SE190750C1

SE190750C1 -

Info

Publication number: SE190750C1
Authority: SE
Publication date: 1964-01-01

Description

Uppfinnare: R E Liddell Prioritet begtird !ran den 26 september 1958 (Storbritannien) Foreligande uppfinning avser en anordning vid vatskefiltreringsapparater och utgor ett tillagg till patentet 183 082. Inventor: R E Liddell Priority 26 September 1958 (United Kingdom). The present invention relates to a device for liquid filtration apparatus and is an appendix to the patent 183 082.

Anordningen enligt foreliggande uppfinning är avsedd for utforande av det i huvudpatentet angivna fOrfara,ndet och definieras i efterfoljande patentanspra. The device according to the present invention is intended for carrying out the method specified in the main patent and is defined in the following patent claim.

Uppfinningen forklaras narmare i det fajande med hanvisning till bifogade ritning, som upptar en sidovy av sjalva filteranordningen, delvis visad I snitt. The invention is explained in more detail in the following with reference to the accompanying drawing, which occupies a side view of the filter device itself, partly shown in section.

Filtreringsapparaten innehaller tre filterenheter 1, 2, 3, vilkas inlopp aro parallellt anslutna till en gemensam oljeinloppsledning 4. Filtereuheternas utlopp Aro parallellt anslutna till en gemensam utloppsledning 6. Filterenheterna dro Sven medelst ledningar 7, 8, 9 fOrbundna med en draneringsbehallare 10. The filtration apparatus contains three filter units 1, 2, 3, the inlets of which are connected in parallel to a common oil inlet line 4. The outlets of the filter units are connected in parallel to a common outlet line 6. The filter units are connected by lines 7, 8, 9 to a drainage tank 10.

Filterenhaterna 1, 2, 3 Aro inbordes lika och besta. av en kapa la med ett inlopp 11, som är forbundet med den gemensamma inloppsledningen 4, samt ett utlopp 12, som Sr forbundet med den gemensamma utloppsledningen 6, varjamte varje e,nhet Sr forsedd med inlopps- och utloppsavstangningsventiler 13 och 14. Filter units 1, 2, 3 Aro are boarded equally and best. of a cap 1a with an inlet 11, which is connected to the common inlet line 4, and an outlet 12, which Sr is connected to the common outlet line 6, and each unit Sr is provided with inlet and outlet shut-off valves 13 and 14.

Ett ihaligt, cylindrisk filterelement 15 Sr anordnat centralt i kapan 1, varvid elementets cylindriska vagg Sr belagen innanfor kapans vagg for att tillAta all den vatska, som skall filtreras, strommar omkring elementet och, efter att ha genomgatt delta, strommar genoin utloppet 12 till den gemensamma utloppsledningen 6. A hollow, cylindrical filter element Sr is arranged centrally in the cap 1, the cylindrical cradle of the element Sr being coated inside the cap of the cap to allow all the liquid to be filtered to flow around the element and, after passing through, the genoin outlet 12 flows to the common outlet line 6.

Ett organ D av paraboloid-, pyramid- eller liknande form Sr anordnat i varje filterelement, varvid organets fotparti star pa en plat D', som liven tjanar till att tillsluta filterelementets undre ande. Organet D har det dubbla andamalet att minska den effektiva vatskevolymen, som kan foreligga i filtret for varje tillfalle, och tjanar Sven sasom avbAjningsorgan for tillbakastrommande vatska vid utforandet av en filterrening sasom kommer att forklaras i det foljande. A member D of paraboloid, pyramid or similar shape is arranged in each filter element, the foot portion of the member standing on a plate D ', the webs of which serve to close the lower end of the filter element. The means D has the double function of reducing the effective volume of liquid which may be present in the filter for each case, and serves Sven as a deflection means for backflowing liquid in carrying out a filter purification which will be explained in the following.

