NO742620L

NO742620L -

Info

Publication number: NO742620L
Application number: NO742620A
Authority: NO
Inventors: Ulf Harry Larsson; Erik Gustav Rune Johansson
Original assignee: Ulf Harry Larsson; Erik Gustav Rune Johansson
Priority date: 1973-07-18
Filing date: 1974-07-18
Publication date: 1975-02-17
Also published as: FR2237670A1; DE2433873A1; SE384324B; SE7310114L; FI215774A; AU7137774A; FR2237670B3

Description

Foreliggende oppfinnelse angår en stovfraskiller, som fortrinnsvis egner Geg for fraskillingav stov fra luft, f.eks. ved fjellboring. Stovfraskilleren omfatter en syklonenhet, der den stov-inneholdende luften bibringes en spiralformig bevegelse ved hjelp av et drivorgan, samt filterorgan og en oppsamlingsanordning for fraskilt stov. . Stovfraskillere av syklontypen.fins allerede i handelen. Selve syklonen i disse er imidlertid i regelen ikke fullt utbygget, idet den roterende luftspiralen strekker seg ned i oppsamlingsanordning en, der den hvirvler opp stov, som deretter belaster forekommende filter. Dette virker skadelig inn på fraskillingsgraden og dessuten vanskelig-gjores rensningen åv. filtrene. Disse ulemper er eliminert.ved hjelp av stovfraskilleren ifolge oppfinnelsen, der syklonenheten er. bygget ut slik at luftspiralen vender fra nedad- til oppadgående bevegelse et stykke ovenfor oppsanilingsanordningen. Man får således ingen lufthvirvel i denne, og filtrene belastes ikke unodvendigvis med stov. Ifolge oppfinnelsen strommer den i syklonenheten delvis rensede luft nedover gjennom filtrene, som derved for en stor del blir selvrensende. • Stpvfraskiileren ifolge oppfinnelsen har også andre fordeler. Ved at syklonenheten og filtrene er plassert i en sylindrisk beholder, kan dennes yttermantel fremstilles av tynnere materiale enn hvis den ne hadde vart kvadratisk ellec rektangulær i tverrsnitt, i hvilket tilfelle sideplatene måtte stottes opp for å motstå over- eller undertryjc k i f raskilleren. Ved å plassere syklonenheten i senferum av beholderen med filtrene nindt samme fås et kompakt aggregat med stort f ilter areal. Evt. forekommende 'vann' i gasstrommen påvirker ikke funksjonen hegativt.' Syklonenheten er således, utformet at den fraskiller både grovt og finkornet, materiale. Han oppnår en ok ni ng av fråskillingsgraden, da mindre partikler får en st6rre masse ved yedheftning ay vannmolekylér. Dette er'muliggjort ved den hoye hastighet som sylJonen arbeider med..Den av denne grunn okte motstand i syklonenheten kompenseres av det store filterar.eal, som gir en minimal belastning per flateenhet og derved liten motstand.i filtrene. The present invention relates to a dust separator, which is preferably suitable for separating dust from air, e.g. by rock drilling. The dust separator comprises a cyclone unit, where the dust-containing air is given a spiral movement by means of a drive, as well as a filter element and a collection device for separated dust. . Dust separators of the cyclone type are already commercially available. However, the cyclone itself in these is usually not fully developed, as the rotating air spiral extends down into a collection device, where it swirls up dust, which then loads the existing filter. This has a detrimental effect on the degree of separation and also makes cleaning difficult. the filters. These disadvantages are eliminated by means of the dust separator according to the invention, where the cyclone unit is. built out so that the air spiral faces from downward to upward movement some distance above the recovery device. You thus get no air vortex in this, and the filters are not unnecessarily loaded with dust. According to the invention, the partly purified air in the cyclone unit flows downwards through the filters, which thereby largely become self-cleaning. • The stpvfraseilator according to the invention also has other advantages. As the cyclone unit and filters are placed in a cylindrical container, its outer casing can be made of thinner material than if the had been square or rectangular in cross-section, in which case the side plates had to be supported to resist over or under pressure in the separator. By placing the cyclone unit in the center of the container with the filters at the same time, a compact unit with a large filter area is obtained. Possible 'water' in the gas cylinder does not affect the function negatively.' The cyclone unit is thus designed to separate both coarse and fine-grained material. He achieves an increase in the degree of separation, as smaller particles gain a greater mass by adhering to water molecules. This is made possible by the high speed with which the cylinder works. The resulting resistance in the cyclone unit is compensated by the large filter area, which gives a minimal load per unit area and thereby little resistance in the filters.

Det karakteristiske for stovfraskilleren ifolge oppfinnelsen angis i etterfolgende patentkrav. Én fordelaktig utforelsesform for oppfinnelsen beskrives i det f&Lgende i tilknytning til tegningene, der fig. 1 viser én stovfraskiller sett fra siden i snitt, The characteristics of the dust separator according to the invention are stated in the following patent claims. One advantageous embodiment of the invention is described below in connection with the drawings, where fig. 1 shows one dust separator seen from the side in section,

mens ,while ,

fig. 2 og 3 viser angitte tverrsnitt gjennom samme,fig. 2 and 3 show indicated cross-sections through the same,

fig. 4 viser et funksjonsriss av stovfraskilleren og fig. 5 viser deler av i stovfraskilleren inngående slange-filtre i ulike driftsfaser. fig. 4 shows a functional diagram of the dust separator and fig. 5 shows parts of the hose filters included in the dust separator in various operating phases.

