AU652478B2 - In-line rain water filter - Google Patents
In-line rain water filter Download PDFInfo
- Publication number
- AU652478B2 AU652478B2 AU25228/92A AU2522892A AU652478B2 AU 652478 B2 AU652478 B2 AU 652478B2 AU 25228/92 A AU25228/92 A AU 25228/92A AU 2522892 A AU2522892 A AU 2522892A AU 652478 B2 AU652478 B2 AU 652478B2
- Authority
- AU
- Australia
- Prior art keywords
- sock
- water filter
- filter element
- pipe
- collar
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 57
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000012190 activator Substances 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 2
- 238000003860 storage Methods 0.000 description 9
- 230000000717 retained effect Effects 0.000 description 7
- 241000255925 Diptera Species 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- HGOMLSWXJIICBL-UHFFFAOYSA-F dialuminum;zinc;tetrasulfate;tetracosahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[Al+3].[Zn+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O HGOMLSWXJIICBL-UHFFFAOYSA-F 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- OORLZFUTLGXMEF-UHFFFAOYSA-N sulfentrazone Chemical compound O=C1N(C(F)F)C(C)=NN1C1=CC(NS(C)(=O)=O)=C(Cl)C=C1Cl OORLZFUTLGXMEF-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
-
- 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
- B01D29/13—Supported filter elements
- B01D29/23—Supported filter elements arranged for outward flow filtration
- B01D29/27—Filter bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
- E04D13/08—Down pipes; Special clamping means therefor
- E04D2013/086—Filters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Filtration Of Liquid (AREA)
- Filtering Materials (AREA)
Description
i i 1 165 6? .~A
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name of Applicant(s): Actual Inventor(s): RODNEY GEORGE WADE RODNEY GEORGE WADE Address for Service: o a 0 a oo o o* a <l 4 i4i
CC
CULLEN CO., Patent Trade Mark Attorneys, 240 Queen Street, Brisbane, Qld. 4000, Australia.
Invention Title: IN-LINE RAIN WATER FILTER ,r o a o ooor a re o saOu a r a er a oaso o o orroo or o s The following statement is a full description of this invention, including the best method of performing it known to me: 2 THIS INVENTION relates to filters and is particularly concerned with in-line water filters. Such filters have indicative use in the filtering of rainwater collected for personal use.
Current Local Government requirements and prescribed Health Regulations dictate that pipes carrying water from a catchment region, such as a roof, to and from a storage tank, include a screen having a minimum size aperture of 0.9 mm.
Such screens effectively prevent mosquitoes from entering the storage tank and breeding.
A typical screen comprises a 0.9 mm metal mesh which is placed across the water flow, such as over the water .0,0 outlet. For a conventional stormwater piping system in which the pipes have an internal diameter of approximately 90 mm, 2 the mesh provides a water contact area of about 64cm. Such a relatively small area soon blocks up with debris with the :00 i result that water then must find somewhere to escape.
Invariably, such escape is by pushing the lid off the water .0 inspection opening, thereby leaving an access way for ~yo.mosquitoes and other vermin to enter the storage tank and contaminate the water.
0 It is therefore an object of the present invention to provide an in-line water filter which can cope with high water flow rates without blockage.
According to the present invention, there is provided a water filter element comprising a metallic gauze sock having apertures between 0.6 and 0.9 mm, said sock including a closed fish-tail taper, at one end, and being open at the other end, said open end being connected around a 3 collar which is adapted to retain the sock in a pipe at a preset location, and to space the sock from the wall of the pipe.
The filter element is preferably retained within its own housing which can readily be inserted into the water pipe.
In order to further assist the filtering process, a turbulence actuator may be located adjacent the collar at the entrance to the sock. Such a device may comprise a single or double twisted flat strip of rigid material which traverses the water flow so as to impart turbulence thereto and direct the water onto the inner surface of the metallic gauze sock.
This aids in the prevention of debris adhering to the side 0:o walls of the sock and dislodges any material which may have previously been deposited on the side walls.
Preferably the turbulence actuator is a single twisted flat metal or plastics material which has been approved for water potability. Suitable metals include So zincalum, aluminium, brass, copper, monometal, galvanized iron o and stainless steel; with the latter being preferred. Suitable plastics materials are polyvinylchloride and nylon 66.
ooo 2O ooo The turbulence actuator is ideally commensurate in ocu length with the inner diameter of the water pipe and is 00 retained in place by the top, or outwardly facing, rim of the collar.