Varje enhet Sr Sven forsedd med en draneringsoppning 16, till vilken Sr ansluten en draneringsledning 7, 8, 9. Dessa ledningar aro forbundna med en ledning 17, som oppnar sig i draneringsbehallarens 10 undre ande. For reglering av vitskestrommen fran filterenheterna till ledningarna 7, 8 och 9 finnas ventiler 18, 18a och 18b, vilka aro snabbt omstallbara fran helt stangt till hell oppet lage och vice versa. 136. behallaren 10 Sr anordnad en kamrnare 19 och ett ror 20 med ett antal hill 20a har anordnats for all 111151 a luft och/eller valska att stromma fran behallaren 10 till kammaren 19. En luftutloppsventil 21 Sr anordnad vid kammarens ovre ande och anordnad att styras medelst en flottor 22. Ventilen 21 Sr nor-malt oppen, varfor kammaren 19 och behallaren 10 aro fyllda med luft av atmosfarstrycket. En manometer 23 Sr monterad pa behallarens 10 lock och ett draneringsriir 24 med en ventil 25 Sr forbundet med behallarens botten. Draneringsbehallaren 10 har pd-got stOrre volym an den ofiltrerade vatska, som normalt forekommer i en filterkapa 1' pa inloppssidan om filterelementet 15. Each unit Sr Sven is provided with a drainage opening 16, to which Sr is connected a drainage line 7, 8, 9. These lines are connected to a line 17, which opens into the lower spirit of the drainage container 10. For regulating the whitening drum from the filter units to the lines 7, 8 and 9, there are valves 18, 18a and 18b, which are quickly adjustable from completely closed to fully open and vice versa. 136. the container 10 Sr arranged a chamber 19 and a tube 20 with a number of shelves 20a are arranged for all air and / or roller to flow from the container 10 to the chamber 19. An air outlet valve 21 Sr arranged at the upper end of the chamber and arranged to is controlled by a float 22. The valve 21 is normally open, so that the chamber 19 and the container 10 are filled with air by atmospheric pressure. A manometer 23 is mounted on the lid of the container 10 and a drainage tube 24 with a valve 25 is connected to the bottom of the container. The drainage container 10 has a slightly larger volume than the unfiltered liquid, which normally occurs in a filter cap 1 'on the inlet side of the filter element 15.

Smorjsystemet, till vilket filterenheterna aro anslutna, Sr sa. utfOrt, att den normala oljestrommen effektivt kan behandlas under anvandning av endast tva. av filterenheterna, medan den tredje enheten tjanar sasom reserv eller star i beredskap for anvandning, ndr de andra filterenheterna maste rengoras. The lubrication system, to which the filter units are connected, Sr said. performed, that the normal oil drum can be effectively treated using only two. of the filter units, while the third unit serves as a reserve or is on standby for use when the other filter units need to be cleaned.

Om det antages att filterenheterna 1 och 2 anvandas och filterenheten 3 star i beredskap 2— 190 77 aro enheternas 1 och 2 in- och utloppsventiler 13 och 14 oppna, medan en.hetens 3 ventiler 13 och 14 aro stangda. Draneringsventilerna 18, 18a och 18b aro stangda i och for filterenheternas avstangning fran draneringsbehallaren 10. Ventilen 25 ãr stangd medan luftningsventilen 21 ãr oppen, st att trycket I behallaren overensstammer med atmosfarstrycket. If it is assumed that the filter units 1 and 2 are used and the filter unit 3 is on standby 2— 190 77, the inlet and outlet valves 13 and 14 of the units 1 and 2 are open, while the valves 13 and 14 of the unit 3 are closed. The drain valves 18, 18a and 18b are closed in order for the filter units to shut off from the drain tank 10. The valve 25 is closed while the vent valve 21 is open, so that the pressure in the tank corresponds to the atmospheric pressure.

Norman str5mmar den olja som skall filtreras, fran den gemensamma inloppsledningen 4 till filterkapan i vardera enheten genom inloppet 11, genomgar filterelementet 15, som pa i och for sig kant satt kvarhaller smuts, slam och andra frammande amnen i (Alan, och den filtrerade oljan utstrommar sedan genom utloppen 12 till den gemensamma utloppsledningen 6. Norman flows the oil to be filtered, from the common inlet line 4 to the filter cover in each unit through the inlet 11, passes through the filter element 15, which on its own edge retained dirt, sludge and other foreign substances in (Alan, and the filtered oil). then flows out through the outlets 12 to the common outlet line 6.

Om ett filterelement skall rengoras, t. ex. filterelementet i enheten 1, tages reservenheten i bruk genom oppning av dess ventiler 13 och 14. Filtret rengores sedan pa enkelt satt genom stangning av inloppsventilen 13 och oppning av -ventilen 18. Eftersom filterenheternas utlopp arc parallellt anslutna till utloppsledningen 6, fortsatter oljan alb stromma till denna leaning fran enheterna 2, 3, som aro verksamma, och i foljd darav strommar olja med mycket hogre tryck an atmosfarstrycket genom utloppsledningen. Eftersom draneringsbehallaren 10 har atmosfarstryck uppkommer f5ljaktligen, vid oppning ay ventilen 18, som ãr en snabb5ppningsyentil, en snabb tillbakastrOmning av olja fran utloppsledningen 6 till filterenheten 1. Denna olja, som strOmmar i en dea norrnala riktningen motsatt riktning, avbojes medelst organet D, sa att den passerar utd.t genom filterelementets 15 vagg och sedan genom ledningen 7, varefter den strormnar till draneringsbehallaren 10. Den harvid uppkommande, plotsliga tillbakastromningen av oljan är tiltracklig far bortdrivning av alit smuts, slam och andra frammande amnen, som sitta fast pa elementet och for att medtaga dessa genom ledningen 7 till draneringsbehtillaren. If a filter element is to be cleaned, e.g. the filter element in the unit 1, the reserve unit is taken into use by opening its valves 13 and 14. The filter is then easily cleaned by closing the inlet valve 13 and opening the valve 18. Since the outlet of the filter units is connected in parallel to the outlet line 6, the oil continues to flow to this leaning from the units 2, 3, which are active, and as a result oil with much higher pressure flows than the atmospheric pressure through the outlet line. Consequently, since the drain tank 10 has atmospheric pressure, upon opening of the valve 18, which is a quick opening valve, a rapid return of oil from the outlet line 6 to the filter unit 1 occurs. that it passes out through the cradle of the filter element 15 and then through the line 7, after which it flows to the drainage tank 10. The resulting, sudden backflow of the oil is sufficient to drive away all dirt, sludge and other foreign substances which are stuck on the element. and to carry these through line 7 to the drainage reservoir.

