NO179760B

NO179760B - drain valve

Info

Publication number: NO179760B
Application number: NO943052A
Authority: NO
Inventors: Terje Olof Tranberg
Original assignee: Tranberg As
Priority date: 1994-08-18
Filing date: 1994-08-18
Publication date: 1996-09-02
Also published as: NO179760C; NO943052L; NO943052D0

Description

Den foreliggende oppfinnelse vedrører en dreneringsventil med filter av den art som særlig benyttes i skap, spesielt eksplosjonssikre elektriske koplingsskap, omfattende et hullegeme omsluttende et utskiftbart filter og som er fastgjør-bart til skapets bunnvegg innenfor en utsparing i bunnveggen for hullegemet. The present invention relates to a drain valve with a filter of the kind that is particularly used in cabinets, especially explosion-proof electrical switch cabinets, comprising a hollow body enclosing a replaceable filter and which can be attached to the bottom wall of the cabinet within a recess in the bottom wall for the hollow body.

Det er vanlig å anvende en mutter som fastgjøringsorgan for det filter-opptagende hullegeme som har et øvre utvendig gjenget parti for mutteren og innvendig fastholder et filter-legeme omtrent i høyde med mutteren. Vann som måtte samle seg i skapets nedre del renner inn i det filter-opptagende hullegeme i høyde med mutterens øvre flate, passerer igjennom filteret og ut igjennom en aksial, nedad åpen kanal i hullegemet. It is common to use a nut as a fastening means for the filter-receiving hole body which has an upper externally threaded part for the nut and internally holds a filter body approximately at the height of the nut. Water that has to collect in the lower part of the cabinet flows into the filter-absorbing hollow body at the height of the nut's upper surface, passes through the filter and out through an axial, downwards open channel in the hollow body.

Filtre i dreneringsanordninger av denne art arbeider under meget vanskelige forhold, hvor de er spesielt tilbøyelige for tilstopping som følge av partikler fra sandblåsing etc. som vil trenge inn i skapet, sammen med betydelig fuktighetsinn-trengning. Filtrene går derfor ofte tette, med det resultat at vann bygger seg opp inne i skapet og skaper utillatelige korrosive forhold, samtidig som store vannansamlinger kan resultere i uønskede kortslutninger. Filters in drainage devices of this kind work under very difficult conditions, where they are particularly prone to clogging as a result of particles from sandblasting etc. which will penetrate the cabinet, together with significant moisture ingress. The filters therefore often become clogged, with the result that water builds up inside the cabinet and creates unacceptable corrosive conditions, while large accumulations of water can result in unwanted short circuits.

Disse dreneringsanordninger med filtre må derfor til stadig-' het kontrolleres. I kontrolløyemed må skapene derfor åpnes for kontroll av vannstand. Dersom vannstanden står omtrent i høyde med den øvre flate av dreneringsanordningens fast-gjøringsmutter, kan dette såvel tyde på at filteret er i orden som at det er stoppet til. Kontrollarbeidene er i det hele tatt tidkrevende og omstendelige. These drainage devices with filters must therefore be constantly checked. For inspection purposes, the cabinets must therefore be opened to check the water level. If the water level is approximately at the same level as the upper surface of the drainage device's fastening nut, this may indicate that the filter is in order as well as that it is blocked. The control work is generally time-consuming and cumbersome.

Formålet med den foreliggende oppfinnelse har således vært The purpose of the present invention has thus been

å skaffe tilveie en enkel ventil for en dreneringsanordning med filter av den innledningsvis angitte art, med hvilken man lett og hurtig, med et enkelt håndgrep, kan konstatere hvorvidt filteret er tett eller ikke, uten å måtte åpne skapet eller dreneringsanordningen. to provide a simple valve for a draining device with a filter of the type indicated at the outset, with which one can easily and quickly, with a single hand, determine whether the filter is clogged or not, without having to open the cabinet or the draining device.

Dette formål er realisert ved å utforme dreneringsventilen slik at den oppviser de trekk som fremgår av etterfølgende patentkrav. This purpose is realized by designing the drainage valve so that it exhibits the features that appear in subsequent patent claims.

