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WO1997010389A1 - Filtre - Google Patents

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Publication number
WO1997010389A1
WO1997010389A1 PCT/AU1996/000582 AU9600582W WO9710389A1 WO 1997010389 A1 WO1997010389 A1 WO 1997010389A1 AU 9600582 W AU9600582 W AU 9600582W WO 9710389 A1 WO9710389 A1 WO 9710389A1
Authority
WO
WIPO (PCT)
Prior art keywords
filtering members
filter
filtering
members
spaced
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/AU1996/000582
Other languages
English (en)
Inventor
Russell Ball-Guymer
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.)
ACTEW Corp Ltd
Original Assignee
ACTEW Corp 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 ACTEW Corp Ltd filed Critical ACTEW Corp Ltd
Priority to AU69192/96A priority Critical patent/AU6919296A/en
Publication of WO1997010389A1 publication Critical patent/WO1997010389A1/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
    • B07B1/12—Apparatus having only parallel elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B5/00—Artificial water canals, e.g. irrigation canals
    • E02B5/08—Details, e.g. gates, screens
    • E02B5/085—Arresting devices for waterborne materials, e.g. gratings
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
    • E02B8/02—Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material
    • E02B8/023—Arresting devices for waterborne materials
    • E02B8/026—Cleaning devices

Definitions

  • This invention relates to a filter.
  • This invention has particular but not exclusive application to the filtering of potential blockage- causing objects from wastewater streams, and reference will hereunder be made to such use.
  • wastewater streams are reticulated to a treatment site via pipes which are often buried, submerged or otherwise difficult to access.
  • bar screens to filter objects from a wastewater stream with a view to avoiding the above described blockages.
  • Such bar screens use a plurality of parallel and spaced bars which are transversely disposed across the wastewater flow.
  • Bar screens capture many objects which do not present a potential risk of blockage downstream in the pipe. Bar screens quickly become choked with flexible material such as paper and other articles which are generally known in the wastewater treatment art as "rags". This causes a substantial loss of hydraulic head across the screen and necessitates regular flow shutdown and cleaning of the screen. Furthermore, "rags" and other objects recovered during cleaning must then be disposed of.
  • This invention in one aspect resides in a filter including:- a first set of spaced filtering members; and a second set of spaced filtering members, wherein the second set of filtering members are generally opposed to the first set of filtering members and are offset with respect to the first set of filtering members.
  • the spacing of the second set of filtering members corresponds to the spacing of the first set of filtering members.
  • the respective sets of filtering members are interleaved. Most preferably, the respective sets of filtering members are partially interleaved.
  • the opposed filtering members converge in the downstream direction. It is preferred that the opposed filtering members converge smoothly and gradually to avoid “rags” lodging on the filtering members. Preferably, the opposed filtering members converge to be partially interleaved and thereafter diverge.
  • one set of spaced filtering members are mounted on a generally planar mounting means, the mounting means including spaced recesses corresponding to the other set of spaced filtering members.
  • the second set of spaced filtering members are mounted on the generally planar mounting means, the mounting means including spaced recesses corresponding to the first set of spaced filtering members.
  • a circuitous flow path which obstructs passage of long rigid objects which have passed lengthways through the first and second sets of filtering members is disposed downstream of the first and second sets of filtering members.
  • the circuitous flow path is defined by downstream extensions of the surfaces on which the respective filtering members are mounted.
  • the sets of filtering members may be relatively displaced to facilitate cleaning of the filter.
  • the first set of filtering members is pivotably mounted with respect to the second set of filtering members for movement between a filtering position and a cleaning position.
  • the filter includes overflow means including a third set of filtering members and a fourth set of filtering members, the third and fourth sets being generally opposed and interleaved.
  • the third set of filtering members consists of a plurality of parallel and spaced bars, the free ends of the bars interleaving with the fourth set of filtering members.
  • the fourth set of filtering members pivot with the first set of filtering members relative to the second set of filtering members.
  • the invention resides in a filter including:- first filtering means for preventing an elongate inflexible object from passing through sideways; and second filtering means for preventing an elongate inflexible object from passing through lengthways.
  • the first filtering means includes a first set of spaced filtering members and a second set of spaced filtering members and preferably the second filtering means includes a circuitous path.
