SE509047C2

SE509047C2 - Oil shut-off device for floor wells

Info

Publication number: SE509047C2
Application number: SE9600990A
Authority: SE
Inventors: Lars Spaanberg
Original assignee: Sjoebo Bruk Ab
Priority date: 1996-03-15
Filing date: 1996-03-15
Publication date: 1998-11-30
Also published as: EP0795652A3; PL183303B1; EP1233112A3; EP1233112A2; SE9600990L; PL318968A1; SE9600990D0; NO970998D0; NO970998L; EP0795652A2

Abstract

The present invention relates to an oil cut-off device for floor drains or similar. The oil cut-off device comprises a screening means (40) and a valve body (25) which are both located in a pipe member (6) of the floor drain. The screening means (40) is removably positioned in the pipe member (6) and has outwardly and downwardly directed support legs (51) which are adapted to engage lower, inwardly directed wall portions (14) of said pipe member (6) for determining the elevation of the screening means (40) in said pipe member (6). Thus, there is no need for covers as in prior art, which are designed for holding the screening means. <IMAGE>

Description

509 047 láset, kan trycka ventilkroppen i riktning nedàt till ventilsätet. 509 047 lock, can push the valve body in the direction down to the valve seat.

Oljeavstängningsanordningar av ovannämnd typ är tidigare kända från den svenska skriften SE 222 843 och uppvisar ett avskärmningsorgan som är fastskruvat pà ett lock till golvbrunnen. En sàdan konstruktion förutsätter att golvbrunnens lock är förberett eller förberedes för mon- tering av avskärmningsorganet, vilket är en nackdel.Oil shut-off devices of the above-mentioned type are previously known from the Swedish publication SE 222 843 and have a shielding member which is screwed onto a lid to the floor drain. Such a construction presupposes that the cover of the floor drain is prepared or is prepared for mounting of the screening member, which is a disadvantage.

Syftet med föreliggande uppfinning är att eliminera denna nackdel och detta àstadkomes enligt uppfinningen genom att oljeavstängningsanordningen uppvisar det kännetecken som i huvudsak framgår av patentkrav l.The object of the present invention is to eliminate this disadvantage and this is achieved according to the invention in that the oil shut-off device has the feature which essentially appears from claim 1.

Genom att avskärmningsorganet är löstagbart anordnat i rördelen via stödben behöver golvbrunnens lock inte vara försett eller förses med medel för att fästa avskärmnings- organet.Because the shielding means is releasably arranged in the pipe part via support legs, the cover of the floor drain does not have to be provided or provided with means for fastening the shielding means.

Uppfinningen skall nedan förklaras närmare med hänvisning till bifogade ritningar, pà vilka figur 1 illustrerar ett vertikalt snitt av en golvbrunn med en oljeavstängningsanordning enligt uppfinningen, var- vid en ventilkropp befinner sig i ett övre öppethàllnings- läge; figur 2 illustrerar samma snitt av golvbrunnen enligt figur 1, varvid ventilkroppen befinner sig i ett nedre stängningsläge; figur 3 illustrerar ett snitt III-III av golvbrunnen en- ligt figur 2; figur 4 illustrerar en förstorad del av snittet av golv- brunnen enligt figur 1; och 509 047 figur 5 illustrerar en annan förstorad del av snittet av golvbrunnen enligt figur 1.The invention will be explained in more detail below with reference to the accompanying drawings, in which Figure 1 illustrates a vertical section of a floor drain with an oil shut-off device according to the invention, a valve body being in an upper open holding position; Figure 2 illustrates the same section of the floor drain according to Figure 1, the valve body being in a lower closing position; Figure 3 illustrates a section III-III of the floor drain according to Figure 2; Figure 4 illustrates an enlarged portion of the section of the floor well of Figure 1; and 509,047 Figure 5 illustrates another enlarged portion of the section of the floor drain of Figure 1.

