SE201478C1

SE201478C1 -

Info

Publication number: SE201478C1
Authority: SE
Publication date: 1965-01-01

Description

Uppfinnare: J L Mansa och M Barain Prioritet begard iron den 11 november 1960 (Danmark) Foreliggande uppfinning avser en staende slamcentrifug, vars trumma har tva i forhallande till varandra f8rflyttbara delar, av vilka den ena utgores av en glidbar stangningsventil, som är farskjutbar medelst av centrifugalkraf ten paverkbar regleringsvatska pa sadant salt, att ventilen under drift oppnar eller stanger en periferislits for intermittent utslungning av franseparerat slam. Inventors: JL Mansa and M Barain Priority requested on 11 November 1960 (Denmark). The present invention relates to a standing sludge centrifuge, the drum of which has two movable parts in relation to each other, one of which is constituted by a slidable shut-off valve centrifugal force acting on control fluid on such salt that the valve during operation opens or closes a peripheral slot for intermittent ejection of frangiparred sludge.

I bittills kanda centrifugtrummor av detta slag bestar bottendelen av tva koncentriska skalar, av -vilka den minsta bildar trummans inre rum och den storre utg5r en skarm omkring den, varvid den koncentriska stangningsventilen befinner sig mellan dem. In hitherto known centrifuge drums of this kind, the bottom part consists of two concentric shells, of which the smallest forms the inner space of the drum and the larger one forms a screen around it, the concentric shut-off valve being located between them.

Det finns manga olika utformningar av denna anordning och de ha alla samma olagenheter genom aft tre koncentriska och inuti varandra anbragta och i forhallande till varandra rOrliga organ krava plats och aro tunga och minska centrifugens kapacitet. Dessutom maste en hydraulisk kolv, som glider i ett hid-rum mellan tva cylindervaggar, vara tatande mot hada vaggarna, vilket kraver en dyrbar bearbetning av minst fyra koncentriska ytor samt anordnandet av packningar eller liknande pa stangningsventilens tva. sidor. En dylik anordning ar antingen helt tat, vilket d uppnds pa bekostnad av ventilens glidbarhet och packningarnas slitstyrka, eller ocksa sipprar regleringsvatska igenom vid den ena eller den andra sidan med alla de harmed forenade olagenheterna. There are many different designs of this device and they all have the same disadvantages due to the fact that three concentric and internally arranged and in relation to each other movable bodies require space and are heavy and reduce the capacity of the centrifuge. In addition, a hydraulic piston, which slides in a space between two cylinder cradles, must be tight against the bearing cradles, which requires expensive machining of at least four concentric surfaces and the arrangement of gaskets or the like on the two shut-off valve. pages. Such a device is either completely sealed, which is achieved at the expense of the valve's slidability and the wear resistance of the gaskets, or also control fluid seeps through at one or the other side with all the associated malfunctions.

Syftet med den fareliggande uppfinningen är att astadkomma en staende slamcentrifug av detta slag, vilket icke har de ovan angivna olagenheterna. Detta uppnas enligt uppfinningen genom att ventilen utgor en koncentrisk skdrm omkring trummans bottendel och tillsammans med denna del bildar tva ringformiga rum for vatskan, vilka rums ytterdiameter är stone an diametern hos ventilens in-re stangningskant. Det är vid denna uppfinning foretradesvis lampligt men icke absolut nOdvandigt att rummen ha olika stern tryckareor i plan, vinkelrata mot centrifugens rotations axel. The object of the present invention is to provide a standing sludge centrifuge of this kind, which does not have the above-mentioned disadvantages. This is achieved according to the invention in that the valve forms a concentric shield around the bottom part of the drum and together with this part forms two annular spaces for the liquid, which outer diameter of the chamber is stone to the diameter of the inner closing edge of the valve. In this invention it is preferably appropriate but not absolutely necessary for the chambers to have different stern pressure areas in plane, perpendicular to the axis of rotation of the centrifuge.

Vid den i enlighet med uppfinningen utforda anordningen finns endast tva samverkande koncentriska ytor, vilka krava bearbetning och tatningsorgan. In the device challenged in accordance with the invention, there are only two cooperating concentric surfaces, which require processing and sealing means.