It is an essential requirement of the invention that the filter element be fabricated from metallic gauze since this gives the rigidity necessary to prevent expansion of the filter under water flow which could seal .the filter to the inner walls of its housing and thereby prevent flow. Such a characteristic was noted in filter gauzes fabricated from 4 cloth or plastics material.
Another essential requirement is the particular fish-tail taper on the closed end of the sock. Such a taper is necessary to retain the sock in the centre of its housing, or water pipe, and to assist in the flow of water through the sides of the sock. Additionally, the taper provides a region wherein debris collects and thus does not affect the efficiency of the water passing through the side walls of the sock.
The length of the sock is preferably of substantially cylindrical configuration until it begins 0: tapering to the fish-tail portion at its closed end. It may 0 a a° be manufactured from a sheet of gauze formed from zincalum, aluminium, brass, copper, monometal, or stainless steel; with 0 6 a the latter material also being the pirferred choice. The most preferred stainless steel gauze is one having a standard weave with 0.9 mm apertures and a strand size of 0.335 mm, such as that manufactured by Boral Melwire. The sheet of gauze is formed into the sock shape by first forming a cylinder, seam o000 sstitching the cylinder with staples made from the same metal as the gauze, flattening one end of the cylinder and seam oa joining that end with the same type of staples.
Alternatively, the joints may be made by resistance welding, soldering, or the like.
The cylindrical shape for the sock is the preferred shape as this provides a uniform spacing from the water pipe/housing and thereby ensures even flow of water therethrough as well as maximum effectiveness. Other shapes could, of course, be used but generally with considerably less effectiveness.
The metallic gauze sock may be fitted to the collar by means of stitching, a circlip, or by tying with wire. The threads, circlip or wires used for this process will also be of the same metal as the gauze is fabricated from. Suitably, the collar also has a lip to prevent the sock from slipping off.
The collar is suitably dimensioned to snugly fit within the walls of the housing/pipe so that water cannot flow around it. The fit should not be too tight, however, to ensure that it, along with the sock, can be removed for 000 cleaning or replacement.
0 00 In order to retain the collar in situ, either an 0 internal ledge or projections may be formed in the pipe or 00 0 0: housing against which a flange on the collar abuts. Such a flange is preferably formed about the very end of the collar S and has the dual function of also providing a seating for the o turbulence actuator.
As mentioned previously, the filter element is 0 0 oo jooo preferably retained within its own housing. Such a housing is .00.
designed so that it can readily be inserted into a standard 0 0O 0 water pipe such as a 90 mm pvc stormwater pipe. Thus, in this latter instance, the housing is also constructed from a section of 90 mm pvc pipe optionally having a male end section to which a female annulus is connected. Such an arrangement forms an internal ledge constituted by the male end section, against which the filter cillar can abut. A housing so constructed can be removably inserted into a stormwater pipe at any location and at any orientation. The most preferred 6 orientation is, however, vertical.
The in-line water filter according to the invention has the advantage of providing a very large surface area to the passaging water as compared with conventional screens.
Thus, for a typical 90 mm pvc piping system, the length of the filter is normally chosen to be about 30 cm, providing a water 2 contact area of approximately 760 cm which is about twelve times that of a conventional screen. This increased area enables high water flow rates to be maintained without blockage, and the particular fish-tail design ensures that debris begins collecting in the fish-tail and has little S° effect on the water flow rate. Such a device thus has Sparticular usefulness in heavy rain areas as in tropical and o sub-tropical regions, and also for large catchment areas such as houses having big roof areas, farm sheds, commercial and industrial buildings.
0 By using a "leaf free gutter and downpipe rain head" *to 0 0 as disclosed in my co-pending Australian Patent Application 00 0 No. 629139, on the inlet pipe to a water storage tank, and the oo o rO filter according to the present invention, on the ov3rflow of 0000 the storage tank, a "fully closed" system is provided which 500000 .o eliminates any possibility of contamination of the water by mosquitoes or other vermin.
