DK172502B1

DK172502B1 - A compressed air cylinder provided with end position locking, in particular for activating smoke ventilation valves

Info

Publication number: DK172502B1
Application number: DK385289A
Authority: DK
Inventors: Otto Grasl
Original assignee: Grasl Otto Fa
Priority date: 1988-10-13
Filing date: 1989-08-07
Publication date: 1998-10-26
Also published as: DK385289D0; HU214169B; DK385289A; HUT52218A

Description

i DK PR 172502 B1in DK PR 172502 B1

Opfindelsen angår en som dobbeltslagscylinder udformet trykluftcylinder til aktivering af røgaftræksklapper i røg- og varmeaftræksanlæg ifølge krav l's indledning.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a double-stroke cylinder designed for compressed air cylinders for activating smoke exhaust valves in smoke and heat extraction systems according to the preamble of claim 1.

Sådanne trykluftcylindre anvendes i røg- og varme-5 aftræksanlæg (forkortet: RVA-anlæg) for i tilfælde af brand at åbne røg- og varmeaftræksklapper automatisk eller fjernstyret, således at opstående røg kan udledes, som ellers ville vanskeliggøre eller forhindre en redning, og således tilvejebringes der en central adgang for redningsarbejdet. End-10 videre skal der ved åbningen af varme- og røgaftræksklapperne forhindres dannelse af varmeakkumuleringer. Den anvendte trykluftcylinder skal tilfredsstille høje sikkerhedskrav.Such compressed air cylinders are used in smoke and heat extraction systems (abbreviated as RVA systems) to open smoke and heat extraction valves automatically or remotely in case of fire, so that rising smoke can be emitted which would otherwise hinder or prevent a rescue, and thus providing central access to the rescue work. Furthermore, at the opening of the heat and smoke extraction valves, formation of heat accumulations must be prevented. The compressed air cylinder used must satisfy high safety requirements.

De kendte dobbeltslagscylindre kan have endestillingsblokeringsindretninger, der især skal sikre en vidtgå-15 ende indbrudssikkerhed. Endestillingsblokeringsindretningerne kan tilvejebringe blokeringskræfter, som andrager mange gange trykluftcylinderens normale arbejdstrykkraft. Endestillingsblokeringen sker ifølge teknikkens stade ved mekanisk-selvlå-sende elementer. Ved en kendt trykluftcylinder er en ende-20 stillingsblokering tilvejebraagt, ved hvilken en kraftpåvirket stift, bolt eller kugle går i indgreb med en not. Ved dette bestandigt kraftpåvirkede blokeringselement opstår en betydelig slitage, der begrænser det tilladelige antal aktiveringer. Desuden generer en sådan blokerings forholdsvis 25 lange konstruktionslængde, der således påvirker trykluft-cylinderens totalhøjde i ugunstig retning, forårsager et forøget pladsbehov og eventuelt begrænser trykluftcylinderens svingbarhed.The known double stroke cylinders may have end position blocking devices which in particular are intended to ensure a far-reaching burglary security. The end position blocking devices can provide blocking forces which are many times the normal working pressure of the compressed air cylinder. The end position blocking is done according to the state of the art by mechanical self-locking elements. In a known compressed air cylinder, an end position lock is provided, in which a force-applied pin, bolt or ball engages a groove. This permanently impacted blocking element results in considerable wear and tear which limits the permissible number of activations. In addition, such a blockage generates a relatively long construction length, thus adversely affecting the overall height of the compressed air cylinder, causing an increased space requirement and possibly limiting the pivotability of the compressed air cylinder.

En kendt dobbeltslagscylinder af den indledningsvis 30 nævnte art kan arretere en stempelstang i en mellemliggende ud-luftningsstilling mellem en udluftnings- og røgaftræksstilling og en modstående endestilling ved låsning (DE-A- 2 906 819). Den ved en ende ud af cylinderhuset førte stempelstang har ved både sin indre ende og ved en stangdel, som 35 ligger ud for ar-bejdsstemplet, hver en låsenot. Disse samvirker med hver en løsbar låsesindretning, som begge er an- DK PR 172502 B1 2 bragt ved enden af cy-linderhuset og kan forsynes med trykgas for mekanisk at holde stempelstangen i dens Indskudte eller længst udskudte stilling. For at kunne arretere stempelstangen også i den mellemliggende udluftningsstilling, er ar-5 bejdsstemplet ved en indre ende af stempelstangen anbragt nær en låsenot, og i stempelstangdelen uden for den anden låsenot er anbragt en tredie låsenot, som kan bringes i blokerende indgreb med låsesindretningen, som er anbragt ved den af cylinderhusets ender, ud af hvilken stempelstangen forløber.A known double stroke cylinder of the kind mentioned initially can arrange a piston rod in an intermediate vent position between a vent and smoke exhaust position and an opposite end position by locking (DE-A-2 906 819). The piston rod at one end out of the cylinder housing has, at both its inner end and at a rod part 35 adjacent to the working piston, a locking note. These each cooperate with a detachable locking device, both of which are provided at the end of the cylinder housing and can be supplied with compressed gas to mechanically hold the piston rod in its inserted or longest extended position. In order to be able to arrest the piston rod also in the intermediate vent position, the working piston is positioned at an inner end of the piston rod near a locking note, and in the piston rod part outside the other locking note is provided a third locking note which can be locked into engagement with the locking device. which is arranged at the ends of the cylinder housing from which the piston rod extends.

10 Sidstnævnte låsesindretning har navnlig et dobbeltstempel med to bag hinanden beliggende trykgasdrivflader, af hvilke den indre står i forbindelse med en lavtryksgast ilslutning og den ydre med en højtryksgastilslutning. Som følge af dobbelt-stemplet har den kendte dobbeltslagscylinder en stor, indbyg-15 ningsmulighederne begrænsende konstruktionslængde. Da den tredie låsenot ved forskydning af stempelstangen må passere gennem tætninger, kan der optræde tætningsproblemer. Låseindretningen, som samvirker med den tredie låsenot, undergår yderligere slid.In particular, the latter locking device has a double piston with two successive compressed gas drive faces, the inner of which communicates with a low pressure gas connection and the outer with a high pressure gas connection. Due to the double-piston, the known double-stroke cylinder has a large, built-in possibilities limiting design length. Since the third locking note must pass through seals when displacing the piston rod, sealing problems can occur. The locking device, which cooperates with the third locking note, undergoes further wear.

20 Den foreliggende opfindelse har derfor til formål at videreudvikle en dobbeltslagscylinder af den indledningsvis angivne art således, at den er udsat for mindst mulig slitage og er kompakt og især har en ringe samlet konstruktionslængde. Tætningsproblemer skulle derved være undgået.The object of the present invention is therefore to further develop a double stroke cylinder of the type stated at the outset so that it is subject to the least possible wear and is compact and in particular has a small overall design length. Sealing problems should thus be avoided.

25 Dette formål opnås ved udformning af trykluftcy linderen med de i krav l's kendetegnende del angivne foranstaltninger.This object is achieved by designing the compressed air cylinder with the measures specified in the characterizing part of claim 1.

En som dobbeltslagscylinder udformet trykluftcylinder ifølge opfindelsen ifølge krav 1, hvormed der realiseres 30 en kort konstruktions form for cylinderen med blokering, og som udmærker sig ved høj slidbestandighed, er ejendommelig ved, at der koaksialt med stempelstangen og forskydeligt i forhold til denne hen til et anslag på stempel stangen er anbragt en ekstra blokeringsstang, som afgrænser et delslag af 35 stempelstangen og i denne delslagsstilling rager ind i en ydre, på en af blokeringsstemplerne anbragt blokeringscylinder, DK PR 172502 B1 3 hvori et ekstra blokeringsstempel er forskydeligt lejret, og som med et bøsningagtigt afsnit i delslagsstillingen omslutter kugler, der indgriber i en ringformet not i den ekstra blokeringsstang og ellers er radialt forskydelige, hvilken 5 ekstra blokeringsstang frigiver de radialt udefter forskydelige kugler, når den er bortrykket aksialt fra disse, og at det yderligere blokeringsstempel via en trykstyret skifteventil ved overskridelse af et forud fastlagt tryk står i forbindelse med det næste, ved siden af beliggende cylinder-10 rum.A double stroke cylinder designed air cylinder according to the invention according to claim 1, wherein a short block shape of the cylinder is realized and which is distinguished by high wear resistance, is characterized in that it coaxially with the piston rod and displaceable relative thereto. abutment on the piston rod is arranged an additional blocking rod which defines a sub-layer of the piston rod and in this partial position protrudes into an outer block cylinder located on one of the blocking pistons, DK PR 172502 B1 3 in which an additional blocking piston is slidably mounted, and which a sleeve-like section in the part-stroke position encloses balls which engage an annular groove in the additional locking rod and are otherwise radially displaceable, which additional locking rod releases radially outwardly displaceable balls when axially displaced therefrom, and pressure controlled changeover valve if exceeded a predetermined pressure is associated with the next, adjacent to the cylinder-10 compartment.