På ritningarna illustreras en golvbrunn som uppvisar en yttre del 1 med ett övre inloppsparti 2, ett under detta placerat insatsrymmande parti 3 och ett från detta ut- gående utloppsrör 4, som är anslutbart till ett avlopps- system (ej visat). Utloppsröret 4 är i detta fall sido- riktat i förhållande till det insatsrymmande partiet 3 men detsama kan alternativt vara nedàtriktat.The drawings illustrate a floor drain having an outer part 1 with an upper inlet portion 2, an insert-containing portion 3 located below it and an outlet pipe 4 extending therefrom, which is connectable to a drainage system (not shown). The outlet pipe 4 is in this case laterally directed in relation to the insert-accommodating portion 3, but the same may alternatively be downwardly directed.

I golvbrunnens insatsrymmande parti 3 är en insats 5 ut- tagbart anordnad. Denna uppvisar en rördel 6, som upptill har en utåtriktad stödfläns 7, som är avsedd att ligga på inåtriktade stödytor 8 på den yttre delen 1. Rördelen 6 uppvisar upptill också en tätningsring 9, som har kon- takt med nedåtriktade ytor 10 av den yttre delen 1 så att det uppstår tätning mellan denna och insatsen 5. Tät- ningsringen 9 kan bidra till att hålla fast insatsen 5 vid den yttre delen 1.In the insert space 3 of the floor drain, an insert 5 is removably arranged. This has a pipe part 6, which at the top has an outwardly directed support flange 7, which is intended to rest on inwardly directed support surfaces 8 on the outer part 1. The pipe part 6 also has at the top a sealing ring 9, which has contact with downwardly directed surfaces 10 of the outer part 1 so that a seal is formed between it and the insert 5. The sealing ring 9 can help to hold the insert 5 to the outer part 1.

Rördelens 6 övre delar uppvisar ett antal - lämpligen fyra - nedátriktade flänsar 11 med hål 12, vars syfte skall beskrivas senare.The upper parts of the pipe part 6 have a number - preferably four - downwardly directed flanges 11 with holes 12, the purpose of which will be described later.

Rördelen 6 har nedåtriktade väggpartier 13 som nedtill övergår i nedre, inåtriktade väggpartier 14, vilka har en centralt placerad öppning 15. Väggpartierna 14 bildar runt om öppningen 15 ett snett uppåt/inåtriktat kant- parti 16 med en mjukt rundad ändkant 17. Detta kantparti 16 är avsett att bilda ett ventilsäte 18 på rördelen 6.The pipe part 6 has downwardly directed wall portions 13 which at the bottom merge into lower, inwardly directed wall portions 14, which have a centrally located opening 15. The wall portions 14 form around the opening 15 an oblique upwardly / inwardly directed edge portion 16 with a softly rounded end edge 17. This edge portion 16 is intended to form a valve seat 18 on the pipe part 6.

Rördelen 6 uppvisar utvändiga flänspartier 19 - lämpligen fyra stycken - som sträcker sig längs de nedàtriktade och inåtriktade väggpartierna 13, 14. Flänspartierna 19 är bl.a. avsedda för centrering och avståndshållning mellan 509 047 rördelen 6 och en vätskeinnehållande del 20. Rördelen 6 är avsedd att sträcka sig nedåt i den vätskeinnehållande delen 20, som lämpligen består av ett tråg med upptill anordnade hakpartier 21 - lämpligen fyra stycken. Dessa hakpartier 21 är avsedda att medge att den vätskeinne- hållande delen 20 kan snäppas fast vid rördelens 6 nedåt- riktade flänsar 11 genom att de bringas gripa in i flän- sarnas 11 hål 12.The pipe part 6 has external flange portions 19 - suitably four pieces - which extend along the downwardly and inwardly directed wall portions 13, 14. The flange portions 19 are i.a. intended for centering and spacing between 509 047 pipe part 6 and a liquid-containing part 20. The pipe part 6 is intended to extend downwards in the liquid-containing part 20, which suitably consists of a trough with hook portions 21 arranged at the top - suitably four pieces. These hook portions 21 are intended to allow the liquid-containing part 20 to be snapped onto the downwardly directed flanges 11 of the pipe part 6 by being caused to engage in the holes 12 of the flanges 11.