  • FIG 1 is a exploded perspective view of a filter according to the invention.
  • FIG 2 is an elevational view from a point immediately downstream of the first and second sets of spaced filtering members
  • FIG 3 is a schematic and sectioned side elevational view of the assembled filter of FIG 1;
  • FIG 4 is a schematic and sectioned side elevational view of the assembled filter of FIG 1 shown in cleaning configuration.
  • filter 2 includes a first set of spaced filtering members 4 and a second set of spaced filtering members 6, wherein the second set of filtering members 6 are generally opposed to the first set of filtering members 4 and are offset with respect to the first set of filtering members 4.
  • the respective sets of filtering members are partially interleaved. That is, they overlap such that a long inflexible object can not pass between the respective sets of filtering members sideways. However, a long object could potentially pass lengthways between the first and second sets of filtering members.
  • the opposed filtering members 4 and 6 converge smoothly and gradually in the downstream direction such that "rags” and the like do not lodge on the filtering members.
  • an object strikes a filtering member it is smoothly deflected to the "throat" of the filter whereat the opposed filtering members interleave. Small or flexible objects will pass through the throat whilst large inflexible objects will be trapped.
  • the second set of spaced filtering members 6 are mounted on a generally planar mounting means 24, the mounting means 24 including spaced recesses 8 (see FIG 2) corresponding to, and located opposite of, the first set of spaced filtering members 4.
  • a circuitous flow path 14 (FIG 3) which obstructs passage of long rigid objects which have passed lengthways through the first and second sets of filtering members 4 and 6 is disposed downstream of the first and second sets of filtering members 4 and 6.
  • the circuitous flow path 14 is defined by downstream extensions 26 and 28 of the surfaces on which the respective filtering members are mounted.
  • the filter 2 includes overflow means in the form of a third set of filtering members 10 and a fourth set of filtering members 12, the third and fourth sets being generally opposed and interleaved in a manner similar to the first and second sets of filtering members.
  • the third set of filtering members 10 consists of a plurality of parallel and spaced bars, the free ends of the bars interleaving with the fourth set of filtering members 12.
  • Filtering members 10 are mounted in a grate 36 (FIG 1) which is pivotably mounted in bracket 38 which is mounted to a support (not shown).
  • Second set of filtering members 6 and recesses 8 are disposed on component 18 which also includes spaced side walls 40.
  • the outer surfaces of spaced side walls 40 abut the same support to which bracket 38 is mounted.
  • the support is a vertical concrete wall.
  • Side wall 40 also includes apertures 22 and 32.
  • First set of filtering members 4 are disposed on component 16 which consists of sub-components 16a and 16b which in use are fixed together.
  • Sub-component 16b includes spigot 20 which engages aperture 22 in side wall 40 whereby component 16 may be pivoted relative to component 18 between the filtering configuration illustrated in FIG 3 and the cleaning configuration illustrated in FIG 4.
  • Sub-component 16b also includes a locking bar 30 operable by handle 34 to engage aperture 32 in side wall 40 and fix component 16 in the filtering configuration against rotation relative to component 18.
  • Sub-component 16a is fixed in use to sub-component 16b and includes fourth set of filtering members 12. Downstream extension 28 of sub-component 16b cooperates with downstream extension 26 of component 18 to define circuitous flow path 14.
  • component 16 is pivoted relative to fixed component 18 to the filtering configuration illustrated in FIG 3. It is locked in this configuration by the engagement of locking bar 30 in aperture 32.
  • flow passes through the first and second sets of filtering members from left to right as shown by the arrows.
  • potential obstruction causing objects are trapped whilst "rags" and the like pass through. Any long inflexible objects which pass lengthways through the filtering members are trapped in the circuitous path 14.
  • the flow is stopped, the locking bar disengaged, and component 16 is pivoted to the cleaning configuration illustrated in FIG 4.
  • Handles 42 are provided to facilitate this operation. Trapped objects may then be manually removed as necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Filtration Of Liquid (AREA)

Abstract

La présente invention concerne un filtre (2) qui comprend un premier moyen filtrant (4, 6) pour empêcher un objet rigide et allongé de le traverser latéralement et un deuxième moyen filtrant pour l'empêcher de traverser longitudinalement. Le premier moyen filtrant comprend des éléments filtrants opposés et qui s'interpénètrent (4, 6), et le deuxième moyen filtrant comprend un parcours faisant des détours (14).
PCT/AU1996/000582 1995-09-15 1996-09-16 Filtre Ceased WO1997010389A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU69192/96A AU6919296A (en) 1995-09-15 1996-09-16 Filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN5502A AUPN550295A0 (en) 1995-09-15 1995-09-15 Filter
AUPN5502 1995-09-15

