WO2015180815A1 - Dispositif filtrant - Google Patents

Dispositif filtrant Download PDF

Info

Publication number
WO2015180815A1
WO2015180815A1 PCT/EP2015/000885 EP2015000885W WO2015180815A1 WO 2015180815 A1 WO2015180815 A1 WO 2015180815A1 EP 2015000885 W EP2015000885 W EP 2015000885W WO 2015180815 A1 WO2015180815 A1 WO 2015180815A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
valve
filter element
valve piston
housing
Prior art date
Application number
PCT/EP2015/000885
Other languages
German (de)
English (en)
Inventor
Alexander WOHLERS
Viktor Josef Lauer
Philipp Hilzendegen
Norbert Sann
Original Assignee
Hydac Filtertechnik Gmbh
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 Hydac Filtertechnik Gmbh filed Critical Hydac Filtertechnik Gmbh
Priority to EP15720263.1A priority Critical patent/EP3148670A1/fr
Publication of WO2015180815A1 publication Critical patent/WO2015180815A1/fr

Links

Classifications

    • 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
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/157—Flow control valves: Damping or calibrated passages
    • B01D35/1573—Flow control valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/16—Valves
    • B01D2201/165—Multi-way valves

Definitions

  • the invention relates to a filter device with at least one filter element, which is accommodated in a filter housing which has at least two connection points, which serve alternately the supply of unfiltrate and the removal of filtrate, wherein by means of a reversing device of the respective connection points In the direction reversing fluid flow passes through the filter element in only one predeterminable direction.
  • the flow direction of the fluid flow in the piping system may change, depending on the respective operating conditions. Since the filter elements used for the filtration of the fluids in question may only be operated in one direction of flow due to the design, it is apt to dispense with filtration in circuits with reversing flow directions. However, in view of the high demands which such systems have to make on the purity of the fluids in order to avoid damage or failure of the hydraulic components of the system, the absence of filtration is only rarely acceptable.
  • the invention has the object to provide a filter device of the type mentioned is available, which is characterized by a simple, compact and inexpensive to produce.
  • the reversing device comprises a valve slide device, the valve piston is driven by the respective Unfiltratstrom, which is present at one or the other connection point, provides the operating pressure itself, from one connection point or from the other Connection point forth, the control pressure for switching the valve slide device in the switching position, in which the unfiltered stream passes to the raw side of the filter element.
  • the invention is characterized by low construction costs and a compact design with low production costs. With only one valve located in the fluid flow pressure losses are also minimized.
  • valve piston which is pressure-actuated directly from the unfiltrate
  • the control of the connection points from unfiltrate feed to filtrate removal and vice versa is essentially instantaneous or simultaneous.
  • the Switching movements of the valve piston almost instantaneously, when the valve piston is mounted freely movable in the valve housing.
  • the arrangement can advantageously be made so that the valve piston is fluid-conducting connected at its opposite end faces, each having a connection point at which alternately the Unfiltratstrom with a predetermined pressure, ie the operating pressure of the device is present.
  • the valve piston can each have a hollow chamber which, separated from one another by a wall part, has at least one passage opening which connect depending on the displacement position of the valve piston passages in the valve housing with the respective hollow chamber or lock them.
  • the valve piston itself, with its separate hollow chambers, forms the fluid guide between the outer connection points and those passage points of the valve housing which, depending on the switching position of the valve piston, lead to the raw side or the clean side of the filter element.
  • valve housing may be part of the filter housing or flanged as a separate block.
  • valve housing is an integral part of a Filterkop- fes, to the formation of the filter housing, a filter pot with the filter element can be connected, wherein the passage points in the valve housing are formed from annular channels, one of which is connected to the raw side of the filter element and depending on the displacement position of the valve piston, the other on the clean side.
  • a middle annular channel of a group of three ring channels in two tangentially merging connecting channels, which are connected to the raw side of the filter element pass over, receive a collecting channel to the clean side of the filter element between them, which merges into two branch lines, one of which in an annular channel and from which the other flows into the other ring channel.
  • low flow losses occur during operation.
  • the valve slide device can be integrated with its valve housing in the filter element which, with its preferably pleated filter mat, comprises the valve housing at a predeterminable distance.
  • the filter device can also be designed as a low-cost filter without the possibility of an element change, as well as a serviceable version with removable filter element. Due to the compact design, the filter device can also be integrated as an in-line filter in hose lines of the relevant system.
  • the arrangement is advantageously made so that the filter element received in the filter housing to the outside limits the raw side and the inside with the clean side.
  • the valve housing may have two pairs of grouped passageways, with the two being furthest from each other spaced passages alternately supply the raw side of the filter element with unfiltered material and serve to these adjacent passage points of each pair depending on the Verfahr ein the valve piston, alternately connected to the clean side of the filter element, the removal of the filtrate.
  • Fig. 2 is a symbol representation of the hydraulic circuit of a
  • Fig. 3 is a drawn with a housing interruption
  • Fig. 4 is a longitudinal section of the embodiment according to the section line IV - IV of Fig. 3 and a longitudinally cut drawn perspective view of a second embodiment of the filter device according to the invention.
  • FIG. 1 shows a device according to the prior art constructed in the manner of a Graetz circuit for rectifying a fluid flow flowing through a filter element 3.
  • an operating state is shown in which at the junction A of the circuit unfiltered material flows under an operating pressure and at a junction B of the circuit filtrate flows after the fluid has passed through the filter element 3 in the direction indicated by flow arrow 5 direction.
  • the device has four seat valves, which can each be flowed through in only one flow direction and are each formed by spring-loaded check valves. Of these, there is a first check valve 7 between the connection point A and the non-filtrate input U of the filter element 3.
  • a second check valve 9 is arranged between the second connection point B and the non-filtrate input U of the filter element 3.
