Sandvik Intellectual Property Ab Agencement de criblage
US8066126B2 (en) 2005-05-31 2011-11-29 Sandvik Intellectual Property Ab Screening arrangement

Also Published As

Publication number Publication date
AUPQ476499A0 (en) 2000-02-03

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