Den løsbare fastgørelse af stempelstangen i en delslagsstilling kan være kombineret med en ligeledes slidbestandig konstruktion for endestillingsblokeringen ifølge krav 2. Hertil benyttes ydre anslagsdæksler for blokeringsstemp-15 lerne, som er forsynet med hver en boring. Der er altså ikke udformet noget lukket anslagsdæksel. Som hidtil forløber stempelstangen gennem et af anslagsdækslerne, hvilken stempelstang i dette område er omsluttet af et af de to blokeringsstempler. Gennem det andet anslagsdæksels boring og det 20 andet, til endestillingsblokering tilvejebragte blokeringsstempel er den ekstra blokeringsstang ført, hvilken på ydersiden via et ekstra blokeringsstempel er arretérbar i delslagsstillingen. Det ekstra blokeringsstempel med de hermed samvirkende elementer, især kuglerne, som kan glide ind i en 25 not i den ekstra blokeringsstang, er opbygget efter samme princip som blokeringsstemplet til endestillingsblokering.The detachable fastening of the piston rod in a partial stroke position may be combined with an equally abrasion resistant structure for the end position locking according to claim 2. For this, outer stop covers for the locking pistons, which are provided with each bore. Thus, no closed impact cover is designed. As before, the piston rod extends through one of the stop covers, which piston rod in this area is enclosed by one of the two blocking pistons. Through the bore of the second stop cap and the second blocking piston provided for end position blocking, the additional blocking rod is passed, which on the outside via an additional blocking piston is operable in the partial position. The additional blocking piston with the cooperating elements, in particular the balls, which can slide into a groove in the additional blocking rod, is constructed according to the same principle as the stop piston for end position blocking.

Via den trykstyrede omstillingsventil forskydes automatisk det ekstra blokeringsstempel derefter til en delslagsbegrænsningen ophævende stilling, når det styrende tryk i mediet, 30 navnlig trykluft, til udskydning af stempelstangen overskrider en forudbestemt værdi. Denne trykluft tilføres ad en kort vej til det ekstra blokeringsstempel henholdsvis til det tilgrænsende blokeringstrykkammer fra det ved siden af beliggende blokeringstrykkammer af det bageste eller nederste blpke-35 ringsstempel. Blokeringscylinderen, i hvilken det ekstra blokeringsstempel er anbragt forskydeligt, befinder sig for- DK PR 172502 B1 4 trinsvis direkte ved det bageste eller nederste blokeringsstempel. Bortset fra en hertil formålstjenlig forlænget udførelsesform for det bageste blokeringsstempel kan delene i dobbeltslagscylinderens bageste og forreste ende være 5 udformet konstruktionsmæssigt identiske og således udskiftelige. Dette gælder især for udskifteligheden af cylinder-topdækslet med cylinderbunddækslet.Via the pressure controlled switch valve, the additional blocking piston is then automatically shifted to a partial stroke lifting position when the controlling pressure in the medium, in particular compressed air, for pushing the piston rod exceeds a predetermined value. This compressed air is supplied by a short path to the additional blocking piston and to the adjacent blocking pressure chamber, respectively, from the adjacent blocking pressure chamber of the rear or bottom blocking piston. The blocking cylinder, in which the additional blocking piston is slidably placed, is preferably located directly at the rear or bottom blocking piston. Apart from a suitably extended embodiment of the rear blocking piston, the parts in the rear and front ends of the double stroke cylinder may be designed to be identical in design and thus interchangeable. This is especially true for the interchangeability of the cylinder top cover with the cylinder bottom cover.

Særlig hensigtsmæssigt er ved dobbeltslagscylinderen ifølge krav 3 i en boring i stempelstangen forskydeligt 10 lejret en føringsstang, hvis ene ende har et anslag, som begrænser den indbyrdes forskydelighed mellem stempelstangen og føringsstangen, og hvis anden ende er forbundet med den ekstra blokeringsstang. I stedet for boringen i en massiv stempelstang kan stempelstangen også være udført som et rør.Particularly conveniently, in the double stroke cylinder of claim 3, in a bore in the piston rod, slidably 10 is mounted a guide rod, one end of which has a stop limiting the mutual displacement between the piston rod and the guide rod and the other end of which is connected to the additional blocking rod. Instead of drilling into a solid piston rod, the piston rod can also be designed as a pipe.

15 Ved den koncentriske forskydelighed af føringsstangen og stempelstangen i hinanden kan en meget kort konstruktions-længde for cylinderen opnås. Yderdimensionerne for trykluftcylinderen med endestillingsblokering er praktisk taget kun forøget med en værdi, der svarer til delslagsbegrænsningen 20 og -blokeringen.By the concentric displacement of the guide rod and the piston rod in each other, a very short structural length of the cylinder can be obtained. The outer dimensions of the compressed air cylinder with end position blocking are practically only increased by a value corresponding to the partial strut 20 and the blockage.

Dobbeltslagscylinderen kan være udformet både som dobbeltrørcylinder og som trykluftcylinder med kun et rør.The double stroke cylinder can be designed both as a double tube cylinder and as a compressed air cylinder with only one tube.

Ved de koncentrisk med stempelstangen - og den ekstra blokeringsstang - forskydelige låse- eller blokerings-25 stempler ifølge krav 2 kan opnås en ret kraftpåvirkningsfri blokering eller låsning af de radialt forskydelige kugler, som delvist griber ind i en afrundet not 1 stempelstangen eller i blokeringsstangen. I den blokerede stilling holdes kuglerne sikkert i noterne ved hjælp af blokeringsstemplernes 30 bøsningformede afsnit, der griber omkring kuglerne. Når derimod blokeringsstemplerne er skudt tilbage bort fra kuglerne, hvilket sker automatisk ved indledning i trykluftcylinderen af et trykmedium, ligger kuglerne frit ved en af de to noter, således at de ved en forskydning af stempelstangen eller blo-35 kerlngsstangen kan glide radialt ud af noterne. Når stempelstangen eller blokeringsstangen går ind i sin respektive DK PR 172502 B1 5 endestilling, kan kuglerne igen let føres tilbage i noten ved hjælp af det automatisk forskydelige blokeringsstempel. Til dette formål er blokeringsstemplets endeflade hensigtsmæssigt forsynet med en affasning. Forskydningen den ene vej af blo-5 keringsstemplet sker altså automatisk, når cylinderens tilstødende trykkammer får tilledt trykmedium, eftersom et blokeringstrykkammer på den ene side af blokeringsstemplet står i trykledende forbindelse med et af de to cylinderkamre. Når derimod trykket i dette cylinderkammer falder, sker der en 10 automatisk tilbageforskydning af blokeringsstemplet til dets blokerende stilling, hvortil endvidere blokeringsstemplet er kraftpåvirket, navnlig ved hjælp af en trykfjeder. Denne trykfjeder indvirker dog ikke umiddelbart på kuglerne, som går i Indgreb med stempel stangens henholdsvis blokerings-15 stangens not, men forskyder derimod kun blokeringsstemplet, som med ringe slid glider på stempelstangen henholdsvis blokeringsstangen og glider med sit bøsningsformede afsnit hen omkring kuglerne.Slidably lockable or locking pistons according to claim 2, which are concentrically displaceable with the piston rod - and the additional blocking rod - can achieve a relatively force-free blocking or locking of the radially displaceable balls which partially engage a rounded groove 1 piston rod or in the blocking rod. In the blocked position, the balls are securely held in the grooves by the bushing sections of the blocking pistons 30 which grip around the balls. On the other hand, when the pistons are pushed back away from the balls, which occurs automatically upon introduction into the compressed air cylinder of a pressure medium, the balls lie freely at one of the two grooves, so that they can slide radially out of the grooves by a displacement of the piston rod or the blocking rod. . When the piston rod or blocking rod enters its respective end position, the balls can again easily be put back into the groove by means of the automatically displaceable blocking piston. For this purpose, the end face of the blocking piston is suitably provided with a bevel. Thus, displacement one way of the blocking piston occurs automatically when the adjacent pressure chamber of the cylinder is supplied with pressure medium, since a blocking pressure chamber on one side of the blocking piston is in pressure-conductive communication with one of the two cylinder chambers. On the other hand, when the pressure in this cylinder chamber drops, an automatic back-shifting of the blocking piston occurs to its blocking position, to which, furthermore, the blocking piston is actuated, in particular by means of a compression spring. However, this compression spring does not immediately affect the balls engaging the groove of the piston rod or locking rod, but on the other hand only displaces the blocking piston which slides on the piston rod and the blocking rod, respectively, and slides with its bush-shaped section around the balls.

Blokeringselementerne er på grund af deres praktisk 20 taget kraftpåvirkningsfrie blokering og frigørelse ikke underkastet nævneværdig slitage, således at materialerne, af hvilke disse elementer fremstilles, i vidt omfang kan vælges frit. Således kan de fremstilles af metaller, eksempelvis messing, men også af formstoffer. Ved anvendelsen af særligt 25 modstandsdygtige materialer kan det tilladelige antal aktiveringer endvidere forhøjes yderligere.Due to their practically force-free blocking and release, the blocking elements are not subject to significant wear, so that the materials from which these elements are made can be freely selected freely. Thus, they can be made of metals, for example brass, but also of plastic materials. Furthermore, by the use of particularly resistant materials, the permissible number of activations can be further increased.