Insatsen 5 fungerar så att vätska - vanligtvis vatten - rinner ned i rördelen 6 och samlas i den vätskeinnehål- lande delen 20 tills denna är full. Vätskenivån 23 befin- ner sig då väsentligt ovanför rördelens 6 nedre, inåtrik- tade väggpartier 14, d.v.s. rördelen 6 sträcker sig långt ned i den vätskeinnehållande delen 20, varigenom det bil- das ett vätskelås 22 - vanligen kallat vattenlås eller luktlås - som hindrar att odörer i avloppssystemet kan stiga upp genom golvbrunnen.The insert 5 functions so that liquid - usually water - flows down into the pipe part 6 and collects in the liquid-containing part 20 until it is full. The liquid level 23 is then substantially above the lower, inwardly directed wall portions 14 of the pipe part 6, i.e. the pipe part 6 extends far down into the liquid-containing part 20, whereby a liquid lock 22 - usually called a water trap or odor trap - is formed, which prevents odors in the drainage system from rising through the floor drain.

Om det rinner ned ytterligare vätska i rördelen 6 - efter det att den vätskeinnehållande delen 20 är full - komer vätska att ströma över dess ovankant 24, ned i den yttre delen 1 och via utloppsröret 4 till avloppssystemet.If additional liquid flows down the pipe part 6 - after the liquid-containing part 20 is full - liquid will flow over its upper edge 24, down into the outer part 1 and via the outlet pipe 4 to the drainage system.

För att hindra att olja eller oljeblandade vätskor kan rinna ut via golvbrunnen uppvisar rördelen 6 en ventil- kropp 25, som är avsedd att stänga till öppningen 15 i samverkan med ventilsätet 18. Denna ventilkropp 25 har en sådan densitet att den flyter i vätskor som har högre densitet än oljeblandad vätska eller olja och att den sjunker i vätskor som är oljeblandade eller består av olja.In order to prevent oil or oil-mixed liquids from flowing out via the floor drain, the pipe part 6 has a valve body 25, which is intended to close to the opening 15 in cooperation with the valve seat 18. This valve body 25 has such a density that it flows in liquids which have higher density than oil-mixed liquid or oil and that it sinks in liquids that are oil-mixed or consist of oil.

Exempelvis kan ventilkroppen 25 uppvisa en densitet på ca. 9,5 kg/dm3, vilket innebär att den flyter i vatten (med ungefär 1/10 ovanför ytan) men sjunker i oljeblandat vatten eller olja, exempelvis när eldningsoljor eller dieseloljor rinner ned i golvbrunnen. 509 047 När ventilkroppen 25 sjunker kommer den i kontakt med ventilsätet 18 så att densamma stänger till öppningen 15 och därmed säkerställes att den oljeblandade vätskan eller oljan inte kan rinna ut i avloppssystemet via golvbrunnen.For example, the valve body 25 may have a density of approx. 9.5 kg / dm3, which means that it floats in water (by about 1/10 above the surface) but sinks in oil-mixed water or oil, for example when heating oils or diesel oils run down into the floor drain. 509 047 When the valve body 25 sinks, it comes into contact with the valve seat 18 so that it closes to the opening 15 and thus ensures that the oil-mixed liquid or oil cannot drain into the drainage system via the floor drain.

Ventilkroppen 25 består exempelvis av en i huvudsak cy- lindrisk hålkropp 26, som nedtill tillslutes av en under- sida 27 och upptill av ett lock 28.The valve body 25 consists, for example, of a substantially cylindrical hollow body 26, which is closed at the bottom by a lower side 27 and at the top by a lid 28.

Undersidan 27 har en nedåtriktad fasthållningsdel 29, som är rörformig och som har ett utvändigt säte 30 för en tätningsring 31. Denna anligger upptill mot under- sidan 27 och den är avsedd att nedtill samverka med sätet 18 för att tillsluta öppningen 15.The underside 27 has a downwardly directed holding part 29, which is tubular and which has an outer seat 30 for a sealing ring 31. This abuts at the top against the underside 27 and is intended to co-operate with the seat 18 at the bottom to close the opening 15.

