WO1982001666A1 - Self cleaning filter - Google Patents

Self cleaning filter Download PDF

Info

Publication number
WO1982001666A1
WO1982001666A1 PCT/AU1981/000162 AU8100162W WO8201666A1 WO 1982001666 A1 WO1982001666 A1 WO 1982001666A1 AU 8100162 W AU8100162 W AU 8100162W WO 8201666 A1 WO8201666 A1 WO 8201666A1
Authority
WO
WIPO (PCT)
Prior art keywords
turbine
filter
interior
self cleaning
filter unit
Prior art date
Application number
PCT/AU1981/000162
Other languages
French (fr)
Inventor
Irrigation Systems Pty Ltd Ris
Original Assignee
Tucker Alfred D
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 Tucker Alfred D filed Critical Tucker Alfred D
Priority to AU77276/81A priority Critical patent/AU7727681A/en
Publication of WO1982001666A1 publication Critical patent/WO1982001666A1/en

Links

Classifications

    • 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
    • B01D29/11—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 bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/117—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 bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
    • 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
    • B01D29/50—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 multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—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 multiple filtering elements, characterised by their mutual disposition in series connection
    • B01D29/58—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 multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
    • 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
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
    • B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to the filtering element
    • 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
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B01D29/682—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/58—Power supply means for regenerating the filter
    • B01D2201/583—Power supply means for regenerating the filter using the kinetic energy of the fluid circulating in the filtering device

Definitions

  • This invention relates to a self cleaning filter such as may be used in an irrigation system,
  • U.S. Patent No. 4060483 discloses a method and apparatus for effecting the cleaning of a fluid filter by a hollow filter cleaning body having an inlet situated in close proximity to the filter member, the flow of water through the cleaning body causing movement of the cleaning body, the cleaning water then flowing through an exhaust port.
  • a self cleaning filter unit having a liquid inlet and a liquid outlet, a filtering member disposed between said filter inlet and filter outlet, an exhaust outlet, means disposed within said filter unit for moving a filter cleaning element over said filter element to remove filtered material therefrom, and means driving said filter cleaning element responsive to flow of fluid from said filter cleaning element through said exhaust to sweep away said filtered material through said exhaust.
  • FIG. 1 is a longitudinal cross-sectional view of the invention
  • FIG. 2 is a cross-section on the lines 2-2 of FIG. 1 on an enlarged scale.
  • the filter unit can comprise a generally cylindrical casing 1 having an inlet 2 and socket 3 toward one end and an outlet 4 and socket 5 toward the other end.
  • a cylindrical filter element 6 Within the casing there is disposed a cylindrical filter element 6, the element being mounted in rings 7 which are sealed by sealing members 8 to the interior of the cylindrical casing 1.
  • the cylindrical filter element 6 is positioned such that the fluid will flow in through the inlet 2 into the interior of the casing at that end and then through the interior of the filter 6, and after passing through the filter element 6 is discharged through the outlet port 4.
  • the inlet flows from the inlet 2 through a course prefilter portion 6a into the interior of the filter 6.
  • the cylindrical casing 1 at the inlet end is closed by an end cap 9 provided with suitable sealing rings 10, the cap being maintained in position by a longitudinal rod 11 passing through the filter unit to be secured to the end cap 12 at the outlet end of the filter unit.
  • This second end cap is provided with an exhaust outlet 13 and sealing rings 10, with the rod 11 supporting on a bush 14 and thrust bearing 15 a water turbine 16 between the end cap 12 and the adjacent ring 7.
  • the water turbine 16 has two arms 17 extending radially, each arm having an aperture 28 so that the water is discharged tangentially to cause the turbine to rotate.
  • This water turbine 16 is connected to a hollow member 17 surrounding said rod and extending through the filter element and supported on the rod 11 by a bush 18 at the ring 7 adjacent the inlet 2 to the casing 1.
  • the hollow member 17 is shaped to have a portion 19 adjacent to the inner surface of the filter 6 , where the member 17 is provided with a series of slits, holes or apertures 20.
  • the hollow member 17 is also provided with a longitudinal brush element 21 supported from the hollow element by suitable arms 22 or the like. The brush element is adapted to contact the interior of the filter element for cleaning the filtered material therefrom.
  • a drive housing 23 surrounds the turbine 16, and has a radial wall 24 and a sealing ring 25 to seal the turbine drive area from the filter area except through the hollow member 17.
  • the exhaust 13 can be provided with a suitable flow control, and in normal operation of the filter device this exhaust valve is closed so that the water will flow from the inlet 2 through the interior of the filter element 6 and to the outlet port 4. At this time also the hollow element 17 and the turbine 16 will be filled with water.
  • the thrust bearing 15 carries a disc 26 to help break up the turbulance from the turbine and allow the water to flow through the exhaust.
  • the hollow element may have a plurality of apertures therein to allow the water to flow therethrough, or could have a longitudinal slit or plurality of slits, which slits can be positioned in relation to the filter and the brush to that as the element and brush rotate the disturbed filtered material and debris would immediately be swept through the slit.
  • the slit is preferably positioned in the vicinity of the filtering element so that as the water flows through the slit it will carry with it the debris and filtered material loosely adhered to the filtering element.
  • the control of the filter unit by the valve positioned in the exhaust aperture or in the exhaust line can be manually operated or alternatively be controlled automatically either by sensing the back pressure in the filter, or alternatively be controlled by a timer or some other control such as the quantity of water which has passed through the filter.
  • the filter element with its sealing rings and the hollow member and the turbine can be readily assembled into the outer cylindrical casing through the ends of the cylindrical casing and are retained in position by the longitudinal rod and the end caps.