En yderligere, væsentlig fordel består i, at en særligt kompakt, især kort dimensionering af trykluftcylinderen er mulig uden begrænsning af dens funktionsdue-30 lighed, især på grund af anbringelsen i blokeringstrykkammeret af blokeringsstemplet koncentrisk med stempelstangen henholdsvis blokeringsstangen, hvorved blokeringsstemplets bøsningformede afsnit omslutter kuglerne.A further significant advantage is that a particularly compact, especially short dimensioning of the compressed air cylinder is possible without limiting its operability, especially because of the placement in the blocking pressure chamber of the blocking plunger concentric with the piston rod and the blocking rod, respectively, whereby the bushing plunger sections of the blocking plunger .

Det volder ingen vanskeligheder at udforme tryk-35 luftcylinderen på rationel vis med forskellige konstruktionslængder og diametre. En større udnyttelig rum- DK PR 172502 B1 6 højde står til disposition til montage og drift af trykluftcylinderen ved dens korte samlede konstruktionslængder, også ved lodret montering. Desuden opnås med kort konstruktions-længde en materialebesparelse ved fremstillingen.There is no difficulty in rationally designing the compressed air cylinder with different structural lengths and diameters. A larger utilizable space is available for mounting and operation of the compressed air cylinder at its short overall design lengths, also for vertical mounting. In addition, with a short design length, a material saving is obtained in the manufacture.

5 De radialt bevægelige kugler, der tjener til bloke ringen, er især anbragt i en kuglebøsning ifølge krav 12. På fordelagtig alternativ vis kan der imidlertid afviges fra en radial føring ved hjælp af en kuglebøsning, når kuglerne ifølge krav 4 ligger an mod hinanden i en krans i omkreds-10 retningen. I dette tilfælde kan der indsættes et større antal forholdsvis små kugler, som ikke er adskilt fra hinanden af afsnit i kuglebøsningen. Ved et sådant antal små kugler, f.eks. 10 kugler eller mere, kan der opnås en særligt højt blokeringskraft på ukompliceret måde ved jævnt fordelt an-15 bringelse af kuglerne i noten.The radially movable balls serving to block the ring are in particular disposed in a ball bushing according to claim 12. However, advantageously alternatively a radial guide can be deviated by a ball bushing when the balls according to claim 4 abut each other. a wreath in the circumferential direction. In this case, a larger number of relatively small balls may be inserted which are not separated from each other by sections in the ball bushing. In such a number of small balls, e.g. 10 bullets or more, a particularly high blocking force can be achieved in an uncomplicated manner by evenly spacing the balls into the groove.

Ved den i krav 5 angivne udformning, hvor stempelstangen på en side af stemplet overgår i blokeringsstangen, kan stempelstangen være fremstillet af et materiale, der tåler høj belastning, navnlig V2A-stål, medens der til bloke-20 ringsstangen kan vælges et lettere materiale, navnlig en aluminiumlegering .In the embodiment of claim 5, in which the piston rod on one side of the piston transitions into the blocking rod, the piston rod may be made of a high load-bearing material, in particular V2A steel, while a lighter material can be selected for the blocking rod. especially an aluminum alloy.

Det ifølge krav 7 fra trykluftcylinderen udragende afsnit af hvert af de to blokeringsstempler muliggør - forsynet med en passende profil - en manuel frigørelse af ende-25 blokeringen som nødfunktion.The portion of each of the two blocking pistons projecting from the compressed air cylinder according to claim 7 allows - provided with an appropriate profile - a manual release of the end block as an emergency function.

Ifølge krav 8 er der i blokeringsstemplet, som er forskydelig på stempelstangen, hensigtsmæssigt indrettet en ydre og en indre læbetætning, der tjener til aftætning af blokeringstrykkammeret udadtil.According to claim 8, in the blocking piston which is displaceable on the piston rod, it is conveniently arranged an outer and an inner lip seal which serves to seal the external blocking chamber.

30 Ifølge krav 9 er trykluftcylinderen hensigtsmæssigt i hver ende lukket af et anslagsdæksel, som i det mindste danner et fjederoptagelsesrum og et anslag for blokeringsstemplet koncentrisk med stempelstangen henholdsvis blokeringsstangen. Hermed fremmes trykluftcylinderens kompakte 35 konstruktion.According to claim 9, the compressed air cylinder is suitably closed at each end by a stop cap which at least forms a spring take-up space and a stop for the blocking piston concentric with the piston rod and the blocking rod respectively. This promotes the compact construction of the compressed air cylinder.

Ifølge krav 10 er det ud fra et af anslagsdækslerne DK PR 172502 B1 7 udragende afsnit af blokeringsstemplet på i og for sig kendt måde forsynet med en boring, via hvilken stempelstangen er forskydeligt lejret.According to claim 10, from one of the stop covers DK PR 172502 B1 7, a projection of the blocking piston is provided in a known manner in a manner known as a bore through which the piston rod is slidably mounted.

Ifølge krav 11 er det ud fra blokeringscylinderens 5 anslagsdæksel udragende afsnit af det yderligere blokeringsstempel lukket. I dette afsnit er hensigtsmæssigt forskydeligt lejret en støttedel, som flugter med blokeringsstangen og med en fjeder trykkes mod dennes endeflade. Med denne pladsbesparende anbragte støttedel opnås, at i det tilfælde, 10 hvor blokeringsstangen er skubbet bort fra kuglerne, at disse ikke kan falde ned i det således ellers opståede tomrum, men ligger an mod støttedelen.According to claim 11, a portion of the further blocking piston projecting from the stop cylinder 5 projecting cover is closed. In this section it is conveniently slidably mounted a support member which aligns with the locking rod and with a spring is pressed against its end surface. With this space-saving supporting part it is achieved that in the case where the blocking rod is pushed away from the balls, these cannot fall into the void thus created, but abut the support part.

Til en særlig kompakt udformning af trykluftcylinderen er ifølge krav 13 blokeringsstemplet, støttedelen 15 og anslagsdækslet med fjederoptagelsesrummet på en ende af blokeringscylinderen, anbragt koncentrisk og i det mindste delvist overlappende eller omsluttende hinanden.For a particularly compact design of the compressed air cylinder, according to claim 13, the blocking piston, the supporting part 15 and the stop cap with the spring receiving space on one end of the blocking cylinder are arranged concentrically and at least partially overlapping or enclosing one another.

Trykluftcylinderen kan ifølge krav 14 have begge de to trykmediumtilslutninger for de to cylinderkamre - og 20 dermed de tilhørende blokeringstrykkamre - beliggende 1 et plan flugtende med hinanden og under en ret vinkel med tryk-luftcylinderens hovedlængderetning enten i cylindertopdækslet eller i cylinderbunddækslet. Når endvidere Ifølge krav 14' s yderligere foranstaltninger cylindertopdækslet og cylinder-25 dækslet er indbyrdes udskiftelige, hvortil der bl.a. hører samme boringer til stempel stangen henholdsvis til blokeringsstangen, da kan alt efter udformningen af cylindertopdækslet og cylinderbunddækslet trykluftcylinderen, når den er lejret ved trykmediumtilslutningerne, være ophængt i den øverste 30 eller den nederste del af cylinderen, der er udformet som dobbeltrørcylinder.According to claim 14, the compressed air cylinder can have both of the two pressure medium connections for the two cylinder chambers - and thus the associated blocking pressure chambers - located in a plane flush with each other and at a right angle with the main air direction of the compressed air cylinder either in the cylinder top cover or in the cylinder bottom cover. Furthermore, according to the further measures of claim 14, the cylinder top cover and the cylinder 25 cover are interchangeable. If the same bores belong to the piston rod and to the blocking rod, respectively, depending on the design of the cylinder top cover and the cylinder bottom cover the compressed air cylinder, when mounted at the pressure medium connections, may be suspended in the upper 30 or the lower part of the cylinder which is designed as a double tube cylinder.

I alternativet ifølge krav 15 derimod er der kun anbragt en trykmediumtilslutning ved cylindertopdækslet og cylinderbunddækslet, som i et plan ligger over for en tilsva-35 rende blindtilslutning. Ved denne etrørscylinder er ligeledes en anbringelse af ophængningen mulig i trykluftcylinderens 8 OK PR 172502 B1 øverste eller nederste del.In the alternative according to claim 15, on the other hand, only one pressure medium connection is arranged at the cylinder top cover and the cylinder bottom cover, which in one plane is opposite a corresponding blank connection. In this one-tube cylinder, a suspension of the suspension is also possible in the upper or lower part of the compressed air cylinder 8 OK PR 172502 B1.

Særligt hensigtsmæssige materialer, der muliggør en let, men pålidelig konstruktion af trykluftcylinderens enkelte elementer, er angivet i krav 16 og 17.Particularly suitable materials enabling a light but reliable construction of the individual elements of the compressed air cylinder are set out in claims 16 and 17.

5 Ved udformningen ifølge krav 18 af skifteventilen, som aktiverer det ekstra blokeringsstempel ifølge krav 18, tilvejebringes, når der ikke hersker noget forhøjet tryk til frigivelse af det ekstra blokeringsstempel, en udluftning for det ekstra blokeringsstempel eller det ved siden af belig-10 gende blokeringstrykkammer til omgivelserne, hvilket tjener som lækagesikring til hindring af en utilsigtet forskydning af det ekstra blokeringsstempel med arreteringsfrigivelse til følge.In the design according to claim 18 of the switch valve which activates the additional blocking piston according to claim 18, when there is no elevated pressure for releasing the extra blocking piston, a vent for the extra blocking piston or the adjacent blocking pressure chamber is provided. to the surroundings, which serves as a leakage protection to prevent an unintended displacement of the extra blocking piston resulting in arresting release.