Ventilkroppens 25 inre utrymme 32 har en i riktning uppåt öppen del 33 i vilken en tyngd 34 kan föras ned uppifrån.The inner space 32 of the valve body 25 has an upwardly open part 33 in which a weight 34 can be lowered from above.

Nedre partier 35 av den uppåt öppna delen 33 befinner sig i inre delar av fasthållningsdelen 29, så att tyngden 34 kan placeras så långt ned som möjligt i ventilkroppen 25.Lower portions 35 of the upwardly open portion 33 are located in inner portions of the retaining portion 29, so that the weight 34 can be placed as far down as possible in the valve body 25.

Detta innebär att ventilkroppen 25 kan ges en mycket lågt placerad tyngdpunkt.This means that the valve body 25 can be given a very low center of gravity.

De uppåt öppna delarna 33 kan vara cylindriska och tyng- den 34 kan vara en cylindrisk kropp av metallmaterial.The upwardly open portions 33 may be cylindrical and the weight 34 may be a cylindrical body of metal material.

Den cylindriska hålkroppen 26 uppvisar upptill ett säte 36 för en tätningsring 37, vilken är avsedd att åstad- koma tätning mellan den cylindriska hàlkroppen 26 och locket 28. Detta är lämpligen fastsnäppbart vid den cy- lindriska hålkroppen 26 så att det kan tagas av vid be- hov för byte av tyngd 34. Vidare uppvisar den cylind- riska hålkroppen 26 nedtill en i sidled utåtriktad styr- fläns 38 och locket 28 bildar upptill en styrfläns 39 genom att uppvisa en i sidled utåtriktad form. 509 047 Tätningsringen 37 består företrädesvis av mjukt material, som kan forma sig till ventilsätets 18 rundade ändkant 17 och som dessutom har egenskaper att kunna anligga mot ventilsätet 18 runt om föroreningar som fastnat på detta.The cylindrical hollow body 26 has at the top a seat 36 for a sealing ring 37, which is intended to provide a seal between the cylindrical hollow body 26 and the lid 28. This is suitably fastenable to the cylindrical hollow body 26 so that it can be removed when hoof for changing weight 34. Furthermore, the cylindrical hollow body 26 at the bottom has a laterally outwardly directed guide flange 38 and the lid 28 forms at the top a guide flange 39 by having a laterally outwardly directed shape. 509 047 The sealing ring 37 preferably consists of soft material, which can form to the rounded end edge 17 of the valve seat 18 and which also has properties to be able to abut against the valve seat 18 around contaminants adhered thereto.

Denna tätningsring 37 kan bestå av oljebeständigt cell- gummimaterial.This sealing ring 37 may consist of oil-resistant cellular rubber material.

I rördelen 6 är anordnat ett avskärmningsorgan 40 som är avsett att förhindra att vätskeströmmar 41, som uppi- från strömmar ned i rördelen 6, träffar ventilkroppen 25.Arranged in the pipe part 6 is a shielding means 40 which is intended to prevent liquid flows 41, which flow from the top down into the pipe part 6, from hitting the valve body 25.

Härigenom förhindras att ventilkroppen 25, då denna fly- ter i vätska, tryckes ned till sätet 18 och därmed före- ligger inte någon risk för att ventilkroppen 25 oavsikt- ligt kan stänga till flödet genom golvbrunnen.This prevents the valve body 25, as it floats in liquid, from being pushed down to the seat 18 and thus there is no risk that the valve body 25 may inadvertently close to the flow through the floor drain.

Avskärmningsorganet 40 uppvisar företrädesvis en cylind- risk del 42, som har större diameter än ventilkroppen 25.The shielding means 40 preferably has a cylindrical part 42, which has a larger diameter than the valve body 25.