  • the check valves 7 and 9 are each oriented such that the fluid path is released from the connection point A to Unfiltrateingang U pending at port A unfiltrate via the check valve 7 or that at pending at the junction B Unfiltrat réelle the connection via the check valve 9 to the unfiltered input U is released.
  • a third check valve 1 1 and a fourth check valve 13 are a third check valve 1 1 and a fourth check valve 13, each blocking the connection to the unfiltrate pressure leading junction A or B, but the connection between see filtrate outlet F and release the connection point A or B, at which no unfiltrate pressure is present.
  • FIG. 2 shows the circuit of the reversing device for an embodiment of the filter device according to the invention.
  • a valve slide device in the form of a hydraulically operated 4/2-way valve 15 is provided, the valve piston 1 7 on the left side in Fig. 2 located end face with the fluid pressure of the junction A and on the opposite end face with the Fluid pressure of the junction B is acted as control pressure.
  • Fig. 2 shows the switching position of the valve piston 1 7 prevailing at the junction B unfiltrate, wherein the connection is made from the junction B to the unfiltered input U of the filter element 3 and the filtrate output F is connected to the connection point A.
  • the valve piston moves 1 7 in Fig. 2 to the right, so that the junction A with the unfiltered inlet U is in communication and the filtrate F is connected to the junction B.
  • valve slide device 15 is part of a filter head 19 which forms a filter housing together with a detachably attachable to him filter pot 21, in which the filter element 3 can be accommodated.
  • This can be flowed through in the filtration operation from outside to inside, so that the Room 23 between the outside of the filter element 3 and the inside of the filter cup 21, the raw side and thus the unfiltered input U forms.
  • the filter element 3 has in the usual manner with filter cartridges on a hollow cylindrical filter mat surrounding a concentric to the filter longitudinal axis 25, inner filter cavity, which forms the clean side, wherein the filtrate F is coaxial with the connection to the filter head 19.
  • each hollow chamber 35 and 37 has a ring of passage openings 41 and 43, respectively.
  • the passage openings 41 and 43 are aligned on passageways formed in the valve housing 27 by annular channels 45, 47 and 49 which surround the valve axis 29 concentrically and arranged in a group of three are, wherein the central annular channel 47 is aligned with the longitudinal axis 25.
  • This middle annular channel 47 is, as shown in FIG. 4 can be removed via two connecting channels 51 and 53, the tangenti- ally open into the annular channel 47 and extend parallel to the longitudinal axis 25 with the unfiltrateingang U, ie with the space 23 of the crude side connected in the filter housing.
  • the outer annular channels 45 and 49 are connected via an obliquely extending connecting line 55 and 57 with the filtrate output F in combination.
  • the valve piston 1 7 In the operating state shown in FIGS. 3 and 4, in which, in accordance with the state shown in Fig. 2, the unfiltered pressure is present at the junction B, the valve piston 1 7 is in the left-side switching position, wherein the through holes 43rd are aligned with the central annular channel 47 so that unfiltered material passes from the annular channel 47 via the connecting channels 51 and 53 (FIG. 4) to the chamber 23 of the crude side.
  • the other passage openings 41 are aligned with the left side annular channel 45, so that the filtrate output F via the connecting line 55, the through holes 41 and the hollow chamber 35 with the connection point A is in communication.
  • the annular channel 49 is closed by the valve piston 1 7, so that the connection between the junction B and the unfiltered output F is blocked.
  • the through-openings 41 are in alignment with the central annular channel 47, so that now the unfiltered material via the connection channels 51, 53 (FIG. 4) to the space 23 passes, while the passage openings 43 are aligned with the annular channel 49, so that the filtrate flows from the filtrate output F via the connecting line 57 to the connection point B.
  • FIG. 5 shows an exemplary embodiment in which the valve slide device 15 is installed in the filter housing 61. More specifically, the valve housing 63 is disposed concentrically within the clean-side forming filter cavity 65.
  • the valve piston 1 7 corresponds to the example described above, thus has hollow chambers 35 and 37 emanating from the end faces, which are separated by a wall 39 adjacent to which the through openings 41 and 43 are located.
  • two pairs of ports are formed in the wall of the valve housing 63, each pair being located near an end of the valve housing 63, each pair having a rim of Passages has. These are denoted by 69 and 71 in the upper pair in FIG. 5 and 73 and 75 in the lower pair.
  • FIG. 5 shows the operating state in which the unfiltrate pressure is present at the connection point A, so that the valve piston 1 7 is moved downwards in the FIGURE.
  • the valve piston 1 7 releases the passage points 69 in this position, so that the unfiltered material reaches the dirty side 77 on the outside of the filter element 3.
  • the through-openings 43 of the valve piston 1 7 are aligned with the passage points 73 of the lower pair so that filtrate enters the hollow chamber 37 via the through-openings 43 and flows out via the connection point B from the room forming the clean side.
  • the passage points 75 of the lower pair are released, so that unfiltered material from the junction B to the raw side 77 passes.
  • Filter housing 61 one of the housing end portions 81 or 83 may be formed as a lid which is removable to allow replacement of the filter element 3 by this is withdrawn together with its end caps 85 and 87 from the green body forming a valve housing 63.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L'invention concerne un dispositif filtrant comprenant au moins un élément filtrant (3) qui est logé dans un boîtier de filtre (19, 21, 61), lequel dispose d'au moins deux points de raccordement (A, B) qui servent en alternance à l'arrivée de produit à filtrer et à l'évacuation du filtrat. Un système de changement de direction (15) est utilisé pour que le courant de fluide, qui change de direction entre les points de raccordement (A, B), ne traverse l'élément filtrant (3) que dans une seule direction prédéfinissable. L'invention est caractérisée en ce que le système de changement de direction possède au moins un système de tiroir de vanne (15) dont le piston de vanne (17), guidé dans un corps de vanne (27 ; 63), commandé par le courant de produit à filtrer correspondant dans le point de raccordement (A, B) pouvant être associé par le biais du côté brut (23 ; 77) de l'élément filtrant (3), libère le courant de fluide vers le point de raccordement (A, B) qui est raccordé au côté propre (F) de l'élément filtrant (3).
PCT/EP2015/000885 2014-05-24 2015-04-30 Dispositif filtrant WO2015180815A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15720263.1A EP3148670A1 (fr) 2014-05-24 2015-04-30 Dispositif filtrant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014007848.5A DE102014007848A1 (de) 2014-05-24 2014-05-24 Filtervorrichtung
DE102014007848.5 2014-05-24