Ifølge krav 19 hører der til skifteventilen en f je-15 derbelastet skålmanchet, som, når et forudindstillet tryk er nået, kan tilvejebringe en forbindelse mellem en trykmedium-tilførsel og et ventilkammer, hvori radiale boringer udmunder. Ved ændring af fjederbelastningen, især ved indstilling af en forspænding, kan lufttrykkets grænseværdi bestemmes, 20 fra hvilken værdi trykmediumtilførsien tilsluttes ventilkammeret og bevirker, at dobbeltslagscylinderen føres til den helt yderste endestilling - alarmstillingen.According to claim 19, the shift valve includes a spring-loaded cup sleeve which, when a preset pressure is reached, can provide a connection between a pressure medium supply and a valve chamber in which radial bores open. By changing the spring load, especially when setting a bias voltage, the limit value of the air pressure can be determined, from which value the pressure medium supply is connected to the valve chamber and causes the double stroke cylinder to go to the very extreme end position - the alarm position.

Hertil er skifteventilens ventilboring ifølge krav 20 fortrinsvis trykmediumledende forbundet med det næste, ved 25 siden af beliggende cylinderkammer, og de radiale boringer fører til et blokeringstrykkammer i den ydre blokeringscylinder.For this purpose, the valve valve valve bore according to claim 20 is preferably pressurized medium conductively connected to the next, adjacent 25, adjacent cylinder chamber, and the radial bores lead to a blocking pressure chamber in the outer blocking cylinder.

Den trykstyrede skifteventil kan indsættes let og på rationel måde som nødventil, hvormed de via trykmedium 30 aktiverede elementer, især i det mindste en etslagscylinder, først aktiveres i en tryklu f tcylinder indretning når et forud fastsat mindstetryk overskrides. Nødventilen er hertil indsat i trykmediumledningen til etslagscylinderen. Nødventilen omfatter en trykstyret skifteventil og i den her foreliggende 35 udførelsesform hensigtsmæssigt en 1 anlæg mod nødventilen værende og dertil fastgjort tilslutningsplade, hvortil den via DK PR 172502 B1 9 nødventilen afbrudte trykmediumledning kan sluttes. Tilslutningsboringerne står via forbindelsesboringer direkte i forbindelse med skifteventilens radiale boringer. Den samme ventilkonstruktionsmåde kan altså anvendes til to forskellige 5 formål, alt efter om den skal forbindes med trykluftcylinde-ren eller med en trykluftcylinderindretning.The pressure controlled switch valve can be inserted easily and in a rational manner as an emergency valve, whereby the elements activated via pressure medium 30, especially at least one single cylinder, are first activated in a pressurized cylinder device when a predetermined minimum pressure is exceeded. For this, the emergency valve is inserted into the pressure medium line for the one-stroke cylinder. The emergency valve comprises a pressure controlled shift valve and, in the present embodiment, conveniently a 1 plate against the emergency valve and a connection plate attached thereto to which the pressure medium line interrupted by DK PR 172502 B1 9 can be connected. The connection bores are connected directly to the radial bores of the shift valve via connection bores. The same valve construction method can thus be used for two different purposes, depending on whether it is to be connected to the compressed air cylinder or to a compressed air cylinder device.

Opfindelsen vil i det følgende blive nærmere forklaret under henvisning til tegningen, hvor fig. 1 en første udførelsesform for trykluftcylinderen, der 10 her er udformet som dobbeltslagscylinder og dobbelt-rørcylinder, hvor den nederste del viser stempelstangens indskudte stilling og den øverste del stempelstangens udskudte stilling, fig. 2 den første udførelsesform i en delslagsstilling, hvor 15 cylindertopdækslet og cylinderbunddækslet er ombyttet i forhold til fig. 1, fig. 3 en anden udførelsesform for trykluftcylinderen, der her er udformet som trestillings- eller dobbeltslagscylinder og som etrørscylinder, hvor den nederste del og den øverste 20 del i fig. 3 er analoge til stempelstangens to endestillinger i fig. 12, fig. 4 den anden udførelsesform i en delslagsstilling, fig. 5 en nødventil bestående af en trykstyret skifte-ventil og en tilslutningsplade i et snit langs A-A i fig. 6, 25 fig. 6 nødventilen ifølge fig. 5 med et snit gennem tilslutningspladen langs B-B i fig. 5, og fig. 7 indsætningen af en nødventil i et skematisk vist udførelseseksempel for en trykluftcylinderindretning med en tostillings- eller etslagscylinder og en trestillings- eller 30 dobbeltslagscylinder.The invention will be explained in more detail below with reference to the drawing, in which: FIG. 1 shows a first embodiment of the compressed-air cylinder, which here is configured as a double-stroke cylinder and a double-pipe cylinder, the lower part showing the inserted position of the piston rod and the upper part of the piston rod's extended position; 2 shows the first embodiment in a partial position where the cylinder top cover and the cylinder bottom cover are exchanged with respect to FIG. 1, FIG. 3 shows another embodiment of the compressed air cylinder, which is configured here as a three-position or double-stroke cylinder and as a one-tube cylinder, the lower part and the upper part of FIG. 3 are analogous to the two end positions of the piston rod in FIG. 12, FIG. 4 shows the second embodiment in a partial position; FIG. 5 shows an emergency valve consisting of a pressure controlled switch valve and a connecting plate in a section along A-A in FIG. 6, 25 FIG. 6 shows the emergency valve of FIG. 5 with a section through the connection plate along B-B in FIG. 5, and FIG. 7 shows the insertion of an emergency valve in a schematically illustrated embodiment of a compressed air cylinder device with a two-position or one-stroke cylinder and a three-position or double-stroke cylinder.

Ifølge fig. 1 og 2 er udformet kun et cylindertop-dæksel 41 med indbyrdes flugtende, i et plan beliggende bundhuller 61, 62, af hvilke hvert valgfrit tjener til tryklufttilførsel, og begge tilsammen kan anvendes til stationær 35 eller svingbar ophængning af trykluftcylinderen. Herudover er cylindertopdækselet 41 og et cylinderbunddæksel 42 indbyr- DK PR 172502 B1 10 des udskiftelige, således at ophængningen valgfrit kan ske ved trykluftcylinderens øverste ende eller ved dennes neder-ste ende, alt efter hvor cylindertopdækselet 41 er påsat.According to FIG. 1 and 2, only a cylinder top cover 41 is provided with mutually flush, bottom holes 61, 62, each of which optionally serves for compressed air supply, and both of which together can be used for stationary 35 or pivotal suspension of the compressed air cylinder. In addition, the cylinder top cover 41 and a cylinder bottom cover 42 are interchangeable, so that the suspension can optionally occur at the upper end of the compressed air cylinder or at the lower end thereof, depending on where the cylinder top cover 41 is mounted.

Det skal bemærkes, at tryklufttilførslen fra bund-5 hullet 61 til et første cylinderrum 63 sker via en kanal 64 og et ikke vist spillerum ved en stempelstang 51. Tryklufttilførslen til blokeringstrykkammeret 45 sker ligeledes via stempel stangens 51 spillerum. Den trykluft ledende forbindelse mellem bundhullet 62 og et blokeringstrykkammer 92 ved den 10 højre eller nederste ende af trykluftcylinderen sker via kanaler 47, 48 samt et mellemrum mellem et cylinderrør 49 og et beskyttelsesrør 50, som forbinder cylindertopdækselet med cylinderbunddækslet. Et andet cylinderrum 65 forsynes også med trykluft via en blokeringsstangs 70 spillerum. Et stempel 15 53 bliver altså alt efter, hvilket af bundhullerne 61, 62, der forsynes med trykluft, forskudt fremefter henholdsvis opefter eller bagud henholdsvis nedefter under samtidig frigørelse af endeblokeringen ved et bageste blokeringsstempel 75 eller ved et forreste blokeringsstempel 43.It should be noted that the compressed air supply from the bottom hole 61 to a first cylinder compartment 63 takes place via a duct 64 and an unspecified clearance at a piston rod 51. The compressed air supply to the blocking pressure chamber 45 also takes place via the clearance space of the piston rod 51. The compressed air conductive connection between the bottom hole 62 and a blocking pressure chamber 92 at the right or lower end of the compressed air cylinder takes place via ducts 47, 48 and a gap between a cylinder tube 49 and a protective tube 50 which connects the cylinder top cover to the cylinder bottom cover. A second cylinder compartment 65 is also provided with compressed air via the clearance space of a blocking rod 70. Accordingly, a piston 15 53 is displaced forwardly of the bottom holes 61, 62 provided with compressed air, respectively upwards or backwards and downwards, respectively, while simultaneously releasing the end block at a rear blocking piston 75 or at a front blocking piston 43.

20 Ved de efterfølgende dobbeltslagcylindre kan stem pelstangen forskydes en forholdsvis stor slaglængde og blokeres i sine endestillinger, foruden en defineret mindre slaglængde, hvori stempelstangen holdes af det herskende tryk.In the subsequent double stroke cylinders, the piston rod can be displaced a relatively large stroke and blocked in its end positions, in addition to a defined smaller stroke in which the piston rod is held by the prevailing pressure.