Denna cylindriska del 42 är öppen nedtill och uppvisar ett övre väggparti 43 med en företrädesvis centralt pla- cerad luftningsöppning 44, som är avsedd att medge att luft (se pil 45, figur 1) kan strömma ut ur avskärmnings- organet 40 då vätska och ventilkroppen 25 stiger upp i detta. Luftningsöppningen 44 är så anordnad att de uppi- från kommande vätskeströmmarna 41 inte kan rinna in i avskärmningsorganet 40 uppifrån i sådan omfattning att de påverkar ventilkroppen 25 i riktning nedåt mot ventil- sätet 30. För att förhindra inrinningen av vätskeströmmar 41 i avskärmningsorganet 40 kan luftningsöppningen 44 vara avskärmad uppifrån med hjälp av en huv 46. Denna uppvisar nedåtriktade fästflänsar 47 - exempelvis fyra stycken - som medger att huven 46 är fastsnäppbar på en krage 48, vilken är uppåtriktat anordnad på det övre väggpartiet 43 runt om luftningsöppningen 44.This cylindrical part 42 is open at the bottom and has an upper wall portion 43 with a preferably centrally located vent opening 44, which is intended to allow air (see arrow 45, figure 1) to flow out of the shielding means 40 when the liquid and the valve body 25 rises up in this. The vent opening 44 is arranged so that the liquid streams 41 coming from above cannot flow into the shielding means 40 from above to such an extent that they actuate the valve body 25 in the downward direction towards the valve seat 30. To prevent the inflow of liquid streams 41 into the shielding means 40, 44 be shielded from above by means of a hood 46. This has downwardly directed mounting flanges 47 - for example four - which allow the hood 46 to be snapped onto a collar 48, which is arranged upwards on the upper wall portion 43 around the vent opening 44.

Huven 46 är anordnad att bilda en sådan sidoriktad luft- spalt 49 med det övre väggpartiet 43 att luft 45 kan 509 047 ströma ut fràn luftningsöppningen 44 i en sidoriktning.The hood 46 is arranged to form such a lateral air gap 49 with the upper wall portion 43 that air 45 can flow out of the vent opening 44 in a lateral direction.

Huven 46 är vidare så anordnad att nedre delar av luft- spalten 49 ligger pà en nivà nedanför kragens 48 ovan- kant 50.The hood 46 is further arranged so that lower parts of the air gap 49 lie at a level below the upper edge 50 of the collar 48.

Avskärmningsorganet 40 är löstagbart placerat i rördelen 6 och uppvisar utàt- och nedàtriktade stödben 51 - företrä- desvis fyra stycken - som är avsedda att nedtill anligga mot rördelens 6 nedre, inàtriktade väggpartier 14, sá att de bestämmer avskärmningsorganets höjdläge i rördelen 6.The shielding member 40 is releasably located in the pipe part 6 and has outwardly and downwardly directed support legs 51 - preferably four - which are intended to abut at the bottom against the lower, inwardly directed wall portions 14 of the pipe part 6, so that they determine the height position of the shielding member in the pipe part 6.

Stödbenen 51 är dessutom företrädesvis avsedda att cent- rera avskärmningsorganet 40 i förhållande till rördelen 6.In addition, the support legs 51 are preferably intended to center the shielding member 40 relative to the pipe part 6.

Stödbenen 51 kan bilda styrpartier 52 för att styra ven- tilkroppen 25 vid dess rörelse mellan dess övre läge - i vilket den flyter i vätskan - och dess nedre läge - vid vilket den samverkar med sätet 30. Nämnda styrpar- tier 52 uppvisar företrädesvis delar 53, som är anordnade inuti avskärmningsorganet 40 och som kan vara förbundna med sáväl den cylindriska delen 42 som med det övre vägg- partiet 43.The support legs 51 can form guide portions 52 for guiding the valve body 25 in its movement between its upper position - in which it floats in the liquid - and its lower position - in which it cooperates with the seat 30. Said guide portions 52 preferably have parts 53 , which are arranged inside the shielding means 40 and which can be connected to both the cylindrical part 42 and to the upper wall portion 43.

Som framgär av figur 1 är avskärmningsorganet 40 sä ut- format och anordnat att det ovanifran täcker och upptar större delen av ventilkroppen 25 dä denna flyter i väts- kan i vätskeláset 22 så att de nedrinnande vätskeström- marna 41 rinner förbi densamma utvändigt i riktning ned mot öppningen 15, varvid vätska komer att strömma ut ur vätskelaset 22 via den vätskeinnehàllande delens 20 ovankant 24.As shown in Figure 1, the shielding means 40 is so designed and arranged that it covers and receives most of the valve body 25 from above as it floats in the liquid in the liquid lock 22 so that the descending liquid streams 41 flow past it externally in the downward direction. towards the opening 15, whereby liquid will flow out of the liquid load 22 via the upper edge 24 of the liquid-containing part 20.