A preferred embodiment of the invention will now be described with reference to the accompanying drawings, in which:- Figure 1 is a longitudinal cross-section of a filter element according to the present invention; Figure 2 is a longitudinal cross-section of the 7 filter element depicted in Figure 1 retained within a housing; Figure 3 is a perspective view of a turbulence activa':or according to the invention; and Figure 4 is a schematic representation illustrating a typical rainwater collection and storage facility incorporating a filter arrangement as depicted in Figure 2.
In all the figures, like reference numerals refer to like parts.
Referring firstly to Figure i, the filter element comprises a substantially cylindrical stainless-steel gauze sock 10 of standard weave having apertures of 0.9 mm. The sock has a fish-tail taper 11 on one end and is closed by seam stitching with a 0.335 mm stainless steel thread at 12 so as 0 o0 to form a flat edge. The other end of the sock is open and encircles a retention collar 13. It is retained in position by a stainless-steel circlip 14 and is further prevented from 0 0 removal by a ledge 15 formed on the inwardly facing edge of co 0 the collar. A flange 16 is formed on the outwardly facing 0 edge of the collar for the purpose of retaining the sock in a 2 O, pipe or housing at a preset location and for the purpose of coo° spacing the sock from the wall of the pipe or housing. The #00000 o0o collar is a unitary pvc moulding which meets local Government o0 water portability requirements.
In Figure 2, the filter element is shown within its own housing 17. The housing comprises a 90 mm section of pvc piping 18 around which a female annulus 19 is connected at the water flow inlet end. The annulus is suitably retained in position by grub screws, one of which is depicted at The water flow inlet end also incorporates a 1 .i L I i -i 8 turbulence activator, shown in dotted outline at 21, which rests against the outer surface of flange 16. The turbulence activator is illustrated in detail in Figure 3 and is a "single twist" activator. It is fabricated from a flat strip of stainless steel having a thickness of 1.2 mm and extends across the middle of the housing.
The design of the filter element is such that when water carrying particles of debris flows into it in the direction depicted by the heavy arrow, the water is initially directed by the turbulence activator against the inner walls of the sock to thereby dislodge any debris which may have O.o°o become embedded in the gauze since the last flow of rainwater.
o e 0 0 Such debris, together with any debris contained in the new o flow of water, flows to the very end of the sock, into the fish-tail, where it accumulates while water passages through all sides of the sock. Debris thus accumulates from the fish- So tale region of the sock, back towards the inlet, but does not
B
o°o interfere with the substantial flow of water which is in the sidewalls of the sock.
ooe The sock is retained at an even spaced location from 400 the side walls of the housin6 not only by virtue of the o0oa0 0 collar, but also by virtue of the fish-tail end which, because of its flattened configuration, extends outwardly towards the housing beyond the cylindrical walls of the sock.
Referring to Figure 4, a closed water collection and storage facility is depicted. The facility comprises a "leaffree gutter and downpipe rainhead" 22 which collects rainwater from a roof 23. The rainhead incorporates a wire mesh having 0.9 mm apertures and therefore prevents mosquitoes and other ii 9 vermin entering the water system at this point. The rainhead is connected to a water storage tank 24 with standard 90 mm pvc stormwater piping 25. Such piping is sealed directly into the tank at 26 to ensure that there is no entry way for mosquitoes at this point. The water overflow pipe 27 is also sealed to the tank and a filter element in its own contained housing is located in this pipe adjacent to the storage tank at 28.
Such a facility provides filtered water suitable for human consumption which cannot be contaminated by mosquitoes or other vermin. It is furthermore capable of passing large volumes of rainwater without filter blockage or breakage.
oo 00o S0) o 0 0 o e0 o0 0
Claims (9)
1. A water filter element comprising a metallic gauze sock having apertures between 0.6 and 0.9 mm, said sock including a closed fish-tail taper at one end and being open at the other end, said open end being connected around a collar which is adapted to retain the sock in a pipe at a pre- set location, and to space the sock from the wall of the pipe.
2. A water filter element as claimed in claim 1 including a. pipe housing, said housing having an internal ledge against which the filter collar abuts.
3. A water filter element as claimed in claim 2, 0°o wherein the pipe housing is a section of standard 90 mm pvc stormwater pipe having a male end section to which a female Sannulus is connected, said male end section constituting the a oc l1.o ledge against which the filter collar abuts.