Abstract

A self cleaning filter unit for irrigation systems, the unit comprising a housing having a water inlet (2), a water outlet (4) and a cleaning exhaust passage (13). The filter unit has a cylindrical filter (6) with the water inlet directing water to the interior of the filter element. A rotatable hollow member (17) carrying a brush (21) has an inlet opening (19) adjacent said filter is connected to a turbine (16) to pass water to said exhaust passage, so that with the exhaust passage open the flow of water through the inlet opening (19) of the hollow member (17) sweeps debris through the turbine (16) to the exhaust passage (13), the turbine (16) rotating the hollow member (17).

Description

"SELF CLEANING FILTER"
This invention relates to a self cleaning filter such as may be used in an irrigation system,
Background of the Invention
With the advent of irrigation systems where the irrigation water is sprayed through small nozzles, or where the irrigation is carried out by drip irrigation, it is essential that the water be filtered before passing to the spray nozzles or drip units otherwise these would readily clog 'with the particles carried in suspension in the water. Thus it is necessary that filter units be supplied and that some way be provided for effectively cleaning these filter units. While it is known that filter units can be dismantled and manually cleaned or replaced, this procedure is not entirely satisfactory.
Also filtering units are known where a reverse flow can flush the collected filtered material from the filter, this being flushed through an exhaust port. However these rely solely on the flow of water and thus an effective cleaning is not always carried out. An example of this has applied to a cartridge of particulate filter medium is shown in Australian Patent No. 420747.
U.S. Patent No. 4060483 discloses a method and apparatus for effecting the cleaning of a fluid filter by a hollow filter cleaning body having an inlet situated in close proximity to the filter member, the flow of water through the cleaning body causing movement of the cleaning body, the cleaning water then flowing through an exhaust port.
Brief Description of the Invention Thus there is provided according to the invention a self cleaning filter unit, the unit having a liquid inlet and a liquid outlet, a filtering member disposed between said filter inlet and filter outlet, an exhaust outlet, means disposed within said filter unit for moving a filter cleaning element over said filter element to remove filtered material therefrom, and means driving said filter cleaning element responsive to flow of fluid from said filter cleaning element through said exhaust to sweep away said filtered material through said exhaust.
Brief Description of the Drawings
In order to more fully describe the invention, reference will now be made to the accompanying drawings in which:
FIG. 1 is a longitudinal cross-sectional view of the invention, and
FIG. 2 is a cross-section on the lines 2-2 of FIG. 1 on an enlarged scale.
Description of the Preferred Embodiment
In a preferred form of the invention the filter unit can comprise a generally cylindrical casing 1 having an inlet 2 and socket 3 toward one end and an outlet 4 and socket 5 toward the other end. Within the casing there is disposed a cylindrical filter element 6, the element being mounted in rings 7 which are sealed by sealing members 8 to the interior of the cylindrical casing 1. The cylindrical filter element 6 is positioned such that the fluid will flow in through the inlet 2 into the interior of the casing at that end and then through the interior of the filter 6, and after passing through the filter element 6 is discharged through the outlet port 4. The inlet flows from the inlet 2 through a course prefilter portion 6a into the interior of the filter 6.
The cylindrical casing 1 at the inlet end is closed by an end cap 9 provided with suitable sealing rings 10, the cap being maintained in position by a longitudinal rod 11 passing through the filter unit to be secured to the end cap 12 at the outlet end of the filter unit. This second end cap is provided with an exhaust outlet 13 and sealing rings 10, with the rod 11 supporting on a bush 14 and thrust bearing 15 a water turbine 16 between the end cap 12 and the adjacent ring 7. The water turbine 16 has two arms 17 extending radially, each arm having an aperture 28 so that the water is discharged tangentially to cause the turbine to rotate. This water turbine 16 is connected to a hollow member 17 surrounding said rod and extending through the filter element and supported on the rod 11 by a bush 18 at the ring 7 adjacent the inlet 2 to the casing 1. The hollow member 17 is shaped to have a portion 19 adjacent to the inner surface of the filter 6 , where the member 17 is provided with a series of slits, holes or apertures 20. The hollow member 17 is also provided with a longitudinal brush element 21 supported from the hollow element by suitable arms 22 or the like. The brush element is adapted to contact the interior of the filter element for cleaning the filtered material therefrom. A drive housing 23 surrounds the turbine 16, and has a radial wall 24 and a sealing ring 25 to seal the turbine drive area from the filter area except through the hollow member 17.
The exhaust 13 can be provided with a suitable flow control, and in normal operation of the filter device this exhaust valve is closed so that the water will flow from the inlet 2 through the interior of the filter element 6 and to the outlet port 4. At this time also the hollow element 17 and the turbine 16 will be filled with water. The thrust bearing 15 carries a disc 26 to help break up the turbulance from the turbine and allow the water to flow through the exhaust.