Cylinderrøret 49 og beskyttelsesrøret 50 danner i 25 udførelsesformen for dobbeltslagcylinderen ifølge fig. 12 og 13 1 forbindelse med cylindertopdækselet 41 og cylinderbund-dækslet 42 så lange cylinderkamre 63, 65, at stemplet 53 kan indstilles den maksimale slaglængde, især til aktivering af røga f t ræk sk1apper.The cylinder tube 49 and the protective tube 50 form in the embodiment of the double stroke cylinder according to FIG. 12 and 13 in connection with the cylinder top cover 41 and the cylinder bottom cover 42, the cylinder chambers 63, 65 are so long that the piston 53 can be adjusted to the maximum stroke length, especially for activating the smoke inlet rails.

30 I den øverste del af fig. 1 over en hovedlængdeakse 67 er stemplet 53 vist i en venstre eller øverste stilling, hvori stempelstangen 51 er helt udskudt eller udtrukket. I den nederste del af fig. 1 under hovedlængdeaksen 67 befinder derimod stemplet 53 sig i sin højre eller nederste endestill-35 ing, der svarer til stempelstangens 51 indskudte stilling.30 In the upper part of FIG. 1 over a main longitudinal axis 67, the plunger 53 is shown in a left or upper position in which the plunger rod 51 is fully extended or extended. In the lower part of FIG. 1, below the main longitudinal axis 67, on the other hand, the piston 53 is in its right or lower end position, corresponding to the inserted position of the piston rod 51.

I fig. 2 indtager stemplet 53 en mellemstilling svarende til DK PR 172502 B1 11 en delslaglængde for stempelstangen 51.In FIG. 2, the piston 53 occupies an intermediate position corresponding to DK PR 172502 B1 11 a partial stroke length of the piston rod 51.

Ved en udførelsesform for dobbeltslagcylinderen Ifølge fig. 1 og 2 er der Inden 1 en boring 68, se fig. 2, 1 stempelstangen samt Inden 1 en boring 69 Inden 1 den med 5 stempelstangen 1 stemplets område sammenskruede blokeringsstang 70 er koaksialt forskydeligt lejret en føringsstang 71.In one embodiment of the double stroke cylinder According to FIG. 1 and 2 there is Before 1 a bore 68, see FIG. 2, 1 piston rod and Before 1 a bore 69 Before 1, the locking rod 70 screwed together with the 5 piston rod 1 is coaxially displaceable a guide rod 71.

Ved den i boringen 68 værende ende af føringsstangen er denne forsynet med et ligeledes glidningsforskydeligt anslag 72, se fig. 2, som kan ligge an mod en reduceret endeflade 73 af 10 blokeringsstangen 70 og dér danne et anslag. Ved den modsatte ende er der på føringsstangen 71 påskruet en ekstra blokeringsstang 74 af større tværmål, som kan blokeres til delslagsbegrænsningen .At the end of the guide rod at the bore 68, it is also provided with a slidable slide 72, see FIG. 2, which may abut a reduced end surface 73 of the blocking bar 70 and form a stop there. At the opposite end, on the guide rod 71 is screwed an additional blocking rod 74 of larger transverse dimensions, which can be blocked to the partial stroke restriction.

For at den ekstra blokeringsstang 74 kan blokeres 15 uden for et bageste stempel 75, er blokeringsstemplet 75 forsynet med en udadtil åben ansats 76, på hvilken en ydre blokeringscylinder 77 er anbragt. I blokeringscylinderen 77 er et ekstra blokeringsstempel 78 forskydeligt lejret, hvilket stempel hviler mod en kun antydet fjeder 79 på et an-20 slagsdæksel 80. Delene 77-80 tjener i forbindelse med de elementer, der herefter skal omtales, til slaglængdebe-grænsning, d.v.s. til arretering af stempelstangen ved en delslaglængde. Herudover har i detaljer det ekstra blokeringsstempel 78 et bøsningformet afsnit 81, der under kug-25 lerne 82 i en ringformet not 83 kan arreteres 1 Indgreb med den ekstra blokeringsstang 74. Der ligger således et sæt af 1 notens 83 omkreds i kreds og i anlæg mod hinanden anbragte små kugler i noten.In order for the additional blocking rod 74 to be blocked 15 outside a rear piston 75, the blocking piston 75 is provided with an outwardly open shoulder 76 on which an outer blocking cylinder 77 is arranged. In the blocking cylinder 77, an additional blocking piston 78 is slidably mounted, which piston rests against a only indicated spring 79 on a abutment cover 80. Parts 77-80 serve, in connection with the elements to be referred to, for stroke length restriction, i.e.. for arresting the piston rod at a partial stroke length. In addition, in detail, the auxiliary locking piston 78 has a sleeve-shaped section 81 which can be arranged under the balls 82 in an annular groove 83 1 Engagement with the auxiliary locking bar 74. Thus, a set of 1 of the groove 83 is circumferentially circled placed against each other small balls in the groove.

På lignende måde lejres sæt af mindre kugler 84 og 30 85 uden kuglebøsning i den bøsningformede afsnits 86 og 87 områder, således at disse kan skubbes ind 1 ringformede noter 88, 89 i blokeringsstangen 70 henholdsvis stempelstangen 89.Similarly, sets of smaller balls 84 and 30 85 are pitched without ball bushing in the bushing section 86 and 87 regions so that they can be pushed into annular grooves 88, 89 in the blocking rod 70 and the piston rod 89, respectively.

For at kuglerne 82 henholdsvis 84 ved tilbagetrukket ekstra blokeringsstang 74 henholdsvis blokeringsstang 70 ikke ukon-35 trolleret kan falde ind i de derved fritlagte hulrum, er der tilvejebragt fjederbelastede, forskydelige støttedele 90, 91, DK PR 172502 B1 12 som 1 disse tilfælde bærer kuglerne.In order that the balls 82 and 84, respectively, at retracted auxiliary blocking rod 74 or blocking rod 70 cannot uncontrollably fall into the cavities thus released, spring-loaded, displaceable support members 90, 91, DK 1, 172502 B1 12 are provided which in these cases carry the balls .

Forbindelsen mellem bundhullet 62 og et bloke-ringstrykkammer 92 samt det andet cylinderrum 65 er til dels beskrevet ovenfor. Endvidere er der en forbindelse mellem 5 blokeringstrykkammeret 92 og et blokeringstrykkammer 93 via en kanal 94 i ansatsen 76. Kanalen 94 fører til en skifte· ventil 95, der har en skålformet pakning 96, som på sin ene side er udsat for det indstillelige tryk fra et fjederbøsning 97 og kan hvile mod et ventilsæde 114. Til trykindstilling 10 tjener en fjeder 98 og en gevindtap 99 i en møtrik 100. Gevindtappen kan låses via en anden møtrik.The connection between the bottom hole 62 and a blocking pressure chamber 92 as well as the second cylinder space 65 is partly described above. Further, there is a connection between the blocking pressure chamber 92 and a blocking pressure chamber 93 via a duct 94 in the shoulder 76. The duct 94 leads to a switch · valve 95 having a cup-shaped gasket 96 which, on one side, is subjected to the adjustable pressure from a spring bush 97 and may rest against a valve seat 114. For pressure setting 10, a spring 98 and a threaded pin 99 serve in a nut 100. The threaded pin can be locked via another nut.

Ved indstillingen af fjederens 98 forspænding bestemmes, ved hvilket tryk i bundhullet 62 s tempel s tangen skal skubbes til den helt udtrukne stilling, efter at blokeringen 15 ved den ekstra blokeringsstang 74 er ophævet. Hertil frit-læ-ger fjederbøsningen 97 et ventilrum 102, hvori det deri via kanalen 94, en radial boring 103a og en ventilboring 103 opbyggede tryk trykker den skålformede pakning 96 tilbage modsat fjederkraften. Trykluften kan på grund heraf, strømme 20 gennem radiale boringer 104, 105 og nå blokeringstrykkammeret 93 og således tilbageskyde det ekstra blokeringsstempel 78 mod højre henholdsvis nedefter, således at dets bøsningformede afsnit 81 frigiver kuglerne, som kan trykkes ud af noten 83, når stemplet 53 som følge af trykket i cylinderkammeret 25 65 er skubbet helt mod venstre henholdsvis opad i den fuldt udtrukne stilling. Denne stilling er som sagt vist i den øverste del af fig. 1. Her indgriber kuglerne 85 i stempelstangens not 89 for at sikre en stor blokeringskraft eller holdekraft i den fuldt udtrukne stilling.When adjusting the spring bias 98, it is determined at which pressure in the bottom hole 62 s temp. The pliers must be pushed to the fully extended position after the blocking 15 at the additional blocking rod 74 is lifted. To this end, the spring sleeve 97 releases a valve compartment 102 in which the pressure built up therein via the channel 94, a radial bore 103a and a valve bore 103 pushes the cup-shaped gasket 96 back against the spring force. As a result, the compressed air can flow 20 through radial bores 104, 105 and reach the blocking pressure chamber 93 and thus retract the additional blocking piston 78 to the right and down, respectively, so that its sleeve-shaped section 81 releases the balls which can be pushed out of the groove 83 when the piston 53 as a result of the pressure in the cylinder chamber 25 65 is pushed all the way to the left or upwards respectively in the fully extended position. This position is as shown in the upper part of FIG. 1. Here, the balls 85 engage the groove rod groove 89 to ensure a high blocking force or holding force in the fully extended position.

