GB2137110A - Filter Element Mounting - Google Patents
Filter Element Mounting Download PDFInfo
- Publication number
- GB2137110A GB2137110A GB08407752A GB8407752A GB2137110A GB 2137110 A GB2137110 A GB 2137110A GB 08407752 A GB08407752 A GB 08407752A GB 8407752 A GB8407752 A GB 8407752A GB 2137110 A GB2137110 A GB 2137110A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- cage
- retaining means
- filter element
- elements
- 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.)
- Withdrawn
Links
- 238000011001 backwashing Methods 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- B01D29/62—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
- B01D29/688—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with backwash arms or shoes acting on the cake side
-
- 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
- B01D29/52—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 parallel connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/29—Filter cartridge constructions
- B01D2201/291—End caps
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
A filter has a plurality of cylindrical filter elements (5) removably mounted over holes (4) in a hollow filter cage (3). The cage encloses a rotary backwash pipe with nozzles aligning with circumferential rows of holes (4). The filter cage (3) has filter element-retaining means in the form of a T-slot (7) or spaced bars or pins. The filter elements (5) each have a circumferential flange provided with at least one flat (9) so that, in a first angular orientation of a filter element (5) the filter element is held firmly by engagement of the flange under the retaining means (7) and, in a second angular orientation, it is free for removal. Alternatively the element may simply slide laterally clear of retaining means (7) without rotation. <IMAGE>
Description
SPECIFICATION
Improved Filter
This invention relates to an improved filter.
In our prior Patent No. 2067087 there is disclosed a filter having a plurality of cylindrical filter elements supported over respective holes in a stationary hollow supporting filter cage. The holes are arranged in axial rows and each row of filter elements is held in position by a releasable clamping bar or bars. In order to clean the filter elements a rotatable backwash pipe is disposed axially and nozzles in the pipe are arranged to register with each hole in succession to backwash the filter elements.
Whilst this arrangement overcame the problem of retaining filter elements without screwing or bolting the elements in position, we have now designed an improved filter which provides an improved method of fitting the filter elements in position.
According to the present invention there is provided a filter comprising a plurality of filter elements covering respective holes in a filter cage, and retaining means for holding the elements in position against lateral displacement, the filter elements, in a first position being retained by the retaining means against their respective holes in the filter cage and, in a second position being releasable by simple manipulation.
Preferably the retaining means comprises one or more T-shaped slots in the filter cage, each filter element having a flange with two opposed flats which permit the filter element to be fitted and locked, or alternatively released, simply by turning the filter element angularly through 900.
Alternatively, the retaining means may be enlarged headed pins on the filter cage.
More particularly a filter comprises a plurality of filter elements supported exteriorly over holes in a hollow filter cage, a backwash pipe disposed axially of the filter cage, ducts in the backwash pipe arranged to register with the holes in the filter cage, means for effecting relative rotation between the backwash pipe and the filter cage so that the ducts are brought into registration in turn with the holes to permit backwashing of the filter elements, and slot means for positioning the filter elements over their respective holes, the filter elements each having a flange which, in a first angular orientation of the element retains the filter element firmly within the slot means and, in a second angular orientation thereof, permits removal of the filter element by simple manipulation.If desired the filter elements may be locked against angular movement by releasable locking means.
The invention will now be described by way of example with reference to the accompanying drawings in which:
Figure 1 is a side elevation of a filter in accordance with the invention, partly broken away;
Figures 2a and 2b are enlarged side and front elevations showing a filter element in one arrangement of locked position;
Figures 3a and 3b are enlarged side and front elevations showing the arrangement of Figures 2a and 2b in the unlocked position;
Figures 4a and 4b are enlarged side and front elevations showing an alternative locking arrangement;
Figure 5a is a diagrammatic view of an alternative retaining means;
Figure 5b is a section on A-A in Figure 5a;
Figure 6a is diagrammtic view of a further alternative retaining means;
Figure 6b is a section on B-B in Figure 6a;;
Figure 7a is a diagrammatic view of another alternative retaining means;
Figure 7b is a section on C-C in Figure 7a;
Figure 8a is a diagrammatic view of yet another alternative retaining means;
Figure 8b is a section on D-D in Figure 8a;
Figure 9 is a diagrammatic view of a further alternative embodiment; and
Figures 9a and 9b are diagrammatic perspective view of a filter element showing fitting where the retaining means is a continuous machined slot.
In Figure 1 a filter body 1 has an inlet pipe 2 through which liquid to be filtered normally flows.