However on opening the exhaust port fluid will flow from the interior of the filter element through the hollow member and through the water turbine to drive the turbine to rotate the hollow element with the brush attached thereto so that the brush then sweeps over the interior of the filter element. The flow of water as it sweeps past the filter and into the hollow through the slots will carry with it the debris and filtered material which has been removed from the filter element by the brush and this material is then discharged to waste through the exhaust port.
The hollow element may have a plurality of apertures therein to allow the water to flow therethrough, or could have a longitudinal slit or plurality of slits, which slits can be positioned in relation to the filter and the brush to that as the element and brush rotate the disturbed filtered material and debris would immediately be swept through the slit. The slit is preferably positioned in the vicinity of the filtering element so that as the water flows through the slit it will carry with it the debris and filtered material loosely adhered to the filtering element.
The control of the filter unit by the valve positioned in the exhaust aperture or in the exhaust line can be manually operated or alternatively be controlled automatically either by sensing the back pressure in the filter, or alternatively be controlled by a timer or some other control such as the quantity of water which has passed through the filter.
One suitable form of valve is that shown in Australian Patent No. 508284 entitled "Automatic Filter Backwash Control".
The filter element with its sealing rings and the hollow member and the turbine can be readily assembled into the outer cylindrical casing through the ends of the cylindrical casing and are retained in position by the longitudinal rod and the end caps.
It will be realised that various forms of water turbines can be provided, that is being either the reaction or impulse type and either operated by way of the use of curved vanes or jets or the like.
It will be seen that by the action of the brush passing over the filter element that this readily disturbes the collected material therefrom, this not only being suspended particles being carried by the water, but also any accumulated algae or slime or the like which tends to collect on these components. The brush then disturbs these filtered materials and these are then easily carried away by the flow through the exhaust port.
This can be carried out during the normal operation of the filter or alternatively the flow through the outlet port can be stopped during the filter cleaning operation but in normal practice the cleaning would take place during the normal operation of the filter.
O PI A 1PO -**y , Although one form of the invention has been described in some detail it is to be realised that the invention is not to be limited thereto but can include various modifications falling within the spirit and scope of the invention.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:-
1. A self cleaning filter unit, said unit comprising a cylindrical housing, an inlet at one end of said housing and an outlet at said other end, a circular filter element supported by sealing rings engaging the interior of said housing, characterised by a tubular element supported on a rod extending through said housing and connected to a turbine, an exhaust outlet in an end cap adjacent said turbine, said tubular element having a portion adjacent to the interior of said filter element, openings in said portion opening into the interior of said tubular element whereby fluid can flow through said inlet into the interior of said filter element through said filter to said outlet, and when said exhaust is open, fluid flows from the interior of said filter element through said openings into the tubular element to said turbine which rotates said tubular element sweeping the filtered material from said filter through said exhaust.
2. A self cleaning filter unit as defined in Claim 1 further characterised by a brush carried by said tubular element and adapted to sweep the interior of said filter element ahead in the direction of rotation of said portion of said tubular element.
3. A self cleaning filter unit as defined in Claim 1 further characterised in that said turbine is mounted in a drive housing having a radial wall adjacent the adjacent sealing ring, a further seal sealing said radial wall to said tubular member, said tubular member having a hollow portion passing through said further sealing ring and connected to said turbine.
4. A self cleaning filter unit as defined in Claim 3 further characterised in that said turbine has a pair of hollow radial arms, a tangential aperture in each arm through which water will pass to- cause the turbine to rotate.
5. A self cleaning filter unit as defined in Claim 1 further characterised in that said turbine is spaced from the adjacent end cap by a thrust bush carrying a circular baffle.
6. A self cleaning filter unit substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
PCT/AU1981/000162 1980-11-13 1981-11-12 Self cleaning filter WO1982001666A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU77276/81A AU7727681A (en) 1980-11-13 1981-11-12 Self cleaning filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU647480 1980-11-13
AU6474/80801113 1980-11-13

Publications (1)

Publication Number Publication Date
WO1982001666A1 true WO1982001666A1 (en) 1982-05-27

Family

ID=3697013

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1981/000162 WO1982001666A1 (en) 1980-11-13 1981-11-12 Self cleaning filter

Country Status (5)

Country Link
ES (1) ES269279Y (en)
FR (1) FR2493721A1 (en)
GB (1) GB2099326A (en)
IT (1) IT8168472A0 (en)
WO (1) WO1982001666A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677265A1 (en) * 1991-06-06 1992-12-11 Beaudrey & Cie Filter with stationary strainer
FR2677264A1 (en) * 1991-06-06 1992-12-11 Beaudrey & Cie ROTARY WASHING RAMP FILTER.
WO1998014260A1 (en) * 1996-10-01 1998-04-09 Davidson, Clifford, M. Filter
EP0993853A2 (en) * 1998-10-16 2000-04-19 Filtra di Pruni S. & C. S.n.c. A device for filtering liquid substances
US6155430A (en) * 1996-09-02 2000-12-05 Hoshen Water Technologies Ltd. Filter
GB2388797A (en) * 2002-03-25 2003-11-26 Son Screen Pty Ltd An overflow screening device including an internal brush arrangement
US9022223B1 (en) 2012-08-02 2015-05-05 Instapure Brands, Inc. Self-cleaning water filtration system
EP4104681A1 (en) * 2015-10-27 2022-12-21 Feltrim Pastoral Company Pty Ltd Self-cleaning filter for fluids