Publications (1)

Publication Number Publication Date
WO2015180815A1 true WO2015180815A1 (fr) 2015-12-03

Family

ID=53051786

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/000885 WO2015180815A1 (fr) 2014-05-24 2015-04-30 Dispositif filtrant

Country Status (3)

Country Link
EP (1) EP3148670A1 (fr)
DE (1) DE102014007848A1 (fr)
WO (1) WO2015180815A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017125881B4 (de) 2017-11-06 2019-06-19 Sartorius Stedim Biotech Gmbh Filtermodul und Verfahren zum Nachweis von Mirkoorganismen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289841A (en) * 1962-12-26 1966-12-06 Michigan Dynamics Inc Bidirectional filter
DE1234120B (de) * 1963-01-22 1967-02-09 K & H Eppensteiner Fluessigkeitsfilter fuer hydraulische UEbertragungsanlagen mit wechselnder Druckrichtung, insbesondere fuer Ruderapparate od. dgl.
EP0070508A1 (fr) * 1981-07-20 1983-01-26 Pall Corporation Soupape bidirectionnelle coaxiale

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19819619A1 (de) * 1998-05-04 1999-11-11 Regeltechnik Friedrichshafen G Filtervorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289841A (en) * 1962-12-26 1966-12-06 Michigan Dynamics Inc Bidirectional filter
DE1234120B (de) * 1963-01-22 1967-02-09 K & H Eppensteiner Fluessigkeitsfilter fuer hydraulische UEbertragungsanlagen mit wechselnder Druckrichtung, insbesondere fuer Ruderapparate od. dgl.
EP0070508A1 (fr) * 1981-07-20 1983-01-26 Pall Corporation Soupape bidirectionnelle coaxiale

Also Published As

Publication number Publication date
EP3148670A1 (fr) 2017-04-05
DE102014007848A1 (de) 2015-11-26

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