Ifølge oppfinnelsen omfatter dreneringsanordningen et hus som er utformet med gjennomgående hull på fortrinnsvis to eller flere ulike nivåer og som i sitt øvre parti er utformet til å omslutte et filter. I ventilhuset, som øverst er utformet med utvendige gjenger for fastgjøringsmutteren, er det anordnet et fjærbelastet ventillegeme som bærer filteret og er utformet med en langsgående dreneringskanal. Mellom ventilhusets innervegg og ventillegemets yttervegg er det dannet en langsgående kanal, eventuelt i form av et ringrom, som ved ubelas-tet ventillegeme er stengt nedadtil av mot hverandre avtettende anliggende partier på ventillegeme og ventilhus. Ved påvirkning av ventillegemet mot en trykkfjær forskyves nevnte mot hverandre avtettende anliggende partier på ventillegeme og ventilhus, slik at nevnte kanal/ringrom åpnes nedadtil, samtidig som kanalens/ringrommets øvre ende settes i forbindelse med minst ett gjennomgående hull i ventilhuset. According to the invention, the drainage device comprises a housing which is designed with through holes on preferably two or more different levels and which in its upper part is designed to enclose a filter. In the valve housing, which is designed at the top with external threads for the fixing nut, a spring-loaded valve body is arranged which carries the filter and is designed with a longitudinal drainage channel. Between the inner wall of the valve body and the outer wall of the valve body, a longitudinal channel is formed, possibly in the form of an annulus, which, when the valve body is unloaded, is closed downwards by mutually sealing parts on the valve body and valve body. Upon impact of the valve body against a pressure spring, the aforementioned mutually sealing portions of the valve body and valve housing are displaced, so that the aforementioned channel/annulus opens downwards, while at the same time the upper end of the channel/annular space is connected to at least one through hole in the valve housing.

Dersom det ved en slik påvirkning av ventillegemet skulle renne vann ned fra nevnte kanal/ringrom, er filteret tilstoppet . If, due to such an influence on the valve body, water should flow down from the said channel/annulus, the filter is clogged.

Filteret må i tilfelle skiftes ut. In this case, the filter must be replaced.

Dersom en slik påvirkning av ventillegemet ikke skulle renne vann ut igjennom nevnte kanal/ringrom, kan man med sikkerhet gå ut fra at filteret er i orden idet det har kunnet ta hånd om det vann som måtte ha samlet seg i bunnen av skapet. If such an influence on the valve body should not cause water to flow out through the aforementioned channel/annulus, it can be assumed with certainty that the filter is in order as it has been able to take care of any water that may have collected at the bottom of the cabinet.

Oppfinnelsen representerer således en sterkt forenklet måte til å kontrollere om filteret i dreneringsanordningen er tett eller ikke. The invention thus represents a greatly simplified way of checking whether the filter in the drainage device is clogged or not.

For å sikre at vann i bunnen av skapet får anledning til å komme inn i dreneringsanordningen på et lavest mulig nivå, kan nevnte fastgjøringsmutter ha nedad åpne kantutsparinger som står i forbindelse med et innvendig omkretsspor som munner ut rundt filteret, eventuelt over dette. In order to ensure that water at the bottom of the cabinet has the opportunity to enter the drainage device at the lowest possible level, said fastening nut can have downwardly open edge recesses which are in connection with an internal circumferential groove that opens around the filter, possibly above it.

Ventillegemet kan i tilslutning til en langsgående, vertikal kanal ha minst ett radialtrettet utløp ved sin nedre ende. Et slikt avvinklet kanalforløp vil effektivt for-hindre at urenheter får atkomst til det eksplosjonssikre elektriske koplihgsskap igjennom dreneringsventilen. The valve body can, in connection with a longitudinal, vertical channel, have at least one radial outlet at its lower end. Such an angled channel course will effectively prevent impurities from gaining access to the explosion-proof electrical junction box through the drainage valve.

Et eksempel på en dreneringsventil forklares nærmere i det etterfølgende under henvisning til medfølgende tegning, hvor: Fig. 1 og 2 viser en dreneringsventil ifølge oppfinnelsen i montert stand i bunnen av et skap, hvor den ene halvdel er vist i sideriss og den annen i aksialsnitt, og hvor: Fig. 1 viser dreneringsventilen i normal bruksstilling, hvor en mellom ventilhus og -legeme avgrenset kanal/ringrom er isolert, stengt ved såvel øvre som nedre nede; Fig. 2 viser dreneringsventilen ved testing av filteret, hvor nevnte kanal/ringrom ved sin øvre ende er satt i forbindelse med omgivelsene via hull i ventilhuset og er åpnet ved sin nedre ende for eventuell bortrenning av vann til-ført via ventilhusets hull. An example of a drain valve is explained in more detail below with reference to the accompanying drawing, where: Figs. 1 and 2 show a drain valve according to the invention in a mounted position in the bottom of a cabinet, where one half is shown in side view and the other in axial section , and where: Fig. 1 shows the drain valve in its normal operating position, where a channel/ring space defined between the valve housing and body is isolated, closed at both the upper and lower bottom; Fig. 2 shows the drain valve during testing of the filter, where said channel/annular space at its upper end is connected to the surroundings via holes in the valve housing and is opened at its lower end for possible drainage of water supplied via the holes in the valve housing.