Uppfinningen är inte begränsad till det ovan beskrivna och pà ritningarna illustrerade utförandet utan den kan variera inom ramen för efterföljande patentkrav. Som ej beskrivna alternativ kan nämnas att oljeavstängnings- anordningen kan användas vid andra typer av golvbrunnar 509 047 än den visade och den kan även användas vid s.k. tak- brunnar. Ventilkroppen 25 kan vara av annat utförande än det beskrivna och även avskärmningsorganet 40 kan vara av annat utförande än det visade och detsamma kan exempelvis bestà av mer än en del. Avskärmningsorganet 40 kan exempelvis vara så anordnat att övre delar därav befinner sig ovanför vätskenivàn 23 i vätskelàset 22 medan nedre delar därav befinner sig nedanför nämnda vätskenivà 23. Vidare kan avskärmningsorganet 40 vara sá anordnat att dess övre delar ligger i nivà med övre delar av rördelen 6 och det kan uppvisa en nagot större höjd än rördelens 6 halva höjd. Om det finns en luftnings- öppning 44 i avskärmningsorganet 40 kan denna lämpligen befinna sig ovanför vätskenivàn 23 i vätskelàset 22.The invention is not limited to the embodiment described above and illustrated in the drawings, but it may vary within the scope of the appended claims. As alternatives not described, it can be mentioned that the oil shut-off device can be used with other types of floor drains 509 047 than the one shown and it can also be used with so-called roof wells. The valve body 25 can be of a different design than the one described and also the shielding means 40 can be of a different design than the one shown and the same can for instance consist of more than one part. The shielding means 40 may for instance be arranged such that upper parts thereof are located above the liquid level 23 in the liquid lock 22 while lower parts thereof are below said liquid level 23. Furthermore, the shielding means 40 may be arranged such that its upper parts are level with upper parts of the pipe part 6 and it can have a slightly greater height than the half height of the pipe part 6. If there is an aeration opening 44 in the shielding means 40, this may suitably be located above the liquid level 23 in the liquid lock 22.

Claims

509 047

An oil shut-off device for floor drains or the like, wherein the floor drain has a liquid-containing part (20) and a pipe part (6), which is directed down into liquid in the liquid-containing part (20) so that a liquid lock (22) is formed. , the pipe part (6) being intended to lead liquid down to the liquid lock (22), the pipe part (6) at the bottom having an opening (15) via which liquid can flow out of the same, a valve seat (around) being arranged around the opening (15) 18) for a valve body (25) arranged in the pipe part (6), the valve body (25) being arranged to float in liquids having a higher density than oil-mixed liquid or oil but to sink in liquids which are oil-mixed or consist of oil and thereby having a lower density than the first-mentioned liquid, the valve body (25) being arranged to sink to the valve seat (18) and in cooperation with this to close the opening (15) and thereby the liquid flow through the floor well, and wherein in said pipe part (6) arranged at least one shielding means (40), which prevent liquid flows (41), which flow down into the pipe part (6) when the valve body (25) floats in the liquid in the liquid lock (22), can push the valve body (25) in the downward direction towards the valve seat (18). ), 509 047 10. characterized in that the shielding means (40) is detachably arranged in the pipe part (6) via support legs (51).

Oil shut-off device according to claim 1, characterized in that the support legs (51) are arranged on the shielding means (40).

Oil shut-off device according to claim 1 or 2, characterized in that the support legs (51) are outwards and downwards and abut at the bottom against lower inwardly directed wall portions (14) of the pipe part (6) to determine the height position of the shielding member (40) in the pipe part ( 6).

Oil shut-off device according to one of the preceding claims, characterized in that the support legs (51) are arranged to center the shielding means (40) in relation to the pipe part (6).