Stovfraskilleren i den viste utforclse består av én syklorenhet 1,The dust separator in the study shown consists of one cyclonic unit 1,

som er anbragt i sentrum av en vertikalt plassert sylindrisk beholder 2. I denne er det dessuten rundt syklonenheten anbragt ot antall slångefiltre 3 av pdlycctorduk e.l. Ben luft som skal renses suges av et drivorgan i form cv en vifte 7 inn gjennom , et eksentrisk plassert innlop 8, hvorved den får en epiralformig bevegelse, cam i begynnelsen g£r nedover i syklonenheten 1. derved slynges en stor del av stovet i luften mot veggene i syklonenheten, der støvpartiklene bremses opp og faller, ned gjennom et fallror 9 til en oppsamlingsanordning. Ved passende dimensjonering av synlfonenheteri 1 og viften 7 vender imidlertid luftstrommen et stykke ovenfor - oppsamlingsanordning en 4 og strommer opp gjennom det sentralt plasserte utlopet 10 inn i which is placed in the center of a vertically placed cylindrical container 2. In this, there are also placed around the cyclone unit a number of hose filters 3 made of pdlycctor cloth or the like. The air to be cleaned is sucked in by a drive device in the form of a fan 7 through an eccentrically placed inlet 8, whereby it gets a spiral-shaped movement, initially going downwards in the cyclone unit 1. thereby a large part of the stove is flung into the air against the walls of the cyclone unit, where the dust particles are slowed down and fall, down through a downpipe 9 to a collection device. However, if the synphone unit 1 and the fan 7 are suitably dimensioned, the air stream turns a little above the collection device 4 and flows up through the centrally located outlet 10 into

et oppad avgrenset rora 5, der luffen påny vender og strbmmer ned gjennom de ved begge ender åpne olangefiltre 3» Ved passasjen gjennom disse renses luften ytterligere, hvoretter den strommér opp gjennom en spalte mellom beholderen 2 og. det. aygrenste rommet 5 og derpå via viften. 7 gjennom slisser i en lydisolert mantel 11 ut i: det f.ri..l>et. stov som tas'opp i filtrene faller delvis gjennom påvirkning av deft passerende luftstrommen nedad gjennom do likeledes nodtil' åpne olangefiltre 3 og havner i oppsaralingeanordningen 4»Qennc utgjores av en luftugjennomslippelig plastsekk e.l. Ibsbart festet i en an upwardly delimited tube 5, where the loofah turns again and flows down through the olang filters 3 open at both ends. During the passage through these, the air is further purified, after which it flows up through a gap between the container 2 and. the. aygrenste room 5 and then via the fan. 7 through slits in a sound-insulated mantle 11 out into: the free..l>et. dust that is taken up in the filters falls partly through the influence of deft passing the air stream downwards through the similarly open oval filters 3 and ends up in the collection device 4, which is made of an air-tight plastic bag or the like. Ibsbart fixed in one

nedtil på den sylindriske beholderen anbragt tilslutningsdol. 12. Filtraie kan renses ved en tilslutning 13 for cjokkluft. Slangefiltrenes utformning, dimensjonering og anordning medfurer a^ eie stort sett er selvrensende. Wår borkaksét bygger på inne i filtrene, oppnås-automatisk hbyerc lufthastighet. Borkaksét utsettes for aksialt trykk connection dol located at the bottom of the cylindrical container. 12. Filtraie can be cleaned by a connection 13 for shock air. The design, dimensioning and arrangement of the hose filters with furrows are mostly self-cleaning. When the drill bit is built on inside the filters, high air velocity is automatically achieved. The drill bit is subjected to axial pressure

(i filtreringsretningen) og losgjores derved fra filtrene og faller ned i tilslutningsdelen 12. Ved denne meget effektive selvrensing behover en vibrator, sjokkluft 'cl. bare anvendes sporadigk i et fåtall meget korte tilfelle. Filtimos tiltagende:tilstopping, ckningen . av lufthastigheteh og sluttelig losgjbringen av borkaksét vises i etapper i fig. 5• Innvirkning av friksjdnstapene mot syklonenhetens. vegger er kompensert ved at syklonenheten mellom utlopet og fallroret er utfort i form av en avkortet, nedad avsmalnende kjegle. (in the filtering direction) and is thereby detached from the filters and falls into the connection part 12. In this very effective self-cleaning, a vibrator, shock air 'cl. only used sporadically in a small number of very short cases. Filtimo's increasing: clogging, the ckningen. of air velocityh and finally the release of the cuttings is shown in stages in fig. 5• Impact of the friction losses against that of the cyclone unit. walls are compensated by the fact that the cyclone unit between the outlet and the rudder is extended in the form of a truncated, downwardly tapering cone.