På tegningen betegner henvisningstallet 10 en dreneringsventil ifølge oppfinnelsen generelt. Ifølge utførelseseksemplet er dreneringsventilen 10 montert i et nedre hjørne av et skap 12 hvis bunnvegg er angitt ved 14. I bunnveggen 14 er det boret ut et hull 16 i hvilket dreneringsventilens 10 ventilhus 18 er passet inn med en oppadrettet skulderflate 20 liggende an mot undersiden av skapets 12 bunnvegg 14, idet skul-derflaten 2 0 er utformet med et oppad åpent omkretsspor for opptagelse av en pakning i form av en O-ring 22. In the drawing, the reference number 10 denotes a drainage valve according to the invention in general. According to the design example, the drainage valve 10 is mounted in a lower corner of a cabinet 12, the bottom wall of which is indicated by 14. In the bottom wall 14, a hole 16 has been drilled into which the valve housing 18 of the drainage valve 10 is fitted with an upwardly directed shoulder surface 20 lying against the underside of the bottom wall 14 of the cabinet 12, the shoulder surface 20 being designed with an upwardly open circumferential groove for receiving a gasket in the form of an O-ring 22.

Ventilhuset 18 er ved sitt øvre endeparti utformet med et utvendig gjenget parti 18' for en fastgjøringsmutter 24. The valve housing 18 is designed at its upper end part with an externally threaded part 18' for a fastening nut 24.

For at vann i bunnen av skapet 12,14 skal kunne komme inn i dreneringsventilen 10 på lavest mulig nivå, er fastgjø-ringsmutteren 24 utformet med nedad åpne utsparinger 2 6 In order for water in the bottom of the cabinet 12,14 to be able to enter the drainage valve 10 at the lowest possible level, the fixing nut 24 is designed with downwardly open recesses 2 6

som innad munner ut i et innvendig omkretsspor 28. which inwardly opens into an internal circumferential groove 28.

Ventilhuset 18 er i sitt øvre parti forsynt med to eller flere gjennomgående hull 3 0 som fører vann som kommer fra mutter-utsparingene 2 6 og det innvendige mutter-omkretsspor 28 inn i ventilhusets 18 øvre, sentrale område hvor filteret In its upper part, the valve housing 18 is provided with two or more through holes 30 which lead water coming from the nut recesses 26 and the internal nut circumferential groove 28 into the valve housing 18's upper, central area where the filter

32 er plassert. 32 are placed.

Filteret 32 er i dette tilfelle anbragt i et sete i toppen av et ventillegeme 34, som med en skrå skulderflate 34' nor-malt ligger an mot et nedre sete 18" utformet innvendig i ventilhuset 18, fig. 2. I normal bruksstilling ligger ventillegemets 34 skrå tetningsflate 34' avtettende an mot ventilhusets 18 sete 18" under innvirkning av en trykkf jaer 3 6 som er innspent mellom ventillegemets 3 4 øvre ende og undersiden av en innadrettet flens 38 i ventilhuset 18. In this case, the filter 32 is placed in a seat at the top of a valve body 34, which with an inclined shoulder surface 34' normally rests against a lower seat 18" formed inside the valve housing 18, Fig. 2. In the normal operating position, the valve body's 34 inclined sealing surface 34' sealing against the valve housing 18 seat 18" under the influence of a pressure spring 3 6 which is clamped between the upper end of the valve body 3 4 and the underside of an inward facing flange 38 in the valve housing 18.

Ventillegemet 34 er utformet med en sentral, vertikaltrettet boring eller kanal 40 som like ovenfor ventillegemets 34 nedre ende går over i et kanalkors 42, 42' for å lede vann tilnærmelsesvis radialt ut fra dreneringsventilens nedre ende. The valve body 34 is designed with a central, vertically oriented bore or channel 40 which just above the lower end of the valve body 34 transitions into a channel cross 42, 42' to guide water approximately radially out from the lower end of the drainage valve.

Ventilhusets 18 indre hulrom er dimensjonert slik i forhold til ventillegemet 3 4 at det mellom disse strekker seg en langsgående kanal, eventuelt i form av et ringrom 44 som i dreneringsventilens normalstilling, fig. 1, er stengt både oppe og nede, det vil si at kanalen/ringrommet 44 ved sin øvre ende ligger for lavt til å kunne kommunisere med et (eller flere) av ventilhusets 18 hull 30, og ved sin nedre ende er stengt ved setet 18". The inner cavity of the valve housing 18 is dimensioned in such a way in relation to the valve body 3 4 that a longitudinal channel extends between them, possibly in the form of an annular space 44 as in the drain valve's normal position, fig. 1, is closed both above and below, that is to say that the channel/annulus 44 at its upper end is too low to be able to communicate with one (or more) of the valve housing 18 holes 30, and at its lower end is closed at the seat 18 ".