Vid en centrifug enligt uppfinningen är det vidare mojligt att tillfora regleringsvatska pa tva salt. I det ena fallet aro rummen forbundna med varandra pa sadant satt, att vatskan i viss mangd är tillforbar det mindre rummet genom ett enda stationart ror, nar trumman skall stangas och hallas stangd, och i Okad mangd, nar trumman skall oppnas och hallas oppen, varvid overskott av vatskan ledes genom en kanal till det storre rummet. I det andra fallet dro rummen icke forbundna med varandra och vatskan tillfOres vardera rum-met genom sarskilda stationara ror pa sadant satt, att vatskan tillfOres endast det mindre rummet, nar trumman skall stangas och hallas stangd, och vatskan samtidigt tillfores da rummen nar trumman skall Oppnas sakta, samt att vatskan endast tillfores det stOrre rummet, nar trumman skall oppnas snabbt. FOr att forstarka den snabba oppningsverkan kan det mindre rummet vara forsett med en 2 eller flera avloppsventiler, som oppna nàr vatsketillffirseln avbrytes och darmed paskynda detta rums totala tomning. In the case of a centrifuge according to the invention, it is furthermore possible to add regulating liquid to two salts. In one case the rooms are connected to each other in such a way that the liquid to a certain extent is supplied to the smaller room through a single stationary pipe, when the drum is to be closed and kept closed, and in Okad quantity, when the drum is to be opened and kept open, whereby excess liquid is passed through a channel to the larger space. In the second case, the rooms are not connected to each other and the liquid is supplied to each room by separate stationary pipes in such a way that the liquid is supplied only to the smaller room when the drum is to be closed and kept closed, and the liquid is supplied at the same time as the rooms when the drum is to Open slowly, and that the liquid is only supplied to the larger room when the drum is to be opened quickly. To enhance the rapid opening effect, the smaller space may be provided with a 2 or more drain valves, which open when the liquid supply is interrupted, thereby speeding up the total emptying of this room.

Uppfinningen beskrives i samband med den bifogade ritningen, vilken fortydligar tva. utforingsformer av en centrifug enligt uppfinningen. Fig. 1 visar ett axiellt snitt genom centrifugtrummans nedre del vid en forsta utforingsform. Fig. 2 visar ett motsvarande snitt genom centrifugtrummans nedre del vid en andra utforingsform. I saval fig. 1 som fig. 2 visas endast den pa ena sidan om axeln liggande delen. Fig. 3 är en detaljvy. The invention is described in connection with the accompanying drawing, which clarifies two things. embodiments of a centrifuge according to the invention. Fig. 1 shows an axial section through the lower part of the centrifuge drum in a first embodiment. Fig. 2 shows a corresponding section through the lower part of the centrifuge drum in a second embodiment. In both Fig. 1 and Fig. 2, only the part lying on one side of the shaft is shown. Fig. 3 is a detail view.

Den glidbara stangningsventilen 1 visas ph ritningen halla stangd den slits 2, som finns mellan trumoverdelen 3 och trumunderdelen 4. Det visas vidare en av de vanligtvis till ett flertal uppgaende koniska tallrikarna 5 och en av de kanaler 6, genom -vilka materialet kommer in i trummans centrifugeringsrum 7. Centrifugen bringas i rotation medelst spindeln 8. Stangningsventilens 1 och underdelens 4 med varandra i beroring kommande ytor aro utforda sa, att tvâ ringformiga rum 9, 10 bildas, av vilka rummet 9 liar mindre tryckarea an rummet 10. Regleringsvatskan sprutas fran ett stationart ror 11 in i ett koncentriskt rum 12 och ledes darifran genom radiella kanaler 13 till rummet 9, dar den ph grund av centrifugalkraften utovar ett tryck, vilket hailer stangningsventilen ii sadant lage att slitsen 2 är stangd. Genom reglering av vfitsketillforseln genom roret 11 sOrjes for att vatskeringens inre yta kommer att ligga ungefar vid den streckade linj en St i rummet 12. The sliding shut-off valve 1 is shown in the drawing keeping the slot 2, which is located between the drum part 3 and the drum lower part 4, further shown, one of the usually conical discs 5 and one of the channels 6, through which the material enters the centrifugation space of the drum 7. The centrifuge is brought into rotation by means of the spindle 8. The closing valve 1 and the lower part 4 are in contact with each other so that two annular spaces 9, 10 are formed, of which the space 9 has a smaller pressure area than the space 10. a stationary tube 11 enters a concentric chamber 12 and is passed therefrom through radial channels 13 to the chamber 9, where it exerts a pressure due to the centrifugal force, which hails the shut-off valve in such a position that the slot 2 is closed. By regulating the supply of liquid through the pipe 11, it is ensured that the inner surface of the water ring will be approximately at the dashed line a St in the space 12.