The inlet pipe communicates with the interior of a filter cage 3 which has a plurality of holes 4 formed therein and arranged in vertical rows. The holes 4 define flow spaces for the liquid to be filtered and disposed over each hole 4 is a filter element 5 of cylindrical or other shape. The filter media is suitably a wire mesh filter media, but may be any other suitable media such as a perforated sheet, gauze, or sintered material or may be a unit including loose filtering media such as sand or activated carbon.
The filter elements 5 are located on the holes 4, suitably, where fine filtration is involved with an '0' ring seal 6 sealing about the mouth of the respective opening (see Figure 2a).
In order to hold the filter elements 5 in position, in one arrangement, retaining means in the form of slots 7 are machined into the filter cage 3 and each filter element 5 is formed with an annular flange 8 which engages in a respective slot 7. The filter element flange 8 has two opposed flats 9 which permit the filter element 5 to be fitted and locked, or alternatively released, by simply turning the filter element 5 angularly through 900 so that, when the flats 9 are aligned with the slot 7, the filter element 5 may be lifted out or inserted (see Figures 9a, 9b).
A liquid to be filtered flows into the filter by way of the pipe 2, as indicated by the arrow, passes through the filter element 5, and is discharged through an outlet pipe 10. Disposed axially of the filter cage is a backwash pipe 11 having eight backwash ducts 12 which align to turn with each of the holes 4 when the backwash pipe 11 is caused to rotate by means of a drive unit 13.
It will be understood that the arrangement shown in Figure 1 is an example only and the unit may be arranged differently. Thus the drive unit 13 may be underneath rather than on top and the inlet and outlet pipes 2 and 10 positioned on opposite sides, or the cover may be raised and rotated as disclosed in our prior patent 2067087 to which reference is directed for a fuller disclosure of this aspect.
The retaining means for retaining the filter elements 5 can be a machined slot 7 as disclosed above or may take an alternative form as shown in one of Figures 5a to 9, Figures 5a, 6a, 7a, 8a and 9 of which show the filter elements 5 in both a locked and an unlocked position.
Thus, in the arrangement of Figures 5a, and 5b the filter elements 5 are releasably locked under opposed pairs of abutments in the form of pins 20 secured to the filter cage 3 and each having an enlarged head 21 under which the flanges 8 of the filter elements 5 may engage.
In Figures 6a and 6b, the filter elements 5 are releasably locked in a machined slot 30 with locking lips or abutments 31 only at the filter element positions. The arrangement of Figures 7a and 7b illustrates a method of releasably securing the filter elements 5 under strips 40 bolted to the filter cage 3 and spaced therefrom by narrow strips 41 so as to provide locking lips 42. The arrangement of Figures 8a and 8b the arrangement is similar to that shown in Figures 7a and 7b except that the spacing of the strips 40 from the filter cage 3 is achieved by means of spacing washers 43.
In Figure 9 the retaining means is a machined slot 50 but the filter elements 5 are provided with only one flat 5, the opposed flange portion 52 being located or freed by inclination of the filter element 5 out of radial orientation with respect to the filter cage.
When it is necessary to clean or replace a filter element 5 the top cover 14 or a lid (not shown) is released and lifted. In order to protect the filter element 5 against damage during lifting fixed guide bars 15 are provided which extend axially of the filter cage 3 and are positioned between the vertical rows of holes 4. When the covers 14 or lid, has been removed the filter elements 5 to be removed are simply manipulated through 900 to align the flats 9 or flat 51 with the retaining means and then pulled away.
Alternatively, where the retaining means are spaced abutments, it may be possible to slide the filter elements vertically to allow release between abutments without angular movement.
In some cases a plate 16, such as that shown at the lower edge of the filter cage 3 in Figures 4a, 4b, may be provided to lock in a stack of filter elements 5. Alternatively, as shown in Figures 2a, 2b, 3a, 3b a ring 17 with milled recesses 18 may be provided which, upon rotation of the ring 1 7, brings a recess 18 opposite to a stack of filter elements 5 giving enough freedom for each one to be rotated and released.
In use the self-cleaning backwashing filter is arranged to allow flow to continue whilst the cleaning operation is in progress. Contaminated
liquid is introduced to within the filter cage 3
through the inlet 2 and passes to the outlet 10
through the filter elements 5. Cleaning is
accomplished by rotation of the backwash pipe
11 and its radial ducts 12 which align briefly with
each filter element 5 in turn. The action of the
ducts traversing the filter elements induces a
reversal of flow of clean liquid back through the
filter elements 5 causing any dirt to be washed off
and conveyed to a backwash discharge 19. The
backwashing may be continuous or intermittent
and may be controlled electronically by the
pressure differential across the filter cage 3.