Publications (1)

Publication Number Publication Date
WO1997010389A1 true WO1997010389A1 (fr) 1997-03-20

Family

ID=3789829

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1996/000582 Ceased WO1997010389A1 (fr) 1995-09-15 1996-09-16 Filtre

Country Status (2)

Country Link
AU (1) AUPN550295A0 (fr)
WO (1) WO1997010389A1 (fr)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB857310A (fr) *
SU201259A1 (ru) * В. П. Добров, В. П. Усачев , Л. И. Городецкий Резонирующими колосниками
GB132639A (en) * 1918-10-04 1919-09-25 Babcock & Wilcox Ltd Improvements in Apparatus for Screening Coal or other Material.
US1412945A (en) * 1922-04-18 Apparatus fob treating sewage or the like
DE625875C (de) * 1935-03-03 1936-02-17 Georg Weck Sichtanlage fuer Getreidemehl
GB958739A (en) * 1961-11-28 1964-05-27 Stamicarbon Improvements in or relating to bar screens
DE1249782B (de) * 1967-09-14 Wilhelm Diefenbacher K.G., Karlsruhe Siebeinrichtung für Müll
SU1033228A1 (ru) * 1982-02-08 1983-08-07 Донецкий Ордена Трудового Красного Знамени Политехнический Институт Грохот
DE3407460A1 (de) * 1984-02-29 1985-08-29 Bezner Maschf Siebvorrichtung
DE3715020A1 (de) * 1987-05-06 1988-11-17 Geiger Maschf Helmut Doppelrechenrost zur verwendung als feinstrechen in abwasser
SU1654477A1 (ru) * 1985-12-27 1991-06-07 Московский научно-исследовательский и проектно-изыскательский институт "МосводоканалНИИпроект" Устройство дл задержани и удалени отбросов сточных вод
WO1992011408A1 (fr) * 1990-12-19 1992-07-09 Beloit Corporation Tamis pour copeaux de bois

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB857310A (fr) *
SU201259A1 (ru) * В. П. Добров, В. П. Усачев , Л. И. Городецкий Резонирующими колосниками
US1412945A (en) * 1922-04-18 Apparatus fob treating sewage or the like
DE1249782B (de) * 1967-09-14 Wilhelm Diefenbacher K.G., Karlsruhe Siebeinrichtung für Müll
GB132639A (en) * 1918-10-04 1919-09-25 Babcock & Wilcox Ltd Improvements in Apparatus for Screening Coal or other Material.
DE625875C (de) * 1935-03-03 1936-02-17 Georg Weck Sichtanlage fuer Getreidemehl
GB958739A (en) * 1961-11-28 1964-05-27 Stamicarbon Improvements in or relating to bar screens
SU1033228A1 (ru) * 1982-02-08 1983-08-07 Донецкий Ордена Трудового Красного Знамени Политехнический Институт Грохот
DE3407460A1 (de) * 1984-02-29 1985-08-29 Bezner Maschf Siebvorrichtung
SU1654477A1 (ru) * 1985-12-27 1991-06-07 Московский научно-исследовательский и проектно-изыскательский институт "МосводоканалНИИпроект" Устройство дл задержани и удалени отбросов сточных вод
DE3715020A1 (de) * 1987-05-06 1988-11-17 Geiger Maschf Helmut Doppelrechenrost zur verwendung als feinstrechen in abwasser
WO1992011408A1 (fr) * 1990-12-19 1992-07-09 Beloit Corporation Tamis pour copeaux de bois

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. 84/298976/48, Class P43; & SU,A,1 033 228 (DOM POLY), 7 August 1983. *
DERWENT ABSTRACT, Accession No. 92-078219/10, Class Q42; & SU,A,1 654 477 (MOSVODOKANALNI), 7 June 1991. *
DERWENT SOVIET INVENTIONS ILLUSTRATED, Section 6, General Inorganic etc., page 10; & SU,A,201 259 (DOBROV), 20 November 1967. *

Also Published As

Publication number Publication date
AUPN550295A0 (en) 1995-10-12

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