Ndr centrifugen skall tommas, okas tillforseln av regleringsvalska sa. mycket, att vatskepelarens yta flyttas mot rotationsaxeln, varefter vdtskan strommar in i en innanforliggande ursparing 14 och genom kanaler 15 le-des in i rummet 10. Aven i detta rum utovar valskan ett tryck till dess att pa grund av rummets 10 storre tryckarea stangningsventilen 1 tryekes neat trots det i rummet 9 forefintliga trycket. Slitsen 2 är nu 8ppen och det franseparerade slammet slungas ut. For att darefter stanga till slitsen 2 minskar man tillfarseln av regleringsvatska till den ursprungliga mdngden, varvid rummet 10 mister sitt innehall genom kanaler 16 och vatsketryeket i rummet 9 kommer att taga overhanden och stangningsventilen 1 lyftes till stangningslaget. When the centrifuge is to be emptied, the supply of control rollers is increased. that the surface of the water column is moved towards the axis of rotation, after which the liquid flows into an inner recess 14 and is led through channels 15 into the space 10. Also in this space the roller exerts a pressure until the closing valve 1 due to the larger pressure area of the chamber 10 neatekes neat despite the pressure present in room 9. Slot 2 is now open and the separated sludge is thrown out. In order to then close to the slot 2, the supply of control fluid is reduced to the original amount, whereby the room 10 loses its contents through channels 16 and the liquid pressure in the room 9 will take over and the shut-off valve 1 is lifted to the shut-off stroke.

I fig. 1 visas en. annan utforingsform av sanuna centrifug. Hdr dro kanalerna 15 stangda medelst proppar 15a. Genom ett rot- 11a sprutas vatska direkt in i rummet 10. Dessutom reglerar en ventil V rummets 9 valskeinnehall. Vid denna utformning av vatsketillforseln genom roret 11 utan hinder av en minsta grans for vatskeringens inre yta skall det tvartemot tillf8ras rikligt med regleringsvfitska, sa att en del av denna kontinuerligt genom kanalen V1 gar in i ventilen V och darifran ut genom en kanal V4. Ventilkroppen V2 Mlles kvar vid inloppsanden av en avloppskanal Vpa grund av trycket i ventilen V. Harigenom Mlles rummet 9 stangt och det i detta rum verkande valsketryeket hailer stongningsventilen 1 uppe. Fig. 1 shows a. another embodiment of sanuna centrifuge. Hdr pulled the channels 15 closed by means of plugs 15a. Through a root 11a, liquid is injected directly into the chamber 10. In addition, a valve V regulates the roll content of the chamber 9. In this design of the liquid supply through the pipe 11, notwithstanding a minimum boundary for the inner surface of the water ring, on the contrary, abundant control fluid must be supplied, so that a part of it continuously enters the valve V1 through the channel V1 and out through a channel V4. The valve body V2 is retained at the inlet sand of a drain channel Vpa due to the pressure in the valve V. As a result, the valve 9 is closed and the roller pressure acting in this compartment lifts the shut-off valve 1 up.

Nar centrifugtrumman skall tommas finns det tva mojligheter att utfora detta. Det ena sattet medf6r ett langsammare oppnande och sker genom att rummet -Mores vatska genom roret lla utan att dock tillforseln till rummet 9 genom roret 11 avbrytes. Det andra sattet medfor en mycket snabb oppning och sker genom att vatsketillforseln till rummet 9 genom roret 11 avbrytes samtidigt som genom roret 11a vatska tillfores rummet 10. Rummet 12 tommes mycket snabbt genom kanalerna V1, V4 tills vitskepelarens inre yta nar den streckade linjen St1 i kanalen 13. Nar ventilen V är nastan tomd, forflyttas ventilkroppen V2 utat och frilagger kanalens V5 mynning, varefter rummet 9 tommes. Vid denna anordning paskyndas verkan av trycket i rummet 10 och stangningsventilens r8relse sker, shsom redan angivits, ph ett snabbt och bestamt salt. When the centrifuge drum is to be emptied, there are two possibilities to perform this. One way results in a slower opening and takes place by the room -More being watered through the pipe 11a without, however, the supply to the room 9 through the pipe 11 being interrupted. The second set involves a very rapid opening and takes place by interrupting the liquid supply to the space 9 through the rudder 11 at the same time as liquid 10 is supplied to the chamber 10 through the liquid 11a. The chamber 12 is emptied very quickly through the channels V1, V4 until the inner surface the channel 13. When the valve V is almost empty, the valve body V2 is moved outwards and exposes the mouth of the channel V5, after which the space 9 is emptied. In this device the action of the pressure in the chamber 10 is accelerated and the movement of the shut-off valve takes place, as already stated, with a rapid and definite salt.

