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EP0069146A1 - Filtre en forme de v - Google Patents

Filtre en forme de v

Info

Publication number
EP0069146A1
EP0069146A1 EP82900688A EP82900688A EP0069146A1 EP 0069146 A1 EP0069146 A1 EP 0069146A1 EP 82900688 A EP82900688 A EP 82900688A EP 82900688 A EP82900688 A EP 82900688A EP 0069146 A1 EP0069146 A1 EP 0069146A1
Authority
EP
European Patent Office
Prior art keywords
channel
inlet channel
outlet channel
filter
millimeters
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Withdrawn
Application number
EP82900688A
Other languages
German (de)
English (en)
Inventor
Tadashi Hagihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Malin & Haley
Original Assignee
Malin & Haley
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 Malin & Haley filed Critical Malin & Haley
Publication of EP0069146A1 publication Critical patent/EP0069146A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/10—Filter screens essentially made of metal
    • 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
    • B01D29/01—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 flat filtering elements
    • 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
    • B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
    • 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
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/904—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding directing the mixture to be filtered on the filtering element in a manner to clean the filter continuously

Definitions

  • a self cleaning slit filter plate having slits with an inlet channel with generally parallel flat side walls starting at the upper flat surface of the plate and having the inlet channel connected to an outlet channel having diverging planar opposed side walls.
  • Plate slit filters having intermediate transverse cross-sections with an inlet channel and outlet channel have been constructed in the past. Their cross-sections show a parallel wall inlet channel of relatively great width and/or depth as well as diverging wall outlet channel leaving pocket for the accumulation of foreign material outward of the intersection of the inlet channel and outlet channel.
  • the present invention is directed to very small plate slit filters with an outlet channel cross-section which works in complimentary relationship with fluid flow patterns to prevent build up of trash and debris in the channel.
  • the present invention makes the inlet channel shallower and the outlet channel correspondingly deeper and of a particular configuration.
  • a new and improved filter element including a plate between 1.0 and 10 millimeters thickness normally having a plurality of generally long filtering elements of a preferred thickness in the range of 1.5 and 5.0 millimeters.
  • the elements may be arranged in long generally parallel rows to insure symmetry of the cross-sectional shape of the filter channel including a portion with generally parallel sides and diverging generally V-shaped sides.
  • the arrangement of filter elements one to another can be of any form lending to ease of manufacturing and servicing.
  • the plate may take shapes such as a flat plate, circular plate, convex or concave plates or other shapes.
  • Each filter slit has a transverse cross- section that includes an inlet channel portion and outlet channel portion.
  • Each inlet channel portion intersects its respective outlet channel portion internal of the filter elements.
  • the inlet channel portion includes generally parallel planar opposed side walls.
  • the preferred inlet channel portion has flat, smooth parallel planar opposed side walls.
  • the outlet channel portion includes diverging planar opposed side walls.
  • the preferred outlet channel portion has flat, smooth diverging opposed side walls.
  • the entrance of the outlet channel intersects at the exit of said inlet channel and diverges outward to the exit of the outlet channel.
  • the depth of the inlet channel plus the depth of the outlet channel equal the total depth of the filter element.
  • the transverse cross-section of the outlet channel is a terminated "V" shape with the narrower portion intersecting the inlet channel.
  • the intersection may be a sharp point in cross- section or a curved line in cross-section.
  • the inlet channel connected to the outlet channel utilizes natural flow characteristics of the fluid to maintain a clean filter element..
  • Figure 1 is a partial planar view of the filter element from the upstream side.
  • Figure 2 is cross-section side view elevation of the filter element taken along line 2-2 in Figure
  • OMH Figure 3A is a cross-sectional view of the filter element taken along lines 3-3 in Figure 1 and looking in the directions of the arrows.
  • Figure 3B is another embodiment of the filter element shown in cross-section to illustrate the rounded intersection of the inlet channel and outlet channel.
  • Figure 4 is an enlarged view of one end of the filter slit.
  • Figure 5 is another enlarged view of another end of the filter slit.
  • Figure 6 is a cross-section of an additional filter element.
  • the filter plate 10 with an upstream surface 16 is constructed from stainless steel plate or other metals or other material in which there are a pluralit of through slits 12.
  • the plates preferr bly may be 1.5 to 5 millimeters thick, or thicker.
  • These filter slits 12, 12' and 12" are arranged in a plurality of generally parallel rows 32, 32', 32".
  • the filter elements may be arranged in other configurations.