30 Når derimod trykket i bundhullet 62 forbliver under en forudbestemt trykværdi på f.eks. 5 bar, udskydes stemplet kun et delslag eller udluftningsslag. Ved denne i fig. 2 viste driftstilstand er trykket i ventilboringen 103 ikke tilstrækkeligt til at løfte den skålformede pakning 96 og tilve-35 jebringe forbindelsen til de radiale boringer 104, 105 via ventilrummet 102. I dette tilfælde findes der en lækageluft- DK PR 172502 B1 13 forbindelse mellem blokeringstrykkammeret 93 ved det ekstra blokeringsstempel 78 og den radiale boring 105 langs fjederbøsningens 97 yderside og udefter. Ved hjælp af denne lækagesikring forhindres, at der ved tilsmudsning eller opslidning 5 af skifte-vent i len indtræder en utilsigtet frigivelse af kuglerne 82 ved forskydning af det yderligere blokeringsstempel 78. Den ekstra blokeringsstang 74 forbliver altså i den blokerede højre henholdsvis nederste stilling. Derved kan stemplet 53 ved opbygning af trykket i det andet cylinderrum 65 10 kun forskydes så langt opefter, til anslaget 72 når til anlæg mod blokeringsstangens 70 endeflade 73 i stempelstangen 51 og fastholder stempelstangen i denne position. Kuglerne 85 er derved frigivet fra noten 89 i stempel stangen af den forudgående tilbagestilling af stemplet, som blev omtalt i for-15 bindelse med den nederste del af fig. 1.On the other hand, when the pressure in the bottom hole 62 remains below a predetermined pressure value of e.g. 5 bar, the plunger is only pushed out a partial stroke or vent stroke. In the case of FIG. 2, the pressure in the valve bore 103 is not sufficient to lift the bowl-shaped gasket 96 and provide the connection to the radial bores 104, 105 via the valve space 102. In this case, there is a leakage air connection between the blocking pressure chamber. 93 at the additional blocking piston 78 and radial bore 105 along the outer and outer faces of the spring sleeve 97. This leakage protection prevents the accidental release of the balls 82 by displacing the additional blocking piston 78 by soiling or wearing 5 of the shift valve in the shaft. Thus, the additional blocking rod 74 remains in the blocked right or lower position, respectively. Thereby, the piston 53, when the pressure in the second cylinder compartment 65 10 is built up, can only be displaced so far upwards until the stop 72 reaches the end surface 73 of the blocking rod 70 in the piston rod 51 and holds the piston rod in this position. The balls 85 are thereby released from the groove 89 in the piston rod by the prior resetting of the piston, which was discussed in connection with the lower part of FIG. First

Til tilbagestilling henholdsvis lukning af røgaf-træk sk lapperne tilføres der i afhængighed af udførelsesformen ifølge fig. 1 eller 2 et af de to bundhuller 61, 62 trykluft af et tryk, der i dette tilfælde er ukritisk. Der henvises 20 specielt til den nederste del af fig. 1. Til tilbagestilling af stempelstangen henholdsvis til lukning af røgaftræksklappen, der står i forbindelse med stempelstangen, tilføres bundhullet 61 et tryk, der forplanter sig langs stempelstangen i overtrykskammeret 45 og i det første cylinderrum 63.For resetting and closing of the smoke extractors, respectively, the patches are supplied depending on the embodiment of FIG. 1 or 2 is one of the two bottom holes 61, 62 of compressed air of a pressure which in this case is uncritical. Reference is made in particular to the lower part of FIG. 1. For resetting of the piston rod and, respectively, for closing the smoke exhaust flap which is in communication with the piston rod, the bottom hole 61 is supplied with a pressure which propagates along the piston rod in the overpressure chamber 45 and in the first cylinder space 63.

25 Derved forskydes stempelstangen 53 mod højre henholdsvis nedefter til anslaget ved cylinderbunddækslet 42. Derved kommer kuglerne 84 ind 1 blokeringsstangens 70 ringformede not 88 og holdes der ved hjælp af det med fjederkraft hen over disse skubbede bøsningformede afsnit 86. Herudover føres fø-30 ringsstangen 71 og den ekstra blokeringsstang 74 over anslaget 72, der ved boringens 68 ende støder an mod stempelstangen, mod højre henholdsvis nedad til endestillingen, som den indtager til slaglængdebegrænsning henholdsvis til indstilling af en slaglængde. I dette tilfælde falder kuglerne 82 35 ind i noten 83 i den ekstra blokeringsstang og fastholdes i denne position ved det under fjederkraft ved hjælp af det mod DK PR 172502 B1 14 venstre henholdsvis opadtil forskudte ekstra blokeringsstempel 78.Thereby the piston rod 53 is displaced to the right or downwardly, respectively, to the stop at the cylinder bottom cover 42. Thereby the balls 84 enter into the annular groove 88 of the blocking rod 70 and are held by means of the spring force over these pushed bush-shaped sections 86. In addition, the guide rod 71 is guided. and the additional blocking rod 74 over the stop 72, which abuts the piston rod at the end of the bore 68, to the right and down, respectively, to the end position which it occupies for stroke length limitation and stroke adjustment, respectively. In this case, the balls 82 35 fall into the groove 83 in the additional locking rod and are held in this position by the spring force by means of the additional locking piston 78 which is displaced against DK PR 172502 B1 14 respectively.

Vedrørende fig. 1 og 2 bemærkes endvidere, at cy-lindertopdækselet 41 og cylinderbunddækslet 42 i begge figu-5 rer indtager med hinanden ombyttede stillinger, hvilket som følge af trykluftcylinderens opbygning uden videre er muligt, hvorved dog bundhullerne 61 og 62 skifter funktion. Ved ombytning af cylindertopdækselet 41 med cylinderbunddækslet 42 er det muligt at ændre anbringelsen af trykluftcylinderen 10 på bundhullerne 61 og 62 alt efter indbygningsforudsætningerne.With regard to FIG. 1 and 2, it is further noted that in both figures, the cylinder top cover 41 and the cylinder bottom cover 42 occupy exchanged positions, which, as a result of the construction of the compressed air cylinder, is easily possible, however, the bottom holes 61 and 62 change function. By replacing the cylinder top cover 41 with the cylinder bottom cover 42, it is possible to change the position of the compressed air cylinder 10 on the bottom holes 61 and 62 according to the installation conditions.

Tilbagestillingen kan ske både fra den fuldt udtrukne stilling i den øverste del af fig. 1 som beskrevet ovenfor, såvel som fra delslagsstillingen i fig. 2, hvorved 15 kuglerne 85 ikke behøver at være frigivet, da de her ikke er faldet ind i stempelstangens not 89.The reset can occur both from the fully extended position in the upper part of FIG. 1 as described above, as well as from the partial position of FIG. 2, whereby the 15 balls 85 need not be released since they have not fallen into the piston rod groove 89 here.

I fig. 3 og 4 er vist de samme stempelstangsstillinger som i fig, 1 og 2, men for en trykluftcylinder, der kun har et cylinderrør 9. Stempelstangen 106 er her igen for-20 synet med en boring 107 til lejring af et anslag 108 på en føringsstang 109. Føringsstangen er ved sin modsatte ende indskruet i en ekstra blokeringsstang 110, som forløber gennem det med en ansats 111 forsynede blokeringsstempel 112 i en ydre blokeringscylinder 113. Den ydre blokeringscylinder 25 113 er med de heri monterede dele indbefattende en påsat skifte-ventil 95 opbygget på samme måde som den ydre blokeringscylinder 77 med skifte-ventilen 95, således at en gentagelse af beskrivelsen er overflødig. Til forskel fra udførelsesformen ifølge fig. 1 og 2 er der ved udførelsesformen 30 ifølge fig. 3 og 4 henvist til cylinder topdækselet 1 og cylinderbunddækslet 2. Mellem et bundhul 27 i cylindertop-dækslet 1 og et cylinderrum 9a henholdsvis et blokeringstrykkammer 22 er anbragt forbindelseskanaler. Analogt hermed findes der forbindelseskanaler mellem et bundhul 30 i et 35 cylinderbunddæksel og et andet cylindertrykkammer 9b på den ene side samt et b1oker ingstrykkammer.In FIG. 3 and 4, the same piston rod positions are shown as in Figs. 1 and 2, but for a compressed air cylinder having only one cylinder tube 9. The piston rod 106 is again provided with a bore 107 for mounting a stop 108 on a guide rod. 109. The guide rod is screwed at its opposite end into an additional blocking rod 110 which extends through the locking piston 112 provided with a stop 111 in an outer blocking cylinder 113. The outer blocking cylinder 25 113 is provided with the parts mounted therein including a switching valve 95. constructed in the same manner as the outer blocking cylinder 77 with the switch valve 95, so that repetition of the description is superfluous. Unlike the embodiment of FIG. 1 and 2, in the embodiment 30 of FIG. 3 and 4 refer to cylinder top cover 1 and cylinder bottom cover 2. Between channels a bottom hole 27 in the cylinder top cover 1 and a cylinder compartment 9a or a blocking pressure chamber 22, respectively, are provided. By analogy, there are connecting ducts between a bottom hole 30 in a 35 cylinder bottom cover and a second cylinder pressure chamber 9b on one side as well as a booking pressure chamber.