When it is desired to remove one or more tilter
elements 5 for replacement, the locking plate 16
or ring 1 7, if provided, is released or moved to a
releasing position, and then the filter elements are
simply removed from registration with holes 4 by
angular manipulation through 900. In practice, in
order to release a filter element 5 it is only
necessary for it to lift axially about 5 mm to allow
the flats 9 or flat 51 to be vertically aligned so
that the filter element can be taken out for
cleaning or renewal. In this way the filter
elements 5 need not be slid the length of the filter
cage 3 over the holes 4 which could damage the
O-ring seals 6. Moreover, as there is no screw
interengagement between the filter elements 5
and the filter cage 3 removal is made easier.
Although the filter elements are preferably
cylindrical in shape they may be of any other
suitable shape.
As can be seen from Figure 1 the stacks of
filter elements 5 may be retained by the top cover
of the filter or by a plate attached to it as an
alternative to the proposals in Figures 2a, 2b, 3a, - 3b. In some cases the element cage 3 may be
attached to the filter top flange and lifted with it
so the filter elements are released and can be
moved downwardly to permit release. These
alternative methods all provide the necessary
clearance to enable the filter elements 5 to be
rotated and released as described above.
Claims (10)
1. A filter comprising a plurality of filter
elements covering respective holes in a filter
cage, and retaining means for holding the filter
elements in position against lateral displacement,
the filter elements, in a first position, being
retained by the retaining means against their
respective holes in the filter cage and, in a second
position, being releasable from the filter cage by
simple manipulation.
2. A filter according to claim 1 wherein the
change from the first position to the second
position involves angular movement of a filter
element relative to the filter cage.
3. A filter according to claim 1 wherein the
change from the first position to the second
position involves movement of a filter element
across the surface of the filter cage.
4. A filter according to claim 1 or 2 wherein the
retaining means is one or more elongate T-slots in
the filter cage.
5. A filter according to claim 1 wherein the retaining means comprises opposed abutments one positioned on each of two opposed sides of each hole in the:filter Cage.
6. A filter according to claim 5 wherein the abutments are enlarged headed pins.
7. A filter according to any one of the preceding claims wherein the filter elements each have a flange which is engageable under the retaining means.
8. A filter assembly according to claim 7 wherein the flange includes at least one flat whereby in a first angular position of a filter element it is held firmly against its respective hole in the filter cage with the flange under the retaining means, and in a second angular position the or each flat is free from the retaining means to permit removal of the filter element.
9. A filter comprising a plurality of filter elements supported exteriorly over holes in a hollow filter cage, a backwash pipe disposed axially of the filter cage, ducts in the backwash pipe arranged to register with the holes in the filter cage, means for effecting relative rotation between the backwash pipe and the filter cage so that the ducts are brought into registration in turn ~with the holes to permit backwashing of the filter elements, and slot means for positioning the filter elements over their respective holes, the filter elements each having a flange which, in a first angular orientation of the element retains the filter element firmly within the slot means and, in a second angular orientation thereof, permits removal of the filter element by simple
manipulation. If desired the filter elements may be locked against angular movement by releasable
locking means.
