US2408741A - Self-cleaning straining device - Google Patents

Self-cleaning straining device Download PDF

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Publication number
US2408741A
US2408741A US548988A US54898844A US2408741A US 2408741 A US2408741 A US 2408741A US 548988 A US548988 A US 548988A US 54898844 A US54898844 A US 54898844A US 2408741 A US2408741 A US 2408741A
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Prior art keywords
basket
housing
cleaning
helix
self
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US548988A
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William R Dodge
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HAJOCA Corp
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HAJOCA CORP
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    • 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
    • B01D29/31—Self-supporting filtering elements
    • B01D29/35—Self-supporting filtering elements arranged for outward flow filtration
    • B01D29/356—Self-supporting filtering elements arranged for outward flow filtration open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of 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
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
    • B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element

Definitions

  • My invention relates :to 'mproved method and means for straining fluids and liquids.
  • - Fig. 1 is a ⁇ centr a l vertical; section. v
  • the device herein described suitably effecting thejinvention, comprises"thechambered body or housing l5 provided atthe top'with an'inlet port "I6 and a discharge'portl'l.
  • This housing is providedwith an inw'a'rdlyiprojecting annular flange l8 nearth'e topand cooperating in forming an intakejspace' fl 9 fonreceivingthe fluid entering at IS.
  • a basket 22 hasa"foraminous wall, that is providedwith perforations such wall. This basket is supporte'd at the top by the flange l8. It is alsosuppo -tediat the'bottom by a plug if ormation"24' threaded into the bottom of the housing; 'Q
  • the basket '22 is cylindrical in form 'open at the top to the intake space l9, and spaced from the surrounding wall of the housing l5.
  • This space 20 surrounding the fluid delivered throughthe perforations. and delivers the same to the discharge IT.
  • the housing is adapted to be opened at the top and at the bottom. Suitable closure elements tral vertic l section on the -line I 1, 1944. serial No. 4 ,9 9;
  • a shearing blade in the form of a helix is mounted in the basket on be'ari'ngsat either end; 'This'shear'in'g element is formed into'ahelix mounted upon a rotatable shaft; co-axial withthe basket-the perimeter of the helix having a close movable fit with the inner wall of the basket 7 Y
  • the plug formation 24 is v a threaded into the open lower end of the housing l5 and serves to close said lower end when in operation,or to'open aid' r for cleaning (blow down) orthe ⁇ Mofeparticularly the formation 24 is funnelshapd' as ajt i le provided with an annular flange 2 4 -for receiving the loWer e'n'dj of the basket22.
  • a plug controlled port 24 is provided irf-the losure disc 2 4 forfurther or supplemental control.
  • v H The top of the housing [5 may also bev opened and closed by means of a cover-plate; cross-bar as 26 in its withdrawing the straining baske and set-screws, in which case asuitable bail 25 maybe used.
  • asuitable bail 25 maybe used.
  • I his bail 25 is an archformati'on having its 'lower ends secured to the tQ p' Of the basket 22 and furnishesconvenient means for v V basket from the housing and for replacing said basket within said housing.
  • the helix 39 is mounted upon a shaft 32, also coaxial with the basket, by means of a number of radial arms 31 secured to the spindle or shaft 32.
  • the shaft is mounted in bearingsof cross bars 33 and 34 at the top, and bottomof the basket. These bearings are supported onsuitable crosspieces associated with the housing.
  • are all fixed upon the shaft 32.
  • a washer 35* is slidably mounted on shaft 32 and adapted to rest upon the cross bar 34.
  • a spring 31 is positioned upon the shaft 32, between the lowermost radial arm 31 and said -bearing in By this arrangement, when the cross bar 34. helix is pushed downwardly the spring :is com.-
  • the angle ring is shown insections,inlligs. ,1 and .2, and comprises ;a .strip ;of .metal havin parallel extensions in planes at r ht angles and cooperates with the flanges 18 in the support of the basket.
  • the maxim tobe strained is introduced throughinlet 16,;1ntoinlet chamber I 9 a d ence into..ibasket.22. From .basketzzthe ul o he med um passesthr ueh th p r ati in the wall ofth as et 22 t t spa e 9 between the basketrandthe :Wall of the housing [5 and thence to theoutlet or discharge port I'l.
  • The-helix may be made of sheetmetal or cast and may varyin-gaugeas circumstances require.
  • the operation employing, the helix is as follows: The medium flowing into the top of th,e"bask.et 22, will directly enco'unterthe helix blade. and, due to the differential pressure or flowfrominlet IE .to outlet l1, will cause the rotation of said helix. Meanwhile part of the -medium will pass out through the perforations 26 into the space 20 within the housing.
  • Animpertant :fe ture :of :the invention is; that when .the 'rnrass ;of medium projecting into the baske issheared. the sa nagqesinto andibecomes "part of .-th;e-m 1strainie;d:medi ni :in the basket,
  • the :s idma-ss of: unstre ned medium may be reduced or even eliminated. This will igesnlt in savin ;ofitimetanmmaterial, fl'llntcissto say, the, mass may be gradually Worn; away, or .sufiiciently reduced, to permitiitsr passing through'the perforationfand become :part of the strained medium. l 1 I It will also be notedthattherotation ofthe helical blade-withinthebasket-will"increase the agitation oft hefluid passing therethroll h which will facilitate the straining action? What I claim is: j'
  • a filtering device In a filtering device, thehombination of acasing'ope'n at the top andbottom'andprovided at its upper portion with .an annular, lateral, v-inwardly projeotingefiangaa hollow .plug member 'closing the lower end of'the casing and provided with anupwardly extendinginverted conical'portion and having an outlet for. 'so'1ids.,.a perforated open ended cylindrical basket arranged ,within the casingandspaced from. the .walls thereof and ,seated'upon saidoonical portion having its.

Description

Get. 8, 1946. w. R. DODGE 2,408,741
I SELF-CLEANING STRAINING DEVICE v Filed Aug. 11, 1944 .z sneetsrsheet 1 I Ill/61220,":
Oct. 8; 1946. WRDODGE 2,408,741
SELF- CLEANING STRAINING DEVICE Filed Aug. 11, 1944 2 ShetS-ShGet 2 )fllzbmiii Jaye,
Iwmm
1 wastesl g r M I I To providefimprovements' inconstruction; as- I sembly and action. inorderito attain :efiiciency r I Fig; is"a"plan section Patented Oct. 8, 1946 I I w 1.1-. =.I t. 1 1 in p. 7
sstr cms me STRAINING DIJVICE v I R. Dodge,Aldan,Pagassignor to Hajoca l C rporation, a corporation of Delaware I I i pi' 'Applicatien August 1 '1 clai (01.210-167) My invention relates :to 'mproved method and means for straining fluids and liquids.
The following are among my objects:
To improve the method -of maintaining the strainer unit clean', .wh'ile operatin thereby securing'the maximum of efficiency" 7 To conserve a substanti l bulk offoreign material'which would ordinarily go to waste. r
v :To utilize the pressure of the fluid passing frominlet to discharge :to provide the power necessary for: the cleaning operation; 1 Y 1 To provideia shearing action upon the foreign material adhering'f-to the str'ainer-unit in order to separate smallerrpart's of foreign matter from larger parts, in order to prevent unnecessary and economy as a;whole.. -V .1 #Referring to; the drawings, Which. illustrate merely by way of example, suitable means for et ng invemiQn.-., r.
- Fig. 1 is a} centr a l vertical; section. v
Fig. 2 ,isa .cen
2-2 of Fig.1. 7 t I w Fig. 3.is a fragmentary sectionon a larger Sean V l a.
' F g.1; isia detail in' elevation of itlheshaft' for ""iFigj l is atop 'planview of the helix'g f {the line 5 -5 or Fig."2.: I 5, I Similar numerals referto similar parts throughout the several views. 3 V The device herein described suitably effecting thejinvention, comprises"thechambered body or housing l5 provided atthe top'with an'inlet port "I6 and a discharge'portl'l. This housing is providedwith an inw'a'rdlyiprojecting annular flange l8 nearth'e topand cooperating in forming an intakejspace' fl 9 fonreceivingthe fluid entering at IS. A basket 22hasa"foraminous wall, that is providedwith perforations such wall. This basket is supporte'd at the top by the flange l8. It isalsosuppo -tediat the'bottom by a plug if ormation"24' threaded into the bottom of the housing; 'Q
The basket '22 is cylindrical in form 'open at the top to the intake space l9, and spaced from the surrounding wall of the housing l5.
This space 20, surrounding the fluid delivered throughthe perforations. and delivers the same to the discharge IT.