DK PR 172502 B1 15DK PR 172502 B1 15

Blokeringstrykkammeret 23 står her igen via en kanal 94 i forbindelse med blokeringstrykkanuneret 93 i det ekstra blokeringsstempel 78.The blocking pressure chamber 23 here again stands via a channel 94 in connection with the blocking pressure cannula 93 in the additional blocking piston 78.

Det skal her bemærkes, at delslagsblokeringen ved 5 samtlige udførelsesformer ifølge fig. 1-4 let kan udløses ved udtrækning af det ekstra blokeringsstempel 78. Det bageste blokeringsstempel 112 kan sammen med den ydre blokeringscylinder 113 ligeledes let udtrækkes til ophævelse af delslagsstillingen, idet der indføres et værktøj i bundhullet 115.It should be noted here that in all embodiments of FIG. 1-4 can be easily triggered by extracting the additional blocking piston 78. The rear blocking piston 112, together with the outer blocking cylinder 113, can also be easily retracted to remove the partial stroke position by inserting a tool into the bottom hole 115.

10 Den trykmediumaktiverede skifte-ventil 95 kan også indsættes som nødventil, især ved trykluftcylindre, der er udformet som enkeltslagcylindre, i et ledningsnet ved en trykmediumaktiveret indretning til røgaftræksaktivering.The pressure medium actuated switch valve 95 may also be inserted as an emergency valve, especially for compressed air cylinders designed as single stroke cylinders, in a conduit network of a pressure medium actuated device for smoke extraction activation.

Herudover er skifte-ventilen 95 forsynet med en 15 tilslutningsplade 116, se fig. 5 og 6. Skifte-ventilen 95 og tilslutningspladen 116 som helhed tjener som nødventil. Den trykmediumaktiverede skifte-ventils opbygning og funktionsprincip er det samme som foran beskrevet. Henvisningsbetegnelserne for de enkelte elementer i skifte-ventilen bibe-20 holdes derfor i fig. 5 og 6.In addition, the shift valve 95 is provided with a connection plate 116, see FIG. 5 and 6. The alternating valve 95 and the connecting plate 116 as a whole serve as an emergency valve. The design and operating principle of the pressure-medium-activated switch valve are the same as described above. The reference numerals for the individual elements of the switch valve are therefore maintained in FIG. 5 and 6.

Tilslutningspladen 116 er udformet tilnærmelsesvis kasseformet med mindst en plan side 117, som ligger tæt an mod en ligeledes plan side 118 på skifte-ventilen. Disse to elementer holdes fast sammen med ikke viste unbrakoskruer, 25 der forløber gennem boringerne 1 tilslutningspladen 119, 120 og er indskruet i gevindhuller 1 skifte-ventilen.The connecting plate 116 is formed approximately box-shaped with at least one flat side 117 which is adjacent to a similarly flat side 118 of the switch valve. These two elements are held together by not shown Allen screws 25 extending through the bores 1 of the connecting plate 119, 120 and screwed into the threaded holes in the shift valve.

Fastgørelseshuller til montage af nødventilen er betegnet med 121, 122. En første tilslutningsboring 123, i hvilken der på tværs strækker sig en første tilslutnings-30 boring 124, tjener til tilslutning af en første ledning, der står under kontrolleret tryk fra trykmediet. Denne overgår i den påsatte skifte-ventils påsatte radiale boring 103a. En anden tilslutningsboring 125 til tilslutning af en fraledende anden ledning står via et reduceret boringstværsnit 126 i 35 forbindelse med en tværboring 127, hvorfra en anden forbindelsesboring og en tredie forbindelsesboring 128, 129 udgår DK PR 172502 B1 16 vinkelret på den anden tilslutningsboring og tværboringen og overgår i den radiale boring 104 henholdsvis 105 i den påmon-terede skifte-ventil. Tværboringen er lukket af en gevindprop 130.Attachment holes for mounting the emergency valve are designated 121, 122. A first connection bore 123 in which extends transversely a first connection bore 124 serves to connect a first conduit under controlled pressure from the pressure medium. This transitions into the applied radial bore 103a of the switching valve. Another connection bore 125 for connecting a conductive second conduit is connected via a reduced bore cross-section 126 to a cross bore 127, from which a second connection bore and a third connection bore 128, 129 extend perpendicular to the second connection bore and the transverse bore. exits in the radial bore 104 and 105, respectively, of the mounted shift valve. The cross bore is closed by a threaded plug 130.

5 Alt efter det tryk, som tilføres den således opbyg gede nødventil 95, 116, tilvejebringes herved en trykmedium-ledende forbindelse mellem den første tilslutningsboring 124 og den anden tilslutningsboring 125: Når trykket i den første trykmediumtilslutning 10 (tilslutningsbsoring) 123 ikke når op på en forudbestemt mindsteværdi, trykkes den skålformede pakning 96 i den i fig.5 Depending on the pressure applied to the emergency valve 95, 116 thus constructed, a pressure medium conductive connection is provided between the first connection bore 124 and the second connection bore 125: When the pressure in the first pressure medium connection 10 (connection bore) 123 does not reach a predetermined minimum value, the cup-shaped gasket 96 is printed in the FIG.

5 viste hvilestilling mod ventilsædet 114 under indvirkning af fjederbøsningen 97 og fjederen 98. Derved afbrydes en trykmediumledende forbindelse mellem den første tilslutnings-15 boring og den anden tilslutningsboring. En udligning af trykket ved den anden tilslutningsboring 125 kan ske via den tredie forbindelsesboring 129, den radiale boring 105 langs ydersiden af fjederbøsningen 97 og ud til omgivelserne. Når trykket ved den første tilslutningsboring 123 imidlertid er 20 så højt, at den skålformede pakning 96 løftes fra ventilsædet 114 i mod fjederens 98 kraft, dannes en trykmediumledende forbindelse mellem den første tilslutningsboring via den første forbindelsesboring 124, den radiale boring 103a, ventilboringen 103, ventilrummet 102, de radiale boringer 25 104, 105, der ligesom de dertil sluttede forbindelsesboringer 128, 129 ligger parallelt, via tværboringen 127 til den anden tilslutningsboring 125.5 to the valve seat 114 shown under the action of the spring sleeve 97 and the spring 98. A pressure medium conducting connection between the first connection bore and the second connection bore is thereby interrupted. An equalization of the pressure at the second connection bore 125 can be made via the third connection bore 129, the radial bore 105 along the outside of the spring sleeve 97 and out to the surroundings. However, when the pressure at the first connection bore 123 is so high that the cup-shaped gasket 96 is lifted from the valve seat 114 against the force of the spring 98, a pressure medium conducting connection is formed between the first connection bore via the first connection bore 124, the radial bore 103a, the valve bore 103, valve space 102, the radial bores 25 104, 105 which, like the connecting bores 128, 129 thereto, are parallel, via the transverse bore 127 to the second connection bore 125.

I den i fig. 7 skematisk viste trykluftcylinder-indretning er tilvejebragt en trykluftcylinder 131 med ende-30 stillingsblokering samt en dobbeltslagcylinder 132 til aktivering af en røg- og varmeaftræksklap 133 henholdsvis 134.In the embodiment shown in FIG. 7 schematically illustrated compressed air cylinder device is provided a compressed air cylinder 131 with end position blocking as well as a double stroke cylinder 132 for activating a smoke and heat extractor valve 133 and 134 respectively.

En som ovenfor beskrevet trykstyret skifteventil 135 er integreret med dobbeltslagcylinderen 132. Til trykluftcylin-derindretningen hører endvidere en håndstyreventil 136, hvis 35 ene udgang via ledninger 137, 138, 139 står i forbindelse med ikke betegnede indgange henholdsvis bundhuller i trykluftcy- DK PR 172502 B1 17A pressure controlled switching valve 135 as described above is integrated with the double stroke cylinder 132. The compressed air cylinder device also includes a hand control valve 136, whose one output via wires 137, 138, 139 is connected to non-designated inputs and bottom holes respectively in compressed air cylinders, DK PR 172502 B1. 17

Underen 131 og dobbeltslagcylinderen 132 for at forskyde røg- og varmeaftræksklapperne til den lukkede stilling. Til aktivering af røg- og varmeaftrsksklapperne i den modsatte retning til åbning er en yderligere udgang fra håndstyreven-5 tilen via ledninger 140, 141 forbundet med tryklufttilførslen henholdsvis et bundhul i dobbeltslagcylinderen 132. Fra et forbindelsessted 142 afgrener sig en trykmediumledning bestående af afsnit 143, 144, hvori en nødventil 145 er indsat. Nødventilen er også trykstyret. Trykmediumledningen bestående 10 af afsnittene 143, 144 fører til en tryklufttilførsel henholdsvis et bundhul i enkeltslagcylinderen 131. Når der på håndstyreventilen 136 er indstillet et i ledningen 140 indtrædende tryk, der ikke overskrider et forudbestemt tryk, forskyder dobbeltslagcylinderen 132 røg- og varmeventila-15 tionsklapperne 134 ind i en første åben stilling, eftersom skifte-ventilen 135 hindrer en videregående stempelvandring. Eftersom den trykstyrede nødventil 145 i dette trykområde afbryder trykmediumledningen bestående af afsnittene 143, 144, aktiveres ikke røg- og varmeaf træksklapperne 133. Først 20 i tilfælde af alarm, når trykket ved håndstyreventilen overskrider et forudbestemt tryk, leder nødventilen 145 dette tryk ind i afsnittet 144 af trykmediumledningen og derfra videre ind i enkeltslagcylinderen 131, der således svinger røg- og varmeaftræksklapperne 133 ind i den åbne alarmstill-25 ing. Herudover frigiver nødventilen 135 i dobbeltslagcylinderen 132 dobbeltslagcylinderens videregående alarmslaglængde, hvilket yderligere åbner røg- og varmeaftræksklappen 134 tilsvarende meget.Lower 131 and double stroke cylinder 132 to displace the smoke and heat extraction valves to the closed position. For activating the smoke and heat exhaust flaps in the opposite direction for opening, a further output of the hand control valve via wires 140, 141 is connected to the compressed air supply and a bottom hole, respectively, of the double stroke cylinder 132. From a connection point 142, a pressure medium line consisting of section 143 is branched. 144, wherein an emergency valve 145 is inserted. The emergency valve is also pressure controlled. The pressure medium line consisting of sections 143, 144 leads to a compressed air supply or a bottom hole, respectively, in the single stroke cylinder 131. When a pressure entering the line 140 is set which does not exceed a predetermined pressure, the double stroke cylinder 132 removes the smoke and heat valve valves 136. 134 into a first open position, since the shift valve 135 prevents a further piston travel. Since the pressure controlled emergency valve 145 in this pressure area interrupts the pressure medium line consisting of sections 143, 144, the smoke and heat release flaps 133. The first 20 in case of alarm when the pressure at the control valve exceeds a predetermined pressure, the emergency valve 145 directs this pressure into the section. 144 of the pressure medium line and thence further into the single stroke cylinder 131, thus pivoting the smoke and heat extraction valves 133 into the open alarm position. In addition, the emergency valve 135 in the double stroke cylinder 132 releases the upper alarm stroke length of the double stroke cylinder, which further opens the smoke and heat exhaust flap 134 correspondingly much.

Mange varianter af trykluf tcylinder indretningen er 30 tænkelige, hvori nødventilen og skifte-ventilen, der begge er trykstyrede og 1 det væsentlige ens i henseende til konstruktion, hensigtsmæssigt kan indsættes.Many variants of the compressed air cylinder device are conceivable in which the emergency valve and the shift valve, both pressure controlled and substantially similar in construction, can conveniently be inserted.

Claims

1. Compressed air cylinder designed as a double stroke cylinder for activating smoke extraction valves in smoke and heat extraction systems with two-sided end position blocks, with a double-side actuable piston (53) slidable in a cylinder with two cylinder chambers (63, 65; 9a, 9b) , as well as with a piston rod (56; 106), in which the locking elements designed as balls (84, 85) are held via spring-loaded blocking pistons (43, 75) in the notes of the piston rod (51; 10 106), and the piston rod at least as an altar native to one of the two-sided end position blocks is operable in an intermediate position between the end positions, characterized in that coaxially with the piston rod (51; 106) and displaceable relative to this directly or indirectly to a stop on the piston rod (end surface 73) is arranged. an additional blocking rod (74; 110), which restricts a sub-layer of the piston rod (51; 106) and in this partial position projects into an outer, on a ( 75) of the blocking pistons disposed of the blocking cylinder (77; 113), 20 in which an additional blocking piston (78) is slidably mounted and which, with a sleeve-shaped portion (81) in the partial position, encloses balls (82) which engage an annular groove (83) in the additional blocking rod and are otherwise radially displaceable which additional blocking rod releases the 25 radially outwardly displaceable balls (82) when axially removed from them, and that the excess blocking piston (78) via a pressure-controlled switch valve (95) is in contact with a predetermined pressure the next, next to located cylinder compartment (65).

Compressed air cylinder according to claim 1, characterized in that a locking or blocking piston (43; 75; 112) on both sides outside the closed cylinder chambers (63, 65; 9a, 9b) and each located in the vicinity of one of these cylinder chambers is concentrically displaceable relative to the piston rod DK PR 172502 B1 (51; 106), and there is 1 pressure medium conducting connection with the nearest cylinder chamber (63, 65; 9a, 9b), that each blocking piston (43, 44; 112) has a sleeve-shaped section (86 87) enclosing radially and roll-displaceable balls 5 (84, 85) in a locking position, said balls being partially engaged with an annular, in connection with the piston rod (51; 106, standing groove (88, 89)), and which release the balls radially for outward displacement when displaced axially away from them, that the additional locking rod (74; 110) in the partial stroke protrudes from one (75) of the two locking pistons and that the outer blocking cylinder ( 77; 113) is located externally on this block ring of honor (75).

Compressed-air cylinder according to claim 1, characterized in that a guide rod (71, 109) is slidably mounted in a bore (68, 107) in the piston rod (51; 106), the one end of the guide rod having a stop (72; 108). , which restricts the reciprocal displacement of the piston rod and guide rod and the other end of which is associated with the additional blocking rod (74; 110).

Compressed air cylinder according to claim 2, characterized in that the balls (84, 85) in the position inserted in the groove (88, 89) in the circumferential direction of the groove abut each other annularly.

A compressed air cylinder according to any one of claims 1-4, characterized in that the double-sided actuable piston (53) is fixed between the piston rod (51) and a blocking rod (70) which aligns with the piston rod and that the blocking rod (70). ), as well as the piston rod (51), is provided with an annular groove (88, 89) for partially accommodating the blocking balls (84, 85).

Compressed-air cylinder according to any one of claims 1-5, characterized in that each blocking piston (43; 75; DK PR 172502 B1 112) is pressed against the adjacent balls (84, 85) by at least one spring.

Compressed air cylinder according to any one of claims 1-6, characterized in that each blocking piston (43; 75; 5 112) has a section projecting from the compressed air cylinder.

Compressed air cylinder according to any one of the preceding claims, characterized in that a lip seal is provided, respectively, on the blocking piston (43; 75; 112) which is slidably arranged on the plunger 10 (51; 106).

Compressed air cylinder according to any one of the preceding claims, characterized in that each of the two ends or one end of the compressed air cylinder (77) is closed by a stop cap (80a and 80) which is concentric with the piston rod (51; 106). ), respectively, the locking rod (70) forms at least one spring take-up space and a stop for the locking piston.

Compressed-air cylinder according to claim 9, characterized in that the blocking piston (43) emerging from one of the stop covers 20 (80a) has a bore through which the piston rod (51; 106) is slidably guided.

Compressed air cylinder according to claim 9 or 10, characterized in that the additional blocking piston (78) is closed out of the impact cover (80) of the blocking cylinder (80) of the blocking cylinder and that in this section a support part (90) is flush with the blocking rod and with a spring is pressed against the end surface of the blocking rod.

Compressed air cylinder according to any one of claims 1, 3-11, characterized in that the balls (84, 85) in a ball sleeve are rollable and radially displaceable. DK PR 172502 B1

Compressed air cylinder according to claims 1, 2, 4, 8 and 9, characterized in that the additional blocking piston (78), the supporting part (90) and the stop cap (80) with the spring receiving space are arranged concentrically and at least partially enclosing one another , one around the other.

Compressed-air cylinder according to any one of the preceding claims, characterized in that two pressure medium connections (bottom holes 61, 62) of the two cylinder chambers (63, 65) are arranged on the cylinder top cover (41) and the cylinder top cover and the cylinder bottom cover (42) are mutually interchangeable.

Compressed air cylinder according to any one of claims 1-13, characterized in that one of the two cylinder chambers (9a, 9b) of pressure medium connections (bottom holes 27 and 30, respectively) is arranged on the cylinder top cover and the cylinder bottom cover 15 respectively, and that each pressure medium connection is opposite a similarly designed blind connection (bottom hole 28 and 29, respectively).

Compressed air cylinder according to any one of the preceding claims, characterized in that the cylinder top cover (41), the cylinder bottom cover (42), the blocking pistons (43; 75; 112), the stop cap (80, 80a), the ball bushings, the blocking rod (70) and the support part ( 90) consists of an AlCuMgPb alloy.

Compressed air cylinder according to claim 16, characterized in that the piston rod (51; 106) consists of V2A steel.

A compressed air cylinder according to claim 1, characterized in that the switching valve (95), by failing a predetermined pressure, forms a leaking air connection (ducts 104, 105. outwardly of a blocking pressure chamber (93) at the additional blocking piston (78).

19. A compressed air cylinder according to claim 1 or 18, characterized in that the switching valve (95) has a spring-loaded cup-shaped gasket (96) which on one side against a valve space (102) closes a valve bore (103). , which is associated with a pressure medium supply, in which valve space radially bores 5 bores (104, 105).

Compressed-air cylinder according to claim 19, characterized in that the valve bore (103) of the switching valve (95) is connected to the next pressure chamber, next to the cylinder chamber (65), and that the radial bores (104, 105) lead 10 to a blocking pressure chamber (93) in the outer blocking cylinder (77).