Når en slik dreneringsventil skal testes med hensyn på filterets 32 tilstand, trykkes ventillegemet 34 opp mot trykkfjærens 3 6 virkning, hvorved de relative posisjoner ifølge fig. 2 oppstår: Nå er den mellom ventilhus 18 og ventillegeme 34 beliggende kanal/ringrom 44 ved sin øvre ende bragt i væskekommunika-sjon med ventilhusets 18 gjennomgående hull 30, samtidig som ventillegemets skrå tetningsflate 34' er løftet opp fra ventilhusets sete 18", slik at nevnte kanal/ringrom er åpent også nedover. When such a drainage valve is to be tested with regard to the condition of the filter 32, the valve body 34 is pressed up against the action of the compression spring 3 6, whereby the relative positions according to fig. 2 occurs: Now the channel/annulus 44 located between the valve body 18 and the valve body 34 is at its upper end brought into fluid communication with the through hole 30 of the valve body 18, at the same time as the valve body's inclined sealing surface 34' is lifted up from the valve body's seat 18", as that said channel/annulus is also open downwards.

Med ventillegemet 34 i denne testestilling, fig. 2, vil det enten renne vann ut igjennom kanalens/ringrommets nedre ende eller det vil ikke renne vann ut derfra. I det første tilfelle kan man uten videre konstatere at filteret 32 er tett og må skiftes ut. I det annet tilfelle tilkjennegir manglende utrenning av vann at filteret har vært funksjonsdyktig. Filterutskiftning kan da utstå inntil en senere test eventuelt skulle resultere i utrenning av vann fra nevnte kanals/ringroms 44 nedre ende. With the valve body 34 in this test position, fig. 2, water will either flow out through the lower end of the channel/annulus or water will not flow out from there. In the first case, it can be readily established that the filter 32 is clogged and must be replaced. In the second case, failure to drain water indicates that the filter has been functional. Filter replacement can then be postponed until a later test should possibly result in the drainage of water from the lower end of said channel/annulus 44.

Claims

1. Device at the drain valve for installation in the bottom of cupboards which are exposed to the ingress of water and particles, which are desired to be filtered from the water and retained in a replaceable filter. arranged in the drainage valve through which the water is drained off, in particular for mounting in the bottom of explosion-proof electrical switch cabinets, comprising a valve body (18) with a seat (18") and a valve body (34) spring-loaded against the seat with a circumferential sealing surface (34 ') which cooperates sealingly with the sealing surface of the seat (18") in one position, which valve body (18) can be fitted into a hole (16) in the cabinet bottom (14) and can be secured in the installed position with a part of the valve body (18) located above the internal, upper cabinet bottom surface by means of a fastening nut (24) or similar securing device which can be screwed down from above onto said valve housing part which is provided with external threads, and where holes are formed in the valve housing, the body and possibly in said securing device (24), channel(s) and/or ports which can be brought to correspond in one valve position, characterized in that the replaceable filter (36) is placed in said valve housing part in such a way that in the drain valve's installed position in said cupboard bottom will lie below or essentially at the height of said internal, upper cupboard bottom surface, and that between the valve body (34) and valve housing (18) there is a longitudinal channel (44), possibly in the form of an annulus , whose lower end is closed by the valve body (34) when it rests tightly against the seat (18"), and whose upper end in the same position of the valve body in relation to the seat is closed by an upper circumferential part of the valve body (34) which lies tightly against the inner surface part of the valve housing (18) which delimits a continuous passage through the valve housing, and that in the valve housing (18) at a somewhat higher level than its mentioned surface part, at least one continuous, preferably radial hole (30) is designed as in the installed position of the drain valve in the bottom of the cabinet, will be at the same height as the latter, as an upward pushing force directed towards the lower end of the valve body (34) will displace the valve body in such a way in relation to the valve housing (18) that said lan The lower and upper openings of the flowing channel/annular space (44) are released, the upper opening being connected to said preferably radial hole (30), while the lower opening is opened for possible water flow through the channel and out through the drainage valve's lower outlet (42, 42' ).

2. Device as stated in claim 1, characterized in that several continuous, preferably radial holes (30) are formed in the upper part of the valve housing (18), and that the holes will be located on two or more levels when a drainage valve is installed, but where at least one hole (30) is placed in such a height position that its lowermost edge bordering the hole is essentially at the same level as said internal, upper cabinet bottom surface in the use position.

3. Device as stated in claim 1 or 2, characterized in that said fixing nut (24) or corresponding securing device is designed with downwardly open edge recesses (26) which, in the radial direction of the drainage valve inward, open into an internally designed circumferential groove (28) in the nut in the use position.