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112426767B (en) * 2020-10-30 2021-09-28 南京嘉源润新环保科技有限公司 Treatment device for printing and dyeing wastewater and control method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975899A (en) * 1957-04-16 1961-03-21 Bird Machine Co Screening device
US3056501A (en) * 1959-08-03 1962-10-02 Gen Motors Corp Transmission oil filter assemblage
US3363759A (en) * 1964-04-29 1968-01-16 Bird Machine Co Screening apparatus with rotary pulsing member
FR2183719A1 (en) * 1972-05-05 1973-12-21 Kluber Apparatebau Wasseraufbe Self-cleaning filter - by backwashing process
AU497176B2 (en) * 1975-05-14 1978-12-07 Filtration Ltd. Filter
AU4187878A (en) * 1977-11-26 1979-05-31 Holstein & Kappert Gmbh Cleaning filter
AU5313079A (en) * 1978-11-26 1980-05-29 Gideon Gilead Self cleaning filter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR330682A (en) * 1903-03-28 1903-08-24 James Mallory Vaughan Filter refinements
US2652153A (en) * 1950-09-02 1953-09-15 Jackson L Culbertson Pipe line strainer
AT220161B (en) * 1959-12-24 1962-03-12 Oscar Pauser Filter apparatus for cleaning swimming pool water
DE2140349A1 (en) * 1971-08-11 1973-03-01 Tadashi Hagihara Filter - for removal of foreign matter from river or seawater - before industrial use
GB2035115A (en) * 1978-11-17 1980-06-18 Drori M Backwashable fluid filter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975899A (en) * 1957-04-16 1961-03-21 Bird Machine Co Screening device
US3056501A (en) * 1959-08-03 1962-10-02 Gen Motors Corp Transmission oil filter assemblage
US3363759A (en) * 1964-04-29 1968-01-16 Bird Machine Co Screening apparatus with rotary pulsing member
FR2183719A1 (en) * 1972-05-05 1973-12-21 Kluber Apparatebau Wasseraufbe Self-cleaning filter - by backwashing process
AU497176B2 (en) * 1975-05-14 1978-12-07 Filtration Ltd. Filter
AU4187878A (en) * 1977-11-26 1979-05-31 Holstein & Kappert Gmbh Cleaning filter
AU5313079A (en) * 1978-11-26 1980-05-29 Gideon Gilead Self cleaning filter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Plant Engineering, Volume 32, Part 12, issued 1978 June 8, (BARRINGTON, III) J.I. Schaeffer: "Self Cleaning Filtration Systems", pages 115-118 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677265A1 (en) * 1991-06-06 1992-12-11 Beaudrey & Cie Filter with stationary strainer
FR2677264A1 (en) * 1991-06-06 1992-12-11 Beaudrey & Cie ROTARY WASHING RAMP FILTER.
US6155430A (en) * 1996-09-02 2000-12-05 Hoshen Water Technologies Ltd. Filter
WO1998014260A1 (en) * 1996-10-01 1998-04-09 Davidson, Clifford, M. Filter
EP0993853A2 (en) * 1998-10-16 2000-04-19 Filtra di Pruni S. & C. S.n.c. A device for filtering liquid substances
EP0993853A3 (en) * 1998-10-16 2000-06-21 Filtra di Pruni S. & C. S.n.c. A device for filtering liquid substances
GB2388797A (en) * 2002-03-25 2003-11-26 Son Screen Pty Ltd An overflow screening device including an internal brush arrangement
GB2388797B (en) * 2002-03-25 2005-07-20 Son Screen Pty Ltd Overflow screening device
US7077957B2 (en) * 2002-03-25 2006-07-18 Son Screen Pty Ltd Overflow screening device
US9022223B1 (en) 2012-08-02 2015-05-05 Instapure Brands, Inc. Self-cleaning water filtration system
EP4104681A1 (en) * 2015-10-27 2022-12-21 Feltrim Pastoral Company Pty Ltd Self-cleaning filter for fluids

Also Published As

Publication number Publication date
ES269279Y (en) 1984-01-01
ES269279U (en) 1983-06-16
GB2099326A (en) 1982-12-08
FR2493721A1 (en) 1982-05-14
IT8168472A0 (en) 1981-11-12

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