The housing is adapted to be opened at the top and at the bottom. Suitable closure elements tral vertic l section on the -line I 1, 1944. serial No. 4 ,9 9;
less similar to "constructions are provided for said openings as shown. A hand; to the basket for con-- dle'or bail is see re venience in handling. J
The construction so far described is more or found in the prior art In accordance with my invention a shearing blade in the form of a helix is mounted in the basket on be'ari'ngsat either end; 'This'shear'in'g element is formed into'ahelix mounted upon a rotatable shaft; co-axial withthe basket-the perimeter of the helix having a close movable fit with the inner wall of the basket 7 Y The jphrase"foreign "material? as used "in this case is intended to include any particles or substance in or of "the liquid that will not normally pass through the perforations; 'The plug formation 24 is v a threaded into the open lower end of the housing l5 and serves to close said lower end when in operation,or to'open aid' r for cleaning (blow down) orthe {Mofeparticularly the formation 24 is funnelshapd' as ajt i le provided with an annular flange 2 4 -for receiving the loWer e'n'dj of the basket22.
Below thefunnel-sh'aped formation is a closure "disciz l f'or gaining-access to the housing, Where- 'by the basket may be inserted or withdrawn from the housing. A plug controlled port 24 is provided irf-the losure disc 2 4 forfurther or supplemental control.
v H The top of the housing [5 may also bev opened and closed by means of a cover-plate; cross-bar as 26 in its withdrawing the straining baske and set-screws, in which case asuitable bail 25 maybe used. I his bail 25 is an archformati'on having its 'lower ends secured to the tQ p' Of the basket 22 and furnishesconvenient means for v V basket from the housing and for replacing said basket within said housing.
Thedevice and o eration, so far as above dcaccordance withthe com.-
Among the difficulties encountered" in said theistrainingoperation and results in waste'cf the basket, receives time and material. r 1
Such trouble arises differently indifferent types 'of'material,"and the object of the presentinvenpracticejis the tendency. of the t to gather upon its surface,- a coating eof foreign material, that greatlyimpedes The perimeter of the helix is normally co-aXial with that of the cylindrical basket.
The helix 39 is mounted upon a shaft 32, also coaxial with the basket, by means of a number of radial arms 31 secured to the spindle or shaft 32.
The shaft is mounted in bearingsof cross bars 33 and 34 at the top, and bottomof the basket. These bearings are supported onsuitable crosspieces associated with the housing.
The radial arms 3| are all fixed upon the shaft 32. A washer 35* is slidably mounted on shaft 32 and adapted to rest upon the cross bar 34. .A spring 31 is positioned upon the shaft 32, between the lowermost radial arm 31 and said -bearing in By this arrangement, when the cross bar 34. helix is pushed downwardly the spring :is com.-
pressed; when however the spring is permitted to react, the helix is slightly elevated.
When the shaft 32 is spring-actuated upwardly,; the washer BSlimits thisspring-actuated .up- .Ward movement oftheshaf-t-BZ.
The angle ring is shown insections,inlligs. ,1 and .2, and comprises ;a .strip ;of .metal havin parallel extensions in planes at r ht angles and cooperates with the flanges 18 in the support of the basket.
Inthe usual practice, the mediu tobe strained is introduced throughinlet 16,;1ntoinlet chamber I 9 a d ence into..ibasket.22. From .basketzzthe ul o he med um passesthr ueh th p r ati in the wall ofth as et 22 t t spa e 9 between the basketrandthe :Wall of the housing [5 and thence to theoutlet or discharge port I'l.
If the, medium containsparticles of foreignmarial in appr ci ble Qua tity t a ill not immediately pass through .theperforations in the basket wall, thesaid materialisheld in suspension in the fluid until a substantialpart of same has passed through the perforations.
,Such common practice has a number of objections. For example-the foreign material which is separated from thebody of the medium has a tendency to adhere -totthe inner surface of the basket wall. 'Ihis;interfere s=with the straining,
operation. This trouble increases as the accumulation on the basket wall increases; thus requiring'frequent cleaning of .thebasket which is ex- ,pensiveandwasteful.
The means and method in accordance with my invention serve to overcome the above cited objections H The bearings in cross bars 33 and 34 are sufficiently loose to permit not only vertical and rotative movement but alsoslightrocking or side- 1,
way motion for the purpose to be described. In certain cases it may be desirable to provide-ball bearings. The-helix may be made of sheetmetal or cast and may varyin-gaugeas circumstances require.