Eftersom draneringsbehallarens volym är atminstone lika med volymen pa den ofiltrerade vatskan i kapan 1, kommer hela mangden ofiltrerad vatska att overforas fran kaput till draneringsbehallaren tillsammans med de frammande amnen, som losgjorts Iran filterelementet. Since the volume of the drainage tank is at least equal to the volume of the unfiltered liquid in cap 1, the whole amount of unfiltered liquid will be transferred from the hood to the drainage tank together with the foreign substances released from the filter element.

InstrOmningen av denna vatska i draneringstanken medfor, att luft drives ut genom denna genom luftutloppsventilen 21, intill dess att trycket hos luftenvatskan, som overforts genom ledningen 2p, medfor att flottoren 22 lyfter sig och stanger ventilen 21. I behallaren 10 inneslutes saledes en luftkudde, nar ventilen är stangd, och vatskans tillbakastromning fortsatter under kort lid, intill dess att denna luftkudde komprimerats till ett tryck i huvudsak motsvarande trycket i den gemensamma utloppsledningen 6, varvid vatskeaterstromningen automatiskt stop-pas utan flagon plotslig slot pa grand av att trycken utbalanserats. The inflow of this liquid into the drainage tank causes air to be expelled through it through the air outlet valve 21, until the pressure of the air liquid, which is transferred through the line 2p, causes the float 22 to rise and close the valve 21. An air cushion is thus enclosed in the container 10. when the valve is closed, and the backflow of the liquid continues for a short time, until this air cushion is compressed to a pressure substantially corresponding to the pressure in the common outlet line 6, whereby the water jet flow is automatically stopped without flaking suddenly due to the pressure being balanced.

Organet D är st utformat, att det styr den nterstrommande vatskan likformigt genom alla delar ay filterelementets vdgg, sa att filterelementets hela yta rengores effektivt utan att till draneringsbehallaren undantranges mera An den mangd ofiltrerad vatska, som finnes utanfor elementet. The means D is so designed that it guides the under-flowing liquid uniformly through all parts of the wall of the filter element, so that the entire surface of the filter element is effectively cleaned without further displacement to the drainage tank than the amount of unfiltered liquid present outside the element.

Det framgar, att volymen pa den aterstrommande vatska, som tillates stromma genom filterelementet, ãr forutbestamd, eftersom aterstromningen, oberoende av trycket i -utloppsledningen, automatiskt stoppas, sedan den forutbestamda vatskemangden instrommat i draneringsbehallaren. Detta uppnas genom anordnandet ay den automatiskt avstangbara luftutloppsventilen och under forutsattning av att drdneringsbehallaren liar den ovan omtalade forutbestamda volymen. It can be seen that the volume of the refluxing liquid allowed to flow through the filter element is predetermined, since the reflux, independent of the pressure in the outlet line, is automatically stopped after the predetermined water shortage has flowed into the drain tank. This is achieved by arranging it in the automatically shut-off air outlet valve and provided that the drainage container reads the predetermined volume mentioned above.

Vid sattet enligt huvudpatentet varierar den aterstr5mmande vdtskans volym vid utforandet av filterrening med trycket i utloppsledningen och or detta tryck ãr mycket last är en tamligen liten mangd aterstrommande vatska genom filterkapan tillracklig for att utbalansera trycken i filterkapan och draneringsbehallaren, varvid det saledes är nodvandigt att anvanda en. stor draneringsbehallare for att uppna tillracklig aterstromning for f5rflyttning av den fororenade vatskan fran filterelementets utsida. Till foljd harav tages en otillatet stor mangd filtrerad valska bort fran smorjsystemets normala cirkulation under reningar vid ordindra eller hogre an ordinara tryck och vidare forlanges den tid, som erfordras for en filterrengoring. Genom f5religgande uppfinning undvikas dessa olagenheter och draneringsbehallarens storlek minskas avsevart, eftersom den aterstrommande vatskans mangd Or i allt vasentligt lika for vane filterrening oberoende av trycket i utloppsledningen 6. In the case of the main patent, the volume of the refluxing liquid varies in the performance of filter cleaning with the pressure in the outlet line and if this pressure is very heavy, a rather small amount of refluxing liquid through the filter casing is sufficient to balance the pressures in the filter casing and drainage container. one. large drainage tank to achieve sufficient backflow to move the contaminated liquid from the outside of the filter element. As a result, an unauthorized amount of filtered roller is removed from the normal circulation of the lubrication system during cleaning at ordinary or higher than ordinary pressures and furthermore the time required for a filter cleaning is required. By means of the present invention these nuisances are avoided and the size of the drainage tank is considerably reduced, since the amount Or of the refluxing liquid is essentially the same as usual for filter cleaning regardless of the pressure in the outlet line 6.