For att lyfta stangningsventilen 1 tillbaka till stangningsldget avbrytes valsketillforseln till rummet 10, vilket tommes genom kanaler 16. Harefter fippnas roret 11, vilket fir riktat direkt mot kanalens V1 inre mynning. Harvid fores vatskan in i ventilen V och det i denna uppkommande trycket forflyttar ventilkroppen V2 tillbaka, varvid kanalen V5 stanges. Vid okad vatsketillforsel fylles darefter rummet 9. In order to lift the shut-off valve 1 back to the shut-off valve, the supply of rollers to the space 10 is interrupted, which is emptied through channels 16. The pipe 11 is then fipped, which is directed directly towards the inner mouth of the channel V1. Then the liquid is fed into the valve V and the pressure arising from this moves the valve body V2 back, whereby the channel V5 is closed. In the event of an increased supply of liquid, the room 9 is then filled.

Vid en modifikation av den tidigare beskrivna utforingsformen av centrifugen enligt uppfinningen — se fig. 3 — utelanmas ventilen V. kanalerna V1 och V5 samt ventilkroppen V2. Endast den lilla kanalen V4 kvarstar. Pa detta salt kommer stangningsventilens 1 Oppnings- och stangningsrarelse att ske mindre snabbt an vid anvandning av ventilen V, men mera bestamt an vid en utforingsform, ddr rummet 9 alltid ãr fyllt med vfitska. In the event of a modification of the previously described embodiment of the centrifuge according to the invention - see Fig. 3 - the valve V is omitted, the channels V1 and V5 and the valve body V2. Only the small channel V4 remains. On this salt, the opening and closing movement of the closing valve 1 will take place less quickly than when using the valve V, but more specifically than in an embodiment where the space 9 is always filled with vfitska.

Claims

Patent claim:

A standing sludge centrifuge, the drum of which has two displaceable parts, one of which consists of a sliding shut-off valve, which is displaceable by means of a control fluid which can be moved by the centrifugal force such that the valve opens or closes a peripheral slot intermittent ejection of franged sludge, characterized in that the valve (1) forms a concentric screen around the bottom part (14) of the drum and together with this part forms two annular spaces (9, 10) for the liquid, which outer diameter is stone an the diameter of the inner closing edge of the valve.

Sludge centrifuge according to claim 1, characterized in that the chambers (9, 10) have different large pressure areas in plane, perpendicular to the axis of rotation of the centrifuge.

3. A sludge centrifuge according to claim 2, characterized in that the chambers (9, 10) are connected to each other in such a way that the liquid is supplied to the smaller chamber (9) in a certain amount through a single stationary tube (11), when the drum is to be closed and kept closed, and in an increased quantity, when the drum is to be opened and held open, whereby excess of the liquid is led through a channel (15) to the larger room (10).

Sludge centrifuge according to claim 2, characterized in that the chambers (9, 10) are not connected to each other and that the liquid is supplied to each chamber (9, 10) through special stationary tubes (11, 11a) in such a way that the liquid is supplied only to the the smaller room (9), when the drum is to be closed or hallos closed, and that the liquid is simultaneously supplied to the rooms, when the drum is to be opened slowly, and that the liquid is only supplied to the larger room (10), when the drum is to be opened quickly.

Sludge centrifuge according to claim 4, characterized in that the smaller space (9) is provided with one or more drain valves (V2), which are arranged to be opened when the liquid supply is interrupted, in order thereby to speed up the total emptying of this space. Request publications: Patentskrifter frein Sverige 76 977; Germany 557 08 5.