The operation employing, the helix is as follows: The medium flowing into the top of th,e"bask.et 22, will directly enco'unterthe helix blade. and, due to the differential pressure or flowfrominlet IE .to outlet l1, will cause the rotation of said helix. Meanwhile part of the -medium will pass out through the perforations 26 into the space 20 within the housing.
,In accordance with the method and means of the present invention, these objectionsare largely .overcome. For example:
ing space 20. In this way material is saved and thetimezrequired in frequent cleaning also saved.
As the rotation of the helix is continuous it fol- -'lows that thereis-no time for undesirable accumulation-of particles.
. -When -the;partof the foreign material which projects into the basket is sheared from the part lodged'in said perforation there is nothing to hold the balance of said foreign matter from passing into the .filtered liquid :zpassing :through the housing. if
When: a up article; of z-foreign zmaterial, happens :ztO be,.cf. .such;cha1tacter1asuto render it .difiioult to -di Qlge :from a1znerforation, the difficulty, cantbe largely overcomerby'gthe. mounting ,of;the; helix.
Animpertant :fe ture :of :the invention is; that when .the 'rnrass ;of medium projecting into the baske issheared. the sa nagqesinto andibecomes "part of .-th;e-m 1strainie;d:medi ni :in the basket,
while the balance of ,saidxnhSs medium. remain- :ineih he peri ratinn willgoiintothe (strained nedi .u-iir uns -u asaid asket. V Thi operation lay bezrep atedzfmm time .1110
time. the :s idma-ss of: unstre ned medium may be reduced or even eliminated. This will igesnlt in savin ;ofitimetanmmaterial, fl'llntcissto say, the, mass may be gradually Worn; away, or .sufiiciently reduced, to permitiitsr passing through'the perforationfand become :part of the strained medium. l 1 I It will also be notedthattherotation ofthe helical blade-withinthebasket-will"increase the agitation oft hefluid passing therethroll h which will facilitate the straining action? What I claim is: j'
In a filtering device, thehombination of acasing'ope'n at the top andbottom'andprovided at its upper portion with .an annular, lateral, v-inwardly projeotingefiangaa hollow .plug member 'closing the lower end of'the casing and provided with anupwardly extendinginverted conical'portion and having an outlet for. 'so'1ids.,.a perforated open ended cylindrical basket arranged ,within the casingandspaced from. the .walls thereof and ,seated'upon saidoonical portion having its. upper end arranged within the annulusdefined'bysaid inw dly pr je tin flan e, .cress bars p vided with bear fig an located in said. conical portion andin the toppfthe baskeaja shaft journaledjin .said bearings, gahe'lic'al .blade mounted on said shaft in close proximity .to ,said basket for .rota- .ti'on and for .shearingmaterial projecting from ,theinter-ior.ofth'lbasket .wall, aninlet in line with .the uppenopen end of ,thebasket and. an outlet located at the top of the casing ,andcommunicating with the space between the .casing and the basket.
' 2R. .DQDGE.
US548988A 1944-08-11 1944-08-11 Self-cleaning straining device Expired - Lifetime US2408741A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678732A (en) * 1949-06-08 1954-05-18 Banks John Fluid strainer
US2873026A (en) * 1955-08-29 1959-02-10 Garmt J Nieuwenhuis Method and apparatus for preparing and filtering animal blood for drying
DE1225440B (en) * 1961-05-31 1966-09-22 Daimler Benz Ag Filters for cleaning the lubricating oil for auxiliary units, especially for the exhaust gas turbocharger, of internal combustion engines
US3286843A (en) * 1965-08-20 1966-11-22 Jr Frederick Kraissl Self-cleaning filter
US4003837A (en) * 1973-05-29 1977-01-18 Osborne Winston G Self-cleaning strainer
US4054528A (en) * 1976-09-28 1977-10-18 Treiber Kenneth L Self-cleaning strainer or filter
FR2548047A1 (en) * 1983-06-30 1985-01-04 Rehman Process Eng PRESSURE REACTOR WITH SELF-CLEANING FILTERING DEVICE