Sasom visas pa ritningen svarar draneringsbehallarens volym fran bottnen till halen 20a I roret 201 alit vasentligt mot volymen ofiltrerad vatska, som normalt foreligger i en filterkapa pa inloppssidan Gm filterelementet, och anordningen Or sadan, att luften i r5ret 20 och kammaren 19 drives ut genom ventilen 27 i det ogonblick eller kort efter att den aterstrommande vatskan, som instrommar i behallaren, tacker dessa hal och den efterfoljande vatskeinstromningen medfor, att flottoren 22 lyftes, sa att luftutloppsventilen 21 gauges. Den fortsatta instromningen av vatska tjanar sedan till att komprimera luftkudden, som inneslutits i behallarens byre ande, mull dess att dennas tryck svarar mot trycket i utloppsledningen, varvid vatskans tillbakastrEanning automatiskt upphor. — —3 Om sa 5nskas kan luftutloppsventilen anordnias i oversidan eller i en v5.gg av drdneringsbehallaren och flottaren kan monteras sa i behallaren, att den paverkas av hojningen och sank.ningen av vd.tskenivdn i draneringsbehhllaren. As shown in the drawing, the volume of the drain tank from the bottom to the hole 20a in the tube 201 is substantially equal to the volume of unfiltered liquid normally present in a filter cap on the inlet side of the filter element, and the device is such that the air in the tube 20 and chamber 19 is expelled through the valve 27 at the moment or shortly after the re-flowing liquid flowing into the container thanks these slides and the subsequent liquid inflow causes the float 22 to be lifted so that the air outlet valve 21 is gauged. The continued inflow of liquid then serves to compress the air cushion enclosed in the cage spirit of the container until its pressure corresponds to the pressure in the outlet line, whereby the return flow of the liquid automatically ceases. - —3 If desired, the air outlet valve can be arranged in the upper side or in a wall of the drainage tank and the float can be mounted in the tank so that it is affected by the raising and lowering of the baffle level in the drainage tank.

Aven om avbOjningsorganet 15 foretr5.desTis har pyramid- eller paraboloidform kan det ha Tarje annan form, som tjanar till den tillbakastrommande vatskans avbajning genom filterenhetens vagg. Although the deflection means 15 preferably has a pyramid or paraboloid shape, it may have a different shape for Tarje, which serves to deflect the backflowing liquid through the cradle of the filter unit.

Claims

Patent claim:

Device in liquid filtration apparatus with a plurality in parallel connection to inlet and outlet conduits for liquid, separately connected filters (1, 2, 3), each consisting of a filter cover (1a) with a filter element (15) whose inflow side over a quick-opening valve (18 ) is connected to a common conduit (17), which leads to the lower part of a drainage container (10), for carrying out the set according to patent 183 082, characterized in that the drainage container (10) has a slightly larger volume than the volume of the quantity unfiltered liquid which can be accommodated in the filter on the inflow side of the filter element (15) and is provided with an air outlet valve (21), which is automatically shut-off, dd. the intended amount of backflow fluid entered the drain tank.

Device according to claim 1, characterized in that the air outlet valve: (21) is controlled by means of a float (22) arranged in the upper dude of the drainage container (10).

Device according to claim 2, characterized in that the float (22) is arranged in a special chamber (19), which air is arranged on the drainage container (10) and to which air and / or liquid can flow from the container.

4. Device according to any one of patent claims, ken 1-3, characterized in that the air outlet valve (21) is so connected to the drainage container (10) that an air cushion remains under the upper vd.gg of the container.

Device according to any one of patent claims 1-4, characterized in that the filter elements (15) have a cylinder-like shape and that a deflection means (D) is arranged in a conventional filter element in such a way that the liquid flowing back during the filter cleaning is distributed evenly over the surface of the filter element. .

Device according to claim 5, characterized in that the deflection means (D) has a pyramid or paraboloid shape. Request publications: Patent documents from Sweden 94 405; United Kingdom 555 324; Germany 140 603, 841 28 4.