Innenfor rammen for patentkravene kan stovfraskilleren utfores på forskjellige måter,, alt etter anvendelse og fordringer. Avhengig av det luftvolum, som skal renses, kan syklonenheton utfores med en eller, flere sykloner. Viften.kan drives med en hydraulisk, pneumatisk eller elektrisk motor og drivorganet kan alternativt utgjbrco av en hoyvakuumejektor. Et eksempel på en hoyvakuumejektor vises i fig.4, dor en ejektor 14 har erstattet viften 1- Gjennom fortrinnsvis en tre-'veiskran 15 tilfores ejektorluft, som i likhet med viften 7 sorger for undertrykksdrift ev stovfraskilleren, hvorved såkalt stbv-lekkasje effektivt forhindres. Drift méd hydraulisk motor er dpeoielt hensiktsmessig ved en del typer fjcllborvogner, der man har et hydraulisk systera, som under selve boringen har overkapasitet og da kan utnyttes for å drive©n hydraulmotor for stovfraskilleren. Tilsvarende gjelder ved brønnboring. Når stovfraskilleren skal anvendes innenfor annen industri drives viften hensiktsmessig med elektromotor, Within the scope of the patent claims, the dust separator can be designed in different ways, depending on the application and requirements. Depending on the volume of air to be cleaned, cyclone treatment can be carried out with one or more cyclones. The fan can be driven with a hydraulic, pneumatic or electric motor and the drive can alternatively be produced by a high vacuum ejector. An example of a high-vacuum ejector is shown in Fig. 4, where an ejector 14 has replaced the fan 1 - Preferably through a three-way tap 15, ejector air is supplied, which, like the fan 7, ensures negative pressure operation of the dust separator, whereby so-called stbv leakage is effectively prevented . Operation with a hydraulic motor is particularly appropriate for some types of drilling rigs, where you have a hydraulic system, which during the actual drilling has excess capacity and can then be used to drive a hydraulic motor for the dust separator. The same applies to well drilling. When the dust separator is to be used in other industries, the fan is appropriately driven with an electric motor,

I det viste eksemplet er viften plassert ovenpå den sylindrisl©beholderen. I visse tilfelle, .f. eks. i makanisk industri, kan det og3å tenkes en annen plassering. Flere maskiner kan 2<oples samtidig til innlbpet 8. In the example shown, the fan is placed on top of the cylindrical container. In certain cases, .f. e.g. in the mechanical industry, another location can also be considered. Several machines can be operated at the same time up to 8.

Claims

i. Dust separator, preferably intended for frackilling of dust from • air, e.g. in rock drilling, comprising a cyclone unit (1), where the dust-containing air is given a spiral movement by means of a drive member (7j.l4)> as well as filing members (3) and a collection device (4) for separated stiiy, k a r a k t is different in that the cyclone unit (l) is placed in the center - of a vertically placed cylindrical container (2), in which a number of vertical oval filters (3) are placed around the cyclone unit" down to open towards the collection device (4) and up to an upwardly delimited space (5), through which in the cyclone unit partially freed air from the dust is destined to pass on its way to and through the filters (3) and from there through a gap (6) between the delimited space (5) and the cylindrical container ( 2) via the drive device (7) into the open air.

2; Stbv separator according to claim 1, characterized in that the air inlet (8) of the cyclone unit (1) is eccentrically placed in its upper part and arranged to give the stbv-containing air a downward spiral movement, whereby the dust is flung towards the cyclone unit by the impact of the centrifugal force walls and falls down. through a rudder (9) located at the bottom of the cyclone unit (l) and opening into the lifting device, as the dimensions of the cyclone unit (l) and the effect of the drive member (7) are designed to cause the air flow to turn in the lower part of the unit and have an upward movement with a central outlet (10) to the upwardly branched space (5) within the eccentrically arranged inlet (8).

3. St <p> vseparator according to requirement i, k ar a k 't is is ert * v-\e-.d that the cyclone unit between the outlet (10) and fallrorct (9) has the form of a truncated, downwardly tapering cone. •

4. Stpvseparator according to claim 1, ka ra It''ib is in fact that the hose filters (3) are made of polyester cloth or the like.

5. Sfccvseparator according to claim i, characterized in that the drive means is made up of a fan (7) with hydraulic, pneumatic or electric drive motor or of a high-vacuum ejector (14)"

6. Dust separator according to requirements S> k a r a c t er. i s e x1 t in that the drive member (7) is enclosed in a sound-insulated mantle (11) placed on top of the cylindrical container (2), provided with slits, which forms a discharge for the purified air.

7. Dust separator, according to claim 1, characterized in that the collection device (4) is made of an air-tight plastic bag or the like, releasably fixed in a connection part (12) placed at the bottom of the cylindrical container (2).

8. Dust separator according to claim 1, characterized in that the hose filters (3) have such a (relatively small) internal diameter. • that even a relatively limited build-up of borkalzs cied results in a significant reduction of the free flow area and <3ery increased air speed, so that the cake layer is exposed to an axial pressure and is closed automatically.