  • the filter element may be straight as illustrated or in other configurations such as arcuate.
  • Each through slit 12, 12' and 12" comprises an inlet channel 20 intersecting the upstream surface or side 16 and an outlet channel 24 which exits the downstream side 18.
  • the inlet channel 20 and outlet channel 24 intersect at a line 12 as shown in Figure 2 and a point 34 and 34' as shown in Figure 3A internal of the filter element plate 10.
  • the inlet channel 20 is established in the upstream side 16 and the outlet channel 24 is established in the downstream side 18 by removal of material from the plate or by molding the plate.
  • the inlet channel 20 has smooth, flat parallel planar opposed side walls 36 and 36'.
  • the entrance is at surface 16.
  • the width of the channel is narrow.
  • the depth of the channel is shallow.
  • the outlet channel shown in Figure 3A have smooth, flat diverging planar opposed side walls 38 and 38' .
  • the outlet channel 24 diverges from its entrance at the intersection points 34 and 34' within the inlet channel 20.
  • the intersection between the inlet channel and outlet channel is important in that an abrupt fluid pressure drop is created at the intersection of the inlet channel and outlet channel preventing collection of debris within the filter element. No pockets, or undercuts are presented to the passing fluid.
  • the outlet channel is generally V-shaped, but may be of other shape which provide the self cleaning of the outlet walls by the passing liquid.
  • the depth of the inlet channel may be between 0.1 to 0.3 millimeters but may be of greater depth. The preferrable depth is 0.2 millimeters.
  • outlet channel Another possible version of outlet channel is to construct the outlet channel's transverse cross-section having a smooth arcuately convex shaped opposed diverging side walls having the inlet channels narrowest point at its entrance 50 diverging to its widest point 52 at the outlet channel exit.
  • the degree of divergence or angle 26 is between 40 to 60 degrees with a preferred included angle of 45-50 degrees. The angle being measured from the entrance point 34, 34' or A to the exit point B.
  • the filter element includes a plate that may be made from a stainless steel plate or other material including but not limited to plastic with suitable characteristics and wear properties.
  • the width C of the inlet slit at the entrance to the inlet channel is between 0.5 and 0.06 millimeters.
  • the cross-section area of the inlet channel may be a square area or a rectangular area.
  • the inlet surface or face 16 of the filter element plate on v. ⁇ .ich debris accumulates during filtration may be cleaned by a wiper or scraper blade 70 made of a suitable material moved relative to and across the face of the filter element plate, either parallel to the longitudinal axis of the filter slits as shown in Figure 2 or in a transverse direction.
  • the plate thickness may range from 10 to 1.5 millimeters.
  • the preferred thickness is 1.5 to 5 millimeters.
  • the inlet channel may have a depth 22 of preferrably 0.2 millimeters.
  • the depth 22 may vary from 0.1 to 0.3 millimeters.
  • the width C of the inlet channel entrance is between 0.5 millimeters to 0.06 millimeters.
  • the mid width is 0.2 millimeters.
  • the radius R may vary but is preferrably large to approximate the shape in Figure 3A.
  • the filter element may be used for liquids with viscosities above and below the preferred range.
  • the junction between the inlet channel and the outlet channel 34" and 34'" may have a radius or be arcuate to eliminate the sharp junction shown in Figure 3A.
  • Figure 4 illustrates a molded channel end 5 40 having straight smooth flat inlet channel portion or wall 42 and smooth flat outlet channel portion 44 that may have the same angles as sides 38 and 38".
  • the outlet surface may also be shaped as walls 38" and 38'" in Figure 6.
  • 10 Figure 5 shows another embodiment of a machined filter channel end 40' having an inlet channel with a smooth arcuate or radius surface 41.
  • the outlet channel portion 43 may also have a smooth arcuate or radius surface.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Element de filtre comprenant une plaque (10) dont l'epaisseur est comprise entre 1,0 et 10 millimetres et pourvue d'une pluralite d'elements filtrants de forme generalement allongee (12, 12', 12') dont l'epaisseur preferee est de 1,5 a 5,0 millimetres. Les elements (12, 12', 12') peuvent etre disposes en longues rangees generalement paralleles (32, 32', 32') comprenant une partie qui presente des cotes generalement paralleles et des cotes divergents en forme de V Chaque entaille (12) presente une section transversale comprenant une partie formant canal d'admission (20) et une partie formant canal d'echappement (24). Chaque partie (20) recoupe la partie correspondante (24) a l'interieur des elements filtrants. La partie (20) formant canal d'admission comporte des parois laterales opposees planes paralleles (36, 36'). De preference ces parois de la partie (20) sont lisses. La partie formant canal d'echappement (24) comporte des parois laterales opposes planes et divergentes (38, 38'). De preference ces parois de la partie (24) sont lisses. L'entree du canal d'echappement converge a la sortie (34, 34') du canal d'admission et diverge vers l'exterieur vers la sortie du canal d'echappement.
EP82900688A 1981-01-05 1982-01-05 Filtre en forme de v Withdrawn EP0069146A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US22255481A 1981-01-05 1981-01-05
US222554 1981-01-05