Oil shut-off device according to one of the preceding claims, characterized in that the support legs (51) form guide portions (52) for guiding the valve body (25) during its vertical movement between an upper position at which it floats in liquid in the liquid lock (22) and a lower position in which it cooperates with the seat (18).

Oil shut-off device according to claim 5, characterized in that the guide portions (52) have parts (53) arranged inside the shielding means (40).

Oil shut-off device according to one of the preceding claims, characterized in that the shielding means (40) has a hood (46) which shields from above at least one aeration opening (44) arranged at the top of the shielding means (40) which is intended to provide 509 047 ll. allow air (45) to flow out of it when the liquid level (23) in the liquid lock (22) and the valve body (25) rise in the shielding means (40) and that the hood (46) is arranged so that liquid streams (41) cannot flow into the shielding means (40) via the vent opening (44) to such an extent that they push the valve body (25) in the downward direction to the valve seat (18).

Oil shut-off device according to claim 7, characterized in that the hood (46) is arranged to form such a lateral air gap (49) that air (45) can flow out of the ventilation opening (44) in at least one lateral direction.

Oil shut-off device according to claim 8, characterized in that an upper wall portion (43) of the shielding member (40) has a collar (48) arranged upwards around the vent opening (44), that the hood (46) has downwardly directed mounting flanges (47) via which the same can be snapped onto the collar (48) and that the hood (46) is arranged such that lower parts of the air gap (49) lie at a level below an upper edge (50) of the collar (48).

Oil shut-off device according to any one of the preceding claims, wherein the valve body (25) at the bottom has a sealing ring (31) which is intended to be brought into contact with the valve seat (18) for closing the opening (15) in the pipe part (6), characterized in that the sealing ring (31) consists of such a soft material that it can form into such contaminants which are stuck to it and thereby abut against the valve seat (18) around these contaminants.

Oil shut-off device according to claim 10, R characterized in that the sealing ring (31) 509 047 12. consists of such a soft material that it can form a softly rounded shape on an end edge (17) of such an obliquely upwardly / inwardly directed edge portion (16) of the valve seat (18), which is formed by the pipe part (6) around the opening (15).

Oil shut-off device according to Claim 10 or 11, characterized in that the sealing ring (31) consists of oil-resistant cellular rubber material.

Oil shut-off device according to one of the preceding claims, characterized in that the valve body (25) has a lid (28) which is tightly connectable thereto and which allows the valve body (25) to be opened at the top in order to be able to place a weight (34 ) detachable in lower parts of an inner space (32) included therein, which weight (34) is intended to give the valve body (25) a predetermined weight.

Oil shut-off device according to claim 13, characterized in that the inner space (32) of the valve body (25) has an upwardly open part (33) which is designed to receive and position the weight (34) and that lower portions of the the upwardly open part (33) are located in a retaining part (29), which is directed downwards from an underside (27) of the valve body (25) and on which a sealing ring (31) included in the valve body (25) is arranged externally, whereby the valve body (25) receives a low center of gravity.

An oil shut-off device according to claim 13 or 14, characterized in that the weight is a metal body (34).

Oil shut-off device according to one of the preceding claims, characterized in that the valve body (25) has a substantially cylindrical hollow body 509 047 13. (26), which is closed at the bottom by a lower side (27) and at the top by a removable cover (28). ), that the cylindrical hollow body (26) at the bottom has a laterally outwardly directed annular guide flange (38) and that the cylindrical hollow body (26) at the top has a laterally outwardly directed guide flange (39), which is preferably formed by the lid (28) , the annular guide flanges (38, 39) being intended to co-operate with guide portions (52), which are arranged on the shielding means (40) and which are preferably formed by support legs (51) of the shielding means (40).

Oil shut-off device according to any one of the preceding claims, characterized in that the liquid-containing part (20) is arranged on the pipe part (6) and that the pipe part (6) is placed as an insert (5) in an outer part (1) of a floor drain or the like, which insert (5) in addition to the pipe part (6) has the liquid-containing part (20), the valve body (25) and the shielding means (40) and which insert (5) is removably arranged in the outer part (1).