FR2677265A1 (en) * 1991-06-06 1992-12-11 Beaudrey & Cie Filter with stationary strainer
US20130126411A1 (en) * 2010-07-22 2013-05-23 Marinvent Gmbh Filter for a feeding system for liquids with tendency to form sediments, in particular for a crude oil washing system
WO2016171030A1 (en) * 2015-04-20 2016-10-27 富士フィルター工業株式会社 Filtration unit
US20200179991A1 (en) * 2018-12-05 2020-06-11 Iwt S.R.L. System for treating wash waste liquid, adapted for application in a continuous tunnel washing machine in the field of preclinical pharmaceutical research
US10751648B1 (en) * 2019-08-09 2020-08-25 Durwood Nelson Renfrow Apparatus and system for removing liquid from slurry
US20210394093A1 (en) * 2019-08-01 2021-12-23 Yanshan University Consumption-free high-efficiency filter
US11207617B2 (en) * 2018-05-05 2021-12-28 Arai Machinery Corporation Shearing member and filtration device
US20220001310A1 (en) * 2018-11-14 2022-01-06 Bollfilter Nordic Aps Filter candle and method for operating such filter candle
US11484818B2 (en) * 2019-02-11 2022-11-01 North Carolina State University Self-cleaning screen

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678732A (en) * 1949-06-08 1954-05-18 Banks John Fluid strainer
US2873026A (en) * 1955-08-29 1959-02-10 Garmt J Nieuwenhuis Method and apparatus for preparing and filtering animal blood for drying
DE1225440B (en) * 1961-05-31 1966-09-22 Daimler Benz Ag Filters for cleaning the lubricating oil for auxiliary units, especially for the exhaust gas turbocharger, of internal combustion engines
US3286843A (en) * 1965-08-20 1966-11-22 Jr Frederick Kraissl Self-cleaning filter
US4003837A (en) * 1973-05-29 1977-01-18 Osborne Winston G Self-cleaning strainer
US4054528A (en) * 1976-09-28 1977-10-18 Treiber Kenneth L Self-cleaning strainer or filter
FR2548047A1 (en) * 1983-06-30 1985-01-04 Rehman Process Eng PRESSURE REACTOR WITH SELF-CLEANING FILTERING DEVICE
DE3325203A1 (en) * 1983-06-30 1985-01-10 Rehman Process Engineering GmbH, 7800 Freiburg PRESSURE REACTOR
FR2677265A1 (en) * 1991-06-06 1992-12-11 Beaudrey & Cie Filter with stationary strainer
US20130126411A1 (en) * 2010-07-22 2013-05-23 Marinvent Gmbh Filter for a feeding system for liquids with tendency to form sediments, in particular for a crude oil washing system
EP3287179A4 (en) * 2015-04-20 2019-01-02 Fuji Filter Manufacturing Co., Ltd. Filtration unit
US11691100B2 (en) 2015-04-20 2023-07-04 Fuji Filter Manufacturing Co., Ltd. Filtration unit
WO2016171030A1 (en) * 2015-04-20 2016-10-27 富士フィルター工業株式会社 Filtration unit
US10828583B2 (en) 2015-04-20 2020-11-10 Fuji Filter Manufacturing Co., Ltd. Filtration unit
CN112892044A (en) * 2015-04-20 2021-06-04 富士滤机工业株式会社 Filter unit
JP2016203070A (en) * 2015-04-20 2016-12-08 富士フィルター工業株式会社 Filtration unit
CN112892044B (en) * 2015-04-20 2022-09-09 富士滤机工业株式会社 Filter unit
US11207617B2 (en) * 2018-05-05 2021-12-28 Arai Machinery Corporation Shearing member and filtration device
US11872507B2 (en) * 2018-11-14 2024-01-16 Bollfilter Nordic Aps Filter candle and method for operating such filter candle
US20220001310A1 (en) * 2018-11-14 2022-01-06 Bollfilter Nordic Aps Filter candle and method for operating such filter candle
US20200179991A1 (en) * 2018-12-05 2020-06-11 Iwt S.R.L. System for treating wash waste liquid, adapted for application in a continuous tunnel washing machine in the field of preclinical pharmaceutical research
US11648592B2 (en) * 2018-12-05 2023-05-16 Iwt S.R.L. System for treating wash waste liquid, adapted for application in a continuous tunnel washing machine in the field of preclinical pharmaceutical research
US11484818B2 (en) * 2019-02-11 2022-11-01 North Carolina State University Self-cleaning screen
US20210394093A1 (en) * 2019-08-01 2021-12-23 Yanshan University Consumption-free high-efficiency filter
US11845023B2 (en) * 2019-08-01 2023-12-19 Yanshan University Filter with passive-rotation filter flements
US10751648B1 (en) * 2019-08-09 2020-08-25 Durwood Nelson Renfrow Apparatus and system for removing liquid from slurry

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