4. A water filter element as claimed in any one of the o00 O preceding claims and including a turbulence activator adjacent 0 00 0: the collar at the entrance to the sock, which traverses the sock opening. 23
5. A water filter element as claimed in claim 4, wherein said turbulence activator comprises a single twist 00.000 .0 o0 flat strip of rigid material which is arranged to direct passaging water onto the inner surface of the metallic gauze a sock.
6. A water filter element as claimed in any one of the preceding claims, wherein the sock is of substantially cylindrical configuration and is manufactured from stainless steel gauze having a standard weave with 0.9 mm apertures.
7. A water filter element as claimed in any one of the 11 preceding claims, wherein the sock is fitted to the collar by means of a circlip or by tying with wire.
8. A water filter element as claimed in any one of the preceding claims, wherein the collar is dimensioned to snugly fit within the walls of the housing/pipe but yet be readily removable therefrom.
9. A water filter element as claimed in claim 8, wherein the collar includes a lip to assist in the prevention of the sock slipping off, and a flange on one end which spaces the sock from the wall of the housing/pipe. A water filter substantially as herein described with reference to the accompanying drawings. a" DATED THIS 21st day of September 1992 RODNEY GEORGE WADE By his Patent Attorneys CULLEN CO. a a .o e 6 o y i- I
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU25228/92A AU652478B2 (en) | 1992-09-21 | 1992-09-21 | In-line rain water filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU25228/92A AU652478B2 (en) | 1992-09-21 | 1992-09-21 | In-line rain water filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2522892A AU2522892A (en) | 1994-04-14 |
| AU652478B2 true AU652478B2 (en) | 1994-08-25 |
Family
ID=3714093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU25228/92A Ceased AU652478B2 (en) | 1992-09-21 | 1992-09-21 | In-line rain water filter |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU652478B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2420295A (en) * | 2004-11-19 | 2006-05-24 | Robert Vaughan | Rainwater pipe filter |
| FR2887158A1 (en) * | 2005-06-15 | 2006-12-22 | Ec Eau Systeme Sarl | Filter unit, especially for rainwater recuperation system, has flexible spiral filtering sleeve inside second supple sleeve with increased filtering capacity |
| GB2451056A (en) * | 2006-12-22 | 2009-01-21 | Bishop & Bagust Ltd | Filter |
| CN110469682A (en) * | 2019-08-17 | 2019-11-19 | 刘艳文 | A kind of blowdown valve |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU745752B2 (en) * | 1997-09-03 | 2002-03-28 | Brian Warren Leahy | Pollutant interceptor |
| AU726168B2 (en) * | 1998-05-07 | 2000-11-02 | Gregory Leslie Lewis | Solids separator |
| AUPP336098A0 (en) * | 1998-05-07 | 1998-05-28 | Lewis, Gregory Leslie | In vessel solids separator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3744378A (en) * | 1977-06-27 | 1980-01-03 | United States Filter Corp | Bag filter assembly |
| AU5874890A (en) * | 1989-07-21 | 1991-01-24 | Societe Des Produits Nestle S.A. | A filtration device |
-
1992
- 1992-09-21 AU AU25228/92A patent/AU652478B2/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3744378A (en) * | 1977-06-27 | 1980-01-03 | United States Filter Corp | Bag filter assembly |
| AU5874890A (en) * | 1989-07-21 | 1991-01-24 | Societe Des Produits Nestle S.A. | A filtration device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2420295A (en) * | 2004-11-19 | 2006-05-24 | Robert Vaughan | Rainwater pipe filter |
| FR2887158A1 (en) * | 2005-06-15 | 2006-12-22 | Ec Eau Systeme Sarl | Filter unit, especially for rainwater recuperation system, has flexible spiral filtering sleeve inside second supple sleeve with increased filtering capacity |
| GB2451056A (en) * | 2006-12-22 | 2009-01-21 | Bishop & Bagust Ltd | Filter |
| GB2451056B (en) * | 2006-12-22 | 2011-08-17 | Bishop & Bagust Ltd | Filter |
| CN110469682A (en) * | 2019-08-17 | 2019-11-19 | 刘艳文 | A kind of blowdown valve |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2522892A (en) | 1994-04-14 |
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