Publications (1)

Publication Number Publication Date
EP0069146A1 true EP0069146A1 (fr) 1983-01-12

Family

ID=22832691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82900688A Withdrawn EP0069146A1 (fr) 1981-01-05 1982-01-05 Filtre en forme de v

Country Status (2)

Country Link
EP (1) EP0069146A1 (fr)
WO (1) WO1982002345A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI67588C (fi) * 1983-01-26 1985-04-10 Ahlstroem Oy Silplaot
DE3800457C1 (fr) * 1988-01-09 1989-07-27 Metallgesellschaft Ag, 6000 Frankfurt, De
FR2630022B1 (fr) * 1988-04-19 1990-08-10 Sofil Procede et dispositif de filtration continue de liquides charges a debit ameliore
FI89521C (fi) * 1991-10-04 1993-10-11 Cae Investments Bv Foerfarande foer framstaellning av en silprodukt och genom foerfarandet framstaelld silprodukt
DE4324662A1 (de) * 1993-07-22 1995-01-26 Voith Gmbh J M Sieb
US6138838A (en) 1998-05-29 2000-10-31 J&L Fiber Services, Inc. Screen media and a screening passage therefore
JP3841054B2 (ja) * 2002-08-08 2006-11-01 株式会社デンソー フィルタおよびそれを用いた燃料噴射装置
CA2517507C (fr) * 2003-04-07 2013-03-12 Gambro Lundia Ab Filtre a cartouche, cartouche, utilisation du filtre dans la cartouche et systeme de preparation d'une solution liquide pour une procedure medicale

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US105755A (en) * 1870-07-26 Improved metallic-plate screen for screening paper-pulp
US1940952A (en) * 1933-12-26 Screen plate
US206632A (en) * 1878-07-30 Improvement in perforated tiles for draining paper-stock and for other purposes
US1916393A (en) * 1931-09-23 1933-07-04 Richmond W Smith Pulp screen plate
SE315479B (fr) * 1963-10-21 1969-09-29 Knutsilplatar Malm N Ab

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8202345A1 *

Also Published As

Publication number Publication date
WO1982002345A1 (fr) 1982-07-22

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830317

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HAGIHARA, TADASHI