10. A filter element for a filter according to any one of the preceding claims comprising a hollow body including filter media, an outlet from the
hollow body adapted to be positioned over an opening in a filter cage of a filter, and a flange on an outer portion of the body of the filter element,
the filter element having at least one flat whereby,
in use, the filter element can be locked or released from interengagement with retaining means on a filter cage by manipulation to change the angular
orientation of the filter element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08407752A GB2137110A (en) | 1983-03-29 | 1984-03-26 | Filter Element Mounting |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB838308588A GB8308588D0 (en) | 1983-03-29 | 1983-03-29 | Filter |
| GB08407752A GB2137110A (en) | 1983-03-29 | 1984-03-26 | Filter Element Mounting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8407752D0 GB8407752D0 (en) | 1984-05-02 |
| GB2137110A true GB2137110A (en) | 1984-10-03 |
Family
ID=26285655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08407752A Withdrawn GB2137110A (en) | 1983-03-29 | 1984-03-26 | Filter Element Mounting |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2137110A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2239195A (en) * | 1989-12-23 | 1991-06-26 | Btr Plc | Mounting of filter units |
| EP0870921A2 (en) * | 1997-04-08 | 1998-10-14 | Lucas Industries Public Limited Company | Filter arrangement |
| EP1366789A1 (en) * | 2002-05-10 | 2003-12-03 | Hydraulik-Ring Gmbh | Filter cartridge (for liquids) which can be destroyed by freezing especially for fuel cell vehicles and combustion engines preferably diesel engines |
| US7815805B2 (en) | 1996-07-12 | 2010-10-19 | Entegris, Inc. | Connector apparatus and system including connector apparatus |
| US7954647B2 (en) | 2000-05-12 | 2011-06-07 | Pall Corporation | Filters |
| US8074673B2 (en) | 2004-05-18 | 2011-12-13 | Hydraulik-Ring Gmbh | Freeze-resistant metering valve |
| US8201393B2 (en) | 2008-03-05 | 2012-06-19 | Hilite Germany Gmbh | Exhaust-gas aftertreatment device |
| US8266892B2 (en) | 2007-01-25 | 2012-09-18 | Friedrich Zapf | Calibrated dosing unit, especially of an exhaust gas treatment unit |
| US8875502B2 (en) | 2010-12-14 | 2014-11-04 | Cummins Ltd. | SCR exhaust gas aftertreatment device |
| US8938949B2 (en) | 2009-08-03 | 2015-01-27 | Cummins Ltd. | SCR exhaust gas aftertreatment device |
| EP3970828A1 (en) * | 2020-09-18 | 2022-03-23 | Pall Corporation | Branched filter and method of use |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1050559A (en) * | 1964-12-08 | |||
| GB1066546A (en) * | 1963-05-21 | 1967-04-26 | Union Tank Car Co | Fluid filtering apparatus |
| GB2067087A (en) * | 1980-01-14 | 1981-07-22 | Swinney Eng | A filter |
-
1984
- 1984-03-26 GB GB08407752A patent/GB2137110A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1066546A (en) * | 1963-05-21 | 1967-04-26 | Union Tank Car Co | Fluid filtering apparatus |
| GB1050559A (en) * | 1964-12-08 | |||
| GB2067087A (en) * | 1980-01-14 | 1981-07-22 | Swinney Eng | A filter |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5123944A (en) * | 1989-12-23 | 1992-06-23 | Btr Plc | Removable filter units |
| AU639515B2 (en) * | 1989-12-23 | 1993-07-29 | Btr Plc | Improvements in and relating to removable filter units |
| GB2239195B (en) * | 1989-12-23 | 1993-08-04 | Btr Plc | Improvements in and relating to removable filter units |
| GB2239195A (en) * | 1989-12-23 | 1991-06-26 | Btr Plc | Mounting of filter units |
| US7815805B2 (en) | 1996-07-12 | 2010-10-19 | Entegris, Inc. | Connector apparatus and system including connector apparatus |
| EP0870921A2 (en) * | 1997-04-08 | 1998-10-14 | Lucas Industries Public Limited Company | Filter arrangement |
| EP0870921A3 (en) * | 1997-04-08 | 1999-06-16 | Lucas Industries Public Limited Company | Filter arrangement |
| US7954647B2 (en) | 2000-05-12 | 2011-06-07 | Pall Corporation | Filters |
| EP1366789A1 (en) * | 2002-05-10 | 2003-12-03 | Hydraulik-Ring Gmbh | Filter cartridge (for liquids) which can be destroyed by freezing especially for fuel cell vehicles and combustion engines preferably diesel engines |
| US8074673B2 (en) | 2004-05-18 | 2011-12-13 | Hydraulik-Ring Gmbh | Freeze-resistant metering valve |
| US8266892B2 (en) | 2007-01-25 | 2012-09-18 | Friedrich Zapf | Calibrated dosing unit, especially of an exhaust gas treatment unit |
| US8875491B2 (en) | 2007-01-25 | 2014-11-04 | Cummins Ltd. | Exhaust gas aftertreatment system and method |
| US8201393B2 (en) | 2008-03-05 | 2012-06-19 | Hilite Germany Gmbh | Exhaust-gas aftertreatment device |
| US8959895B2 (en) | 2008-03-05 | 2015-02-24 | Cummins Ltd. | Exhaust-gas aftertreatment device |
| US8938949B2 (en) | 2009-08-03 | 2015-01-27 | Cummins Ltd. | SCR exhaust gas aftertreatment device |
| US8875502B2 (en) | 2010-12-14 | 2014-11-04 | Cummins Ltd. | SCR exhaust gas aftertreatment device |
| EP3970828A1 (en) * | 2020-09-18 | 2022-03-23 | Pall Corporation | Branched filter and method of use |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8407752D0 (en) | 1984-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |