EP0485781B1 - Retention valve for compressed air inlet - Google Patents

Retention valve for compressed air inlet Download PDF

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Publication number
EP0485781B1
EP0485781B1 EP91118206A EP91118206A EP0485781B1 EP 0485781 B1 EP0485781 B1 EP 0485781B1 EP 91118206 A EP91118206 A EP 91118206A EP 91118206 A EP91118206 A EP 91118206A EP 0485781 B1 EP0485781 B1 EP 0485781B1
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EP
European Patent Office
Prior art keywords
compressed air
sealing member
bolt
air inlet
air supply
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP91118206A
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German (de)
French (fr)
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EP0485781A1 (en
Inventor
Otto Feldbinder
Jan-Dirk Beckmann
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Feldbinder and Beckmann Fahrzeugbau GmbH and Co KG
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Feldbinder & Beckmann oHG
Feldbinder & Beckmann Fahrzeugbau oHG
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Publication of EP0485781A1 publication Critical patent/EP0485781A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
    • B65D88/706—Aerating means, e.g. one-way check valves

Definitions

  • the invention relates to a compressed air inlet check valve according to the preamble of claim 1.
  • Bulk goods receptacles which are emptied via a discharge device with a funnel-shaped outlet, are subject to the risk of bulk material bridging, which can be prevented if the bulk material in the discharge area is loosened by compressed air.
  • the devices mentioned worked unsatisfactorily, be it that the lifespan of filter fabrics and bags covered with fabric is relatively short, or that the bulging rubber membranes of the air cushions prevent the bulk material from sliding freely and check valves could not prevent bulk material from entering the compressed air supply lines, in particular in retirement, invaded.
  • DE-A-29 50 050 discharge devices for bulk containers provided with a funnel-shaped outlet have been proposed in the form of one or more vibrating plates which form part of the wall of the funnel part of the bulk container.
  • Each vibrating plate should preferably be surrounded by rubber sealing strips, held in the wall of the bulk material container and supported by additional elastic support elements.
  • Such a system has the advantage that there are no flow channels that can be contaminated, but the additional emptying effect due to the inflowing compressed air is missing during the discharge.
  • there is a lack of a self-cleaning effect so that over time the risk of contamination and thus a reduction in the use of such systems is relatively great.
  • valve membrane is clamped only on its outer sides and, when compressed air is supplied, expands elastically in such a way that in its stretched state, through-openings are opened in its plane, which are closed in the unloaded state.
  • the functionality of this rubber membrane depends crucially on the fact that its through openings in the stretched state are sufficiently large to allow a sufficient amount of compressed air to pass through, while the same through openings in the unloaded state should also seal tightly so that the bulk material material cannot penetrate here.
  • valve bodies are relatively susceptible to wear.
  • a compressed air inlet check valve is already known for arrangement in or on an outlet funnel wall of a silo container for dry, in particular powdery bulk material, with an elastic sealing body which is held by a holding member in his seat arranged at the inlet mouth of a flanged compressed air supply nozzle is pressed and which, with increasing air pressure at the inlet mouth, is elastically deformable until a release of an air outlet opening that arises between the sealing body and the seat, the elastic sealing body being a hood-shaped or hat-shaped hollow profile with a compressed air supply nozzle has open side, the end face of the annular surfaces in the compressed air-free state lies snugly on the seat and the elastic sealing body with a coaxial part of its hollow profile outer wall on an outer Support body rests, which is releasably attached to the outlet funnel wall.
  • this configuration is not suitable for opening even at low air pressure, since to ensure the function of the sealing body, the outer support body must be
  • the annular surface of the sealing body is collar-shaped or brim-shaped, which results in better sealing of the valve if no compressed air is supplied.
  • the outer and the inner support body are held centered by a coaxial bolt which is detachably connected to the outlet funnel wall.
  • the inner support body is pressurized by a spring, which is supported on the raw profile outer wall.
  • the bolt preferably has a transverse bore for receiving a transverse bolt, which extends over one in the air supply nozzle Arranged bayonet lock is held releasably. This creates a firm but detachable connection of the support body or the support body to the outlet funnel wall.
  • the spring is a spiral spring which is placed over the bolt and engages around it.
  • the bolt should be linearly movable against the spring force and in the normal direction to the outlet funnel wall surface and be rotatable in such a way that the cross bolt can be unlocked from the bayonet catch.
  • the sealing body is preferably made of plastic, such as silicone rubber, natural rubber or NBR (acrylonitrile-butadiene copolymer).
  • plastic such as silicone rubber, natural rubber or NBR (acrylonitrile-butadiene copolymer).
  • NBR acrylonitrile-butadiene copolymer
  • a smaller compressor may be sufficient for this.
  • an air supply nozzle 12 which is provided with the compressed air inlet check valve 10 according to the invention, opens into an outlet funnel wall 11 of a silo container (not shown).
  • the essential parts of this compressed air inlet check valve 10, including its attachment, are the bayonet lock 13, which is fixedly connected to the air supply connector 12, and can be locked by means of a recess 13b for a cross bolt 14, which is provided through a transverse bore 15 in the bolt 16 for centering and holding the inner support body 17, the elastic one Sealing body 18 and the outer support body 19 is used.
  • the elastic sealing body 18 has a truncated cone profile on the outside and is designed as a hollow body with only one side open to the air supply nozzle 12. This sealing body 18 also has a collar 18a or an outer circumferential bead which fits snugly on the inner surface 11a of the outlet funnel wall 11.
  • the outer support body 19 also has a hood-shaped or hat-shaped hollow profile and on its inside a shape corresponding to the outer contour of the sealing body 18, the support body 19 resting on an upper part 18b of the outer wall of the sealing body 18 with a coaxial region of its inside.
  • Another, inner support body 17 also has a hood-shaped or hat-shaped hollow profile and is adapted in its outer contour to the inside of the sealing body 18 such that the sealing body 18 rests with an upper part 18c of its hollow profile inner wall on a coaxial region of the outer edge of the supporting body 17.
  • the arrangement is therefore such that the outer support body 19 and the inner support body 17 together partially enclose the sealing body 18 on both sides, namely in its upper region spaced from the outlet funnel wall 11 and that the free region which is not bordered by the support bodies 17, 19 18 d rests with its outer edge on the outlet funnel wall 11.
  • the other components are explained individually using the description of the assembly.
  • the cross bolt 14 is inserted into the cross bore 15, then a first washer 10, a coil spring 21 and an upper washer 22 are pushed in sequence over the bolt 16, before the respective coaxial bores 117, 118, 119 have bodies 17 to 19 in the order inner Support body 17, sealing body 18 and outer support body 19 are pushed or unscrewed.
  • the bolt 16 has an external thread 116 at its end opposite the transverse bore 15, which has a corresponding thread Internal thread 123 can be screwed into the bore 119 of an attachment part 23 of the upper support body 19.
  • the attachment part 23 can, however, also be a separate union nut.
  • the bolts 14 and 16 are inserted into the bayonet lock, the washer 20 and the washer 22, which are supported on the inner surface 11a and on the support body 17, respectively serving as engagement surfaces for the spring 21.
  • the spring 21 is pushed through Pressure on the bolt 16 is initially further compressed in order to allow the bolt 14 to be rotated, for example by 90 °, into the recess 13b with the contact edge 13c.
  • the bolt 16 After a corresponding rotation of the bolt 15, the bolt 16 is relieved of pressure, so that the bolt 14 rests against the contact edge 13c and is secured against rotation, the force of the spring 21 causes the outer and inner support bodies 17, 19 and the sealing body in between 18 held at a predetermined distance from the outlet funnel wall 11. This distance is dimensioned such that the collar 18a of the sealing body 18 fits snugly and under slight prestress on its seat 11a on the outlet funnel wall 11. The expansion is in the opposite direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Detergent Compositions (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Abstract

In order to develop a retention valve (10) for a compressed air inlet for arrangement in or on an outlet funnel wall (11) of a silo container for dry, in particular pulverulent bulk material, with an elastic sealing member (18) which is pressed in its seat (11a) on the inlet mouth (12a) of a flanged-on compressed-air supply pipe (12) by a holding member and which, in the event of rising air pressure at the inlet mouth (12a), is elastically deformable until exposure of an air outlet opening arising between the sealing member (18) and the seat (11a), in such a manner that this valve is simply removed and easily exchangeable, compressed air delivery being possible in the operating condition to all sides parallel to the container wall surface and a vibration additionally being caused, it is proposed that the elastic sealing member (18) has a hood-shaped or hat-shaped hollow section with a side open to the compressed-air supply pipe (12), its frontal annular surfaces (18) resting snugly on the seat (11a) in the state in which it is unstressed with compressed air and that the elastic sealing member (18) bears with a coaxial part (18b) of its hollow-section outer wall on an outer support member (19) which is fastened removably on the outlet funnel wall (11). <IMAGE>

Description

Die Erfindung betrifft ein Drucklufteinlaßrückschlagventil nach dem Oberbegriff des Anspruchs 1.The invention relates to a compressed air inlet check valve according to the preamble of claim 1.

In Schüttgut-Aufnahmebehältern, die über eine Austragsvorrichtung mit trichterförmigem Auslauf entleert werden, besteht die Gefahr der Schüttgut-Brückenbildung, die verhindert werden kann, wenn das Schüttgut im Austragsbereich durch Druckluft aufgelockert wird.Bulk goods receptacles, which are emptied via a discharge device with a funnel-shaped outlet, are subject to the risk of bulk material bridging, which can be prevented if the bulk material in the discharge area is loosened by compressed air.

So ist bereits der Vorschlag gemacht worden, über dem Auslauf auf Stützen in dem konischen Auslaufteil Brechkegel anzuordnen, die mit einer Druckluftzuführung versehen und an ihrer noch oben gerichteten Mantelfläche mit einem luftdurchlässigen Filtergewebe überspannt werden. Daneben sind auch innen an der konischen Wandung angeordnete, gleichfalls mit Druckluftzuführungen versehene und mit einem luftdurchlässigen Gewebe überspannte Taschen bekannt. Es ist auch schon vorgeschlagen worden, die Druckluft stoßweise in aus Gummimembranen bestehende Luftkissen einzuleiten, die sich dabei aufblähen und die Materialbrücken zerstören sollen. Schließlich hat man auch schon Druckluftzuleitungen mit Rückschlagklappen versehen. Die genannten Vorrichtungen arbeiteten jedoch unbefriedigend, sei es, daß die Lebensdauer von Filtergeweben und mit Gewebe überspannten Taschen relativ kurz ist oder die sich stark aufwölbenden Gummimembranen der Luftkissen ein ungehindertes Nachrutschen des Schüttgutes verhindern und Rückschlagklappen nicht verhindern konnten, daß Schüttgut in die Druckluftzuleitungen, insbesondere in Ruhestandszeiten, eindrang.The proposal has already been made to arrange crushing cones above the outlet on supports in the conical outlet part, which are provided with a compressed air supply and are covered with an air-permeable filter fabric on their lateral surface which is still directed upwards. In addition, pockets arranged on the inside of the conical wall, also provided with compressed air feeds and covered with an air-permeable fabric, are also known. It has also been proposed to introduce the compressed air intermittently into air cushions consisting of rubber membranes which are to inflate and destroy the material bridges. After all, compressed air supply lines have already been provided with non-return flaps. However, the devices mentioned worked unsatisfactorily, be it that the lifespan of filter fabrics and bags covered with fabric is relatively short, or that the bulging rubber membranes of the air cushions prevent the bulk material from sliding freely and check valves could not prevent bulk material from entering the compressed air supply lines, in particular in retirement, invaded.

Es ist daher in der DE-B-22 62 082 vorgeschlagen worden, Druckluftleitungen in Sitzflächen für Dichtungsplatten aus einem weichen Material einmünden zu lassen, die von einseitig befestigten, vorgespannten Federblättern auf die Sitzflächen gedrückt sind. Als Material für die Dichtungsplatten wird Gummi vorgeschlagen. Mit dieser Anordnung soll erreicht werden, daß sich bei Einpressen von Druckluft die einseitig befestigten Federblätter leicht aufbiegen und sich die Dichtungsplatten etwas von ihren Sitzflächen abheben, so daß die Druckluft auf drei Seiten Platz zu einem breitflächigen Einströmen hat. Der Nachteil dieser Anordnung besteht darin, daß die Druckluft nicht nach allen Seiten gleichmäßig einströmen kann. Darüberhinaus können die Drucklufteinlässe lediglich - mit obiger Einschränkung - ein Freiblasen bewirken, allerdings kein Rütteln.It has therefore been proposed in DE-B-22 62 082 to allow compressed air lines to flow into seating surfaces for sealing plates made of a soft material, which are pressed onto the seating surfaces by preloaded spring leaves fastened on one side. As Material for the sealing plates is suggested rubber. This arrangement is intended to ensure that when the compressed air is pressed in, the spring leaves fastened on one side bend slightly and the sealing plates lift off somewhat from their seating surfaces, so that the compressed air has space on three sides for a wide-area inflow. The disadvantage of this arrangement is that the compressed air cannot flow in uniformly on all sides. In addition, the compressed air inlets can only - with the above restriction - blow free, but no shaking.

Demgegenüber sind in der DE-A-29 50 050 Austragsvorrichtungen für mit trichterförmigem Auslauf versehene Schüttgutbehälter in gestalt einer oder mehrerer vibrierender Platten vorgeschlagen worden, die einen Teil der Wandung des Trichterteils des Schüttgutbehälters bilden. Hierbei soll vorzugsweise jede vibrierende Platte von Gummidichtleisten eingefaßt, in der Wandung des Schüttgutbehälters gehalten und durch zusätzliche elastische Stützelemente abgestützt werden. Ein solches System hat zwar den Vorteil, daß keine Strömungskanäne vorgesehen sind, die verschmutzt werden können, jedoch fehlt bei der Entladung der zusätzliche Entleerungseffekt aufgrund der eingeströmten Druckluft. Außerdem mangelt es an einem Selbstreinigungseffekt, so daß mit der Zeit die Gefahr einer Verschmutzung und damit einer Einsatzminderung solcher Systeme relativ groß ist.In contrast, DE-A-29 50 050 discharge devices for bulk containers provided with a funnel-shaped outlet have been proposed in the form of one or more vibrating plates which form part of the wall of the funnel part of the bulk container. Each vibrating plate should preferably be surrounded by rubber sealing strips, held in the wall of the bulk material container and supported by additional elastic support elements. Such a system has the advantage that there are no flow channels that can be contaminated, but the additional emptying effect due to the inflowing compressed air is missing during the discharge. In addition, there is a lack of a self-cleaning effect, so that over time the risk of contamination and thus a reduction in the use of such systems is relatively great.

Aus der DE-A-38 30 448 ist ein Rückschlagventil mit einem zu seiner Ausströmöffnung hin offenen Gehäuse bekannt, bei dem die Ventilmembran nur an ihren Außenseiten eingespannt ist und bei Druckluftzufuhr sich elastisch derart aufbläht, daß im gedehnten Zustand in seiner Ebene Durchtrittsöffnungen freigegeben werden, die im druckluftunbelasteten Zustand verschlossen sind. Die Funktionsfähigkeit dieser Gummimembran hängt entscheidend davon ab, daß deren Durchtrittsöffnungen im gedehnten Zustand genügend groß sind, um eine ausreichende Druckluftmenge durchtreten zu lassen, während dieselben Durchtrittsöffnungen im druckluftunbelasteten Zustand gleichermaßen dicht verschließen sollen, daß das Schüttgutmaterial hier nicht eindringen kann. Die Verschleißanfälligkeit solcher Ventilkörper ist jedoch relativ groß.From DE-A-38 30 448 a check valve with a housing open towards its outflow opening is known, in which the valve membrane is clamped only on its outer sides and, when compressed air is supplied, expands elastically in such a way that in its stretched state, through-openings are opened in its plane, which are closed in the unloaded state. The functionality of this rubber membrane depends crucially on the fact that its through openings in the stretched state are sufficiently large to allow a sufficient amount of compressed air to pass through, while the same through openings in the unloaded state should also seal tightly so that the bulk material material cannot penetrate here. However, such valve bodies are relatively susceptible to wear.

Aus der DE-A-32 04 065, der dem ersten Teil des Anspruchs 1 entspricht, ist bereits ein Drucklufteinlaßrückschlagventil bekannt zur Anordnung in oder an einer Auslaßtrichterwand eines Silobehälters für trokkenes, insbesondere pulverförmiges Schüttgut, mit einem elastischen Dichtungskörper, der von einem Halteorgan in seinem an der Einlaßmündung eines angeflanschten Druckluftzufuhrstutzens angeordneten Sitz gedrückt und der bei steigendem Luftdruck an der Einlaßmündung bis zu einer Freigabe einer sich zwischen dem Dichtungskörper und dem Sitz entstehenden Luftaustrittsöffnung elastisch verformbar ist, wobei der elastische Dichtungskörper ein hauben- oder hutförmiges Hohlprofil mit einer zum Druckluftzufuhrstutzen offenen Seite aufweist, wobei dessen stirnseitige Ringflächen im druckluftunbelasteten Zustand satt auf dem Sitz aufliegt und der elastische Dichtungskörper mit einem koaxialen Teil seiner Hohlprofilaußenwand an einem äußeren Stützkörper anliegt, der lösbar an der Auslaßtrichterwand befestigt ist. Diese Ausgestaltung ist jedoch nicht geeignet, schon bei geringem Luftdruck zu öffnen, da zur Gewährleistung der Funktion der Dichtungskörper vom äußeren Stützkörper weitgehend übergriffen werden muß, um die Stabilität und einen sicheren Verschluß bei fehlender Druckluftzufuhr zu gewähren.From DE-A-32 04 065, which corresponds to the first part of claim 1, a compressed air inlet check valve is already known for arrangement in or on an outlet funnel wall of a silo container for dry, in particular powdery bulk material, with an elastic sealing body which is held by a holding member in his seat arranged at the inlet mouth of a flanged compressed air supply nozzle is pressed and which, with increasing air pressure at the inlet mouth, is elastically deformable until a release of an air outlet opening that arises between the sealing body and the seat, the elastic sealing body being a hood-shaped or hat-shaped hollow profile with a compressed air supply nozzle has open side, the end face of the annular surfaces in the compressed air-free state lies snugly on the seat and the elastic sealing body with a coaxial part of its hollow profile outer wall on an outer Support body rests, which is releasably attached to the outlet funnel wall. However, this configuration is not suitable for opening even at low air pressure, since to ensure the function of the sealing body, the outer support body must largely overlap in order to ensure stability and a secure closure in the absence of compressed air supply.

Es ist daher Aufgabe der vorliegenden Erfindung, das gattungsgemäße Drucklufteinlaßrückschlagventil der eingangs genannten Art derart weiterzubilden, daß dieses einfach aufgebaut und leicht auswechselbar ist, wobei im Betriebszustand eine Druckluftabgabe nach allen Seiten parallel zur Behälterwandfläche möglich ist und zusätzlich ein Rütteln bewirkt wird, wobei eine bessere Dichtigkeit des Ventils bewirkt werden soll, wenn keine Druckluft zugeführt wird und trotzdem nur ein geringer Luftdruck aufgegeben werden muß, um eine Luftzufuhr zu erreichen.It is therefore an object of the present invention to further develop the generic compressed air inlet check valve of the type mentioned at the outset in such a way that it is simple in construction and easy to replace, wherein in the operating state it is possible to release compressed air in all directions parallel to the container wall surface and additionally to shake it, a better one Tightness of the valve is to be brought about when no compressed air is supplied and nevertheless only a low air pressure has to be applied in order to achieve an air supply.

Diese Aufgabe wird durch das im Anspruch 1 angegebene Drucklufteinlaßrückschlagventil gelöst.This object is achieved by the compressed air inlet check valve specified in claim 1.

Bei der erfindungsgemäße Ausgestaltung ist die Ringfläche des Dichtungskörpers kragen- oder krempenförmig ausgebildet, womit eine bessere Dichtigkeit des Ventils bewirkt wird, wenn keine Druckluft zugeführt ist.In the embodiment according to the invention, the annular surface of the sealing body is collar-shaped or brim-shaped, which results in better sealing of the valve if no compressed air is supplied.

Zum einfachen Aufbau des erfindungsgemäßen Drucklufteinlaßrückschlagventils werden der äußere und der innere Stützkörper von einem koaxialen Bolzen zentriert gehalten, der lösbar mit der Auslaßtrichterwand verbunden ist. Dabei wird der innere Stützkörper von einer Feder mit Druck beaufschlagt, die sich an der Rohprofilaußenwand abstützt.For simple construction of the compressed air inlet check valve according to the invention, the outer and the inner support body are held centered by a coaxial bolt which is detachably connected to the outlet funnel wall. The inner support body is pressurized by a spring, which is supported on the raw profile outer wall.

Die Vorteile dieses Ventils bestehen in seinem einfachen Aufbau, dem leichten Ein- und Ausbau sowie darin, daß nur ein geringer Luftdruck aufgegeben werden muß, um eine ausreichende Druckluftzufuhr an der Behälterinnenseite zu bewirken.The advantages of this valve are its simple construction, easy installation and removal, and the fact that only a small air pressure has to be applied in order to bring about an adequate supply of compressed air on the inside of the container.

Vorzugsweise weist der Bolzen an seinem dem Druckluftzufuhrstutzen zugekehrten Ende eine Querbohrung zur Aufnahme eines Querbolzens auf, der über einen im Luftzufuhrstutzen angeordneten Bajonettverschluß lösbar gehalten wird. Hierdurch wird eine feste, aber lösbare Verbindung des Stützkörpers bzw. der Stützkörper zu der Auslaßtrichterwand geschaffen.At its end facing the compressed air supply nozzle, the bolt preferably has a transverse bore for receiving a transverse bolt, which extends over one in the air supply nozzle Arranged bayonet lock is held releasably. This creates a firm but detachable connection of the support body or the support body to the outlet funnel wall.

Nach einer weiteren Ausgestaltung ist zur konstruktiven Vereinfachung die Feder eine über den genannten Bolzen gestülpte und ihn umgreifende Spiralfeder. Insbesondere soll der Bolzen gegen die Federkraft linear und in normaler Richtung zur Auslaßtrichterwandfläche bewegbar und derart drehbar sein, daß der Querbolzen aus dem Bajonettverschluß entriegelbar ist. Durch Druck auf den Bolzen gegen die Federkraft und entsprechende Verdrehung des Querbolzens kann der Stütz- und der Dichtungskörper leicht zu Reinigungszwecken entnommen werden.According to a further embodiment, to simplify the design, the spring is a spiral spring which is placed over the bolt and engages around it. In particular, the bolt should be linearly movable against the spring force and in the normal direction to the outlet funnel wall surface and be rotatable in such a way that the cross bolt can be unlocked from the bayonet catch. By pressing the bolt against the spring force and turning the cross bolt accordingly, the supporting and sealing bodies can be easily removed for cleaning purposes.

Vorzugsweise besteht der Dichtungskörper aus Kunststoff wie Silikonkautschuk, Naturkautschuk oder NBR (Acrylnitril-Butadien-Copolymerisat). In Verbindung mit der hut- oder haubenförmigen Hohlprofilgestaltung bietet der elastische Dichtungskörper somit eine 100 %ige Sicherheit gegen einen Rückfluß des staubförmigen Materials. Darüber hinaus kann dieser Dichtungskörper nicht nur für einen allseitigen Druckluftzufluß, sondern auch für einen Rütteleffekt sorgen.The sealing body is preferably made of plastic, such as silicone rubber, natural rubber or NBR (acrylonitrile-butadiene copolymer). In conjunction with the hat-shaped or hood-shaped hollow profile design, the elastic sealing body thus offers 100% security against backflow of the dust-like material. In addition, this sealing body can not only ensure an all-round inflow of compressed air, but also a vibrating effect.

In der Praxis dürfte es ausreichend sein, wenn an einem Silobehälter drei bis fünf der genannten Drucklufteinlaßrückschlagventile angeordnet sind, die vorzugsweise über eine Ringleitung miteinander verbunden werden, so daß nur eine Druckluftquelle benötigt wird.In practice, it should be sufficient if three to five of the aforementioned compressed air inlet check valves are arranged on a silo container, which are preferably connected to one another via a ring line, so that only one compressed air source is required.

Hierzu reicht ggf. ein kleinerer Kompressor.A smaller compressor may be sufficient for this.

Die Erfindung wird anhand eines konkreten Ausführungsbeispiels im folgenden näher erläutert. Es zeigen

Fig. 1
in einer schematischen, teilweise geschnittenen Darstellung ein in eine Auslaßtrichterwand eingebautes Drucklufteinlaßrückschlagventil, und
Fig. 2
eine Explosionszeichnung der Teile dieses Ventils.
The invention is explained in more detail below on the basis of a specific exemplary embodiment. Show it
Fig. 1
in a schematic, partially sectioned illustration of a compressed air inlet check valve installed in an outlet funnel wall, and
Fig. 2
an exploded view of the parts of this valve.

In eine Auslaßtrichterwand 11 eines nicht dargestellten Silobehälters mündet bei 12a ein Luftzufuhrstutzen 12, der mit dem erfindungsgemäßen Drucklufteinlaßrückschlagventil 10 versehen ist. Die wesentlichen Teile dieses Drucklufteinlaßrückschlagventils 10 einschließlich seiner Befestigung sind der fest mit dem Luftzufuhrstutzen 12 verbundene Bajonettverschluß 13 mit einer Arretierungsmöglichkeit über eine Ausnehmung 13b für einen Querbolzen 14, der durch eine Querbohrung 15 des Bolzens 16 zur Zentrierung und Halterung des inneren Stützkörpers 17, des elastischen Dichtungskörpers 18 und des äußeren Stützkörpers 19 dient. Der elastische Dichtungskörper 18 besitzt außen ein Kegelstumpfprofil und ist als Hohlkörper mit nur einer zum Luftzufuhrstutzen 12 offenen Seite ausgebildet. Dieser Dichtungskörper 18 hat ferner noch einen Kragen 18a bzw. eine außen umlaufende Randwulst, der bzw. die satt auf der Innenfläche 11a der Auslaßtrichterwand 11 aufliegt.At 12a, an air supply nozzle 12, which is provided with the compressed air inlet check valve 10 according to the invention, opens into an outlet funnel wall 11 of a silo container (not shown). The essential parts of this compressed air inlet check valve 10, including its attachment, are the bayonet lock 13, which is fixedly connected to the air supply connector 12, and can be locked by means of a recess 13b for a cross bolt 14, which is provided through a transverse bore 15 in the bolt 16 for centering and holding the inner support body 17, the elastic one Sealing body 18 and the outer support body 19 is used. The elastic sealing body 18 has a truncated cone profile on the outside and is designed as a hollow body with only one side open to the air supply nozzle 12. This sealing body 18 also has a collar 18a or an outer circumferential bead which fits snugly on the inner surface 11a of the outlet funnel wall 11.

Der äußere Stützkörper 19 weist ebenfalls ein hauben- oder hutförmiges Hohlprofil und auf seiner Innenseite eine der Außenkontur des Dichtungskörpers 18 entsprechende Ausformung auf, wobei der Stützkörper 19 auf einem oberen Teil 18b der Außenwand des Dichtungskörpers 18 mit einem koaxialen Bereich seiner Innenseite aufliegt. Ein weiterer, innerer Stützkörper 17 weist ebenfalls ein hauben- oder hutförmiges Hohlprofil auf und ist in seiner Außenkontur der Innenseite des Dichtungskörpers 18 so angepaßt, daß der Dichtungskörper 18 mit einem oberen Teil 18c seiner Hohlprofilinnenwand auf einem koaxialen Bereich der Außenkante des Stützkörpers 17 aufliegt.The outer support body 19 also has a hood-shaped or hat-shaped hollow profile and on its inside a shape corresponding to the outer contour of the sealing body 18, the support body 19 resting on an upper part 18b of the outer wall of the sealing body 18 with a coaxial region of its inside. Another, inner support body 17 also has a hood-shaped or hat-shaped hollow profile and is adapted in its outer contour to the inside of the sealing body 18 such that the sealing body 18 rests with an upper part 18c of its hollow profile inner wall on a coaxial region of the outer edge of the supporting body 17.

Die Anordnung ist daher so, daß der äußere Stützkörper 19 und der innere Stützkörper 17 zusammen den Dichtungskörper 18 beidseitig teilweise, und zwar in seinem oberen, von der Auslaßtrichterwand 11 beabstandeten Bereich einschließen und daß der freie, von den Stützkörpern 17,19 nicht eingefaßte Bereich 18 d mit seinem Außenrand auf der Auslaßtrichterwand 11 aufliegt. Die weiteren Bestandteile werden anhand der Schilderung des Zusammenbaues einzeln erläutert.The arrangement is therefore such that the outer support body 19 and the inner support body 17 together partially enclose the sealing body 18 on both sides, namely in its upper region spaced from the outlet funnel wall 11 and that the free region which is not bordered by the support bodies 17, 19 18 d rests with its outer edge on the outlet funnel wall 11. The other components are explained individually using the description of the assembly.

Zunächst wird der Querbolzen 14 in die Querbohrung 15 gesteckt, anschließend werden der Reihe nach eine erste Unterlegscheibe 10, eine Schraubenfeder 21 und eine obere Unterlegscheibe 22 über den Bolzen 16 geschoben, bevor die jeweils koaxiale Bohrungen 117,118,119 besitzenden Körper 17 bis 19 in der Reihenfolge innerer Stützkörper 17, Dichtungskörper 18 und äußerer Stützkörper 19 aufgeschoben bzw. aufgedreht werden. Im dargestellten Fall besitzt der Bolzen 16 an seinem der Querbohrung 15 entgegengesetzten Ende ein Außengewinde 116, das mit einem entsprechenden Innengewinde 123 in der Bohrung 119 eines Aufsatzteils 23 des oberen Stützkörpers 19 verschraubt werden kann. Das Aufsatzteil 23 kann jedoch auch eine getrennte überwurfmutter sein. Nach Zusammenbau der genannten Bestandteile werden die Bolzen 14 und 16 in den Bajonettverschluß eingeführt, wobei die Unterlegscheibe 20 und die Unterlegscheibe 22, die sich auf der Innenfläche 11a bzw. an dem Stützkörper 17 abstützen, jeweils als Angriffsflächen für die Feder 21 dienen. Nach Einführen des Querbolzens 14 in die vorgesehene öffnung des Bajonettverschlusses 13, die als Langloch 13a mit der Breite des Bolzens 14 und mit einer mittigen Durchstecköffnung für den Bolzen 16 ausgebildet ist (siehe Detail A) , und Hindurchstecken des Querbolzens 14 wird die Feder 21 durch Druck auf den Bolzen 16 zunächst weiter kompremiert, um ein Verdrehen des Bolzens 14 um beispielsweise 90° in die Ausnehmung 13b mit der Anlagekante 13c zu ermöglichen. Nach entsprechender Drehung des Bolzens 15 wird der Bolzen 16 druckentlastet, so daß sich der Bolzen 14 an die Anlagekante 13c anlegt und gegen Verdrehung gesichert ist, werden durch die Kraft der Feder 21 bedingt der äußere und der innere Stützkörper 17,19 sowie der dazwischenliegende Dichtungskörper 18 in fest vorgegebenem Abstand von der Auslaßtrichterwand 11 gehalten. Dieser Abstand ist so bemessen, daß der Kragen 18a des Dichtungskörpers 18 satt und unter leichter Vorspannung auf seinem Sitz 11a auf der Auslaßtrichterwand 11, aufliegt. Der Ausbau verläuft in umgekehrter Richtung.First, the cross bolt 14 is inserted into the cross bore 15, then a first washer 10, a coil spring 21 and an upper washer 22 are pushed in sequence over the bolt 16, before the respective coaxial bores 117, 118, 119 have bodies 17 to 19 in the order inner Support body 17, sealing body 18 and outer support body 19 are pushed or unscrewed. In the case shown, the bolt 16 has an external thread 116 at its end opposite the transverse bore 15, which has a corresponding thread Internal thread 123 can be screwed into the bore 119 of an attachment part 23 of the upper support body 19. The attachment part 23 can, however, also be a separate union nut. After assembly of the above-mentioned components, the bolts 14 and 16 are inserted into the bayonet lock, the washer 20 and the washer 22, which are supported on the inner surface 11a and on the support body 17, respectively serving as engagement surfaces for the spring 21. After inserting the cross bolt 14 into the intended opening of the bayonet lock 13, which is designed as an elongated hole 13a with the width of the bolt 14 and with a central through-opening for the bolt 16 (see detail A), and pushing the cross bolt 14 through, the spring 21 is pushed through Pressure on the bolt 16 is initially further compressed in order to allow the bolt 14 to be rotated, for example by 90 °, into the recess 13b with the contact edge 13c. After a corresponding rotation of the bolt 15, the bolt 16 is relieved of pressure, so that the bolt 14 rests against the contact edge 13c and is secured against rotation, the force of the spring 21 causes the outer and inner support bodies 17, 19 and the sealing body in between 18 held at a predetermined distance from the outlet funnel wall 11. This distance is dimensioned such that the collar 18a of the sealing body 18 fits snugly and under slight prestress on its seat 11a on the outlet funnel wall 11. The expansion is in the opposite direction.

Führt man Druckluft über den Luftzufuhrstutzen 12 ein, so wird sich in Abhängigkeit der Elastizität des Dichtungskörpers 18 dieser schließlich von seinem Sitz 11a abheben und ringförmig Luft in den Innenraum des Silobehälters ausströmen lassen. Hierbei wird der Dichtungskörper 18 in seinem nicht von den Stützkörpern 17,19 eingefaßten Bereich 18d zu Schwingungen angeregt werden, die sich noch dadurch verstärken lassen, daß die Druckluft impulsartig zugeführt wird. Dadurch kann eine zusätzliche Auflockerung des Gutes erreicht werden.If compressed air is introduced via the air supply nozzle 12, depending on the elasticity of the sealing body 18, it will finally lift off from its seat 11a and ring-shaped air into the interior of the silo container let it flow out. Here, the sealing body 18 will be excited to vibrate in its area 18d not enclosed by the support bodies 17, 19, which can be amplified by the fact that the compressed air is supplied in a pulsed manner. An additional loosening of the material can be achieved in this way.

Claims (5)

  1. Retention valve for a compressed air inlet (10) for disposition in or on an outlet hopper wall (11) of a silage bin for dry, more particularly, pulvurelent, bulk material with an elastic sealing member (18) which, by means of a ratining means, is pressed into its seating (11a) located at the inlet mouth (12a) of a flanged-on compressed air supply connection piece (12) and which, with increasing air pressure at the inlet mouth (12a), is elastically deformable up to effecting an unblocking of an air outlet aperture being produced between the sealing member (18) and the seating (11a), in which the elastic sealing member (18) possesses a hood-like or hat-like hollow section with a side that is open in the direction of the compressed air supply connection piece (12), while the front-end annular surface (18a) of the same, in the state in which it is not acted upon by compressed air, rests snugly upon the seating (11a) and the elastic sealing body (18), with a coaxial portion (18b) of its hollow section outer wall, rests against an external supporting member (19) which is detachably attached to the outlet hopper wall (11), in which a further internal supporting member (17) is provided, which rests coaxially upon a sealing member internal surface (18c) located opposite the external supporting member (19) and which, together with the external supporting member (19), partly encloses the sealing member (18) on both sides,
    characterized in that
    the annular surface (18a) of the sealing member (18) is constructed in the form of a collar, bead or brim, in that the external and the internal supporting members (17,19) are centered by means of a coaxial bolt (16) which is detachably connected to the outlet hopper wall (11) and in that the internal supporting member (17) is acted upon by the pressure of a spring (21), which is supported on the outlet hopper wall (11).
  2. Retention valve for a compressed air inlet according to Claim 1,
    characterized in that
    the bolt (16), at its end facing the compressed air supply connection piece (12), is provided with a transverse bore (15) in which a crossbolt (14) is resting which, by means of a bayonet catch (13) disposed in the compressed air supply connection piece (12), is detachably retained.
  3. Retention valve for a compressed air inlet according to Claim 1 or 2,
    characterized in that
    the spring is a helical spring (21) placed upside down over the bolt (16) and embraces the same.
  4. Retention valve for a compressed air inlet according to either Claim 2 or 3,
    characterized in that
    the bolt (16) is linearily displaceable and rotatable against the force of the spring, while the crossbolt (14) is releasable from the bayonet catch (13).
  5. Retention valve for a compressed air inlet according to any of Claims 1 to 4,
    characterized in that
    the sealing member (18) is comprised of plastic, by preference silicon rubber, natural rubber or NBR (acrylonitrile-butadiene copolymerisate).
EP91118206A 1990-11-14 1991-10-25 Retention valve for compressed air inlet Expired - Lifetime EP0485781B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9015587U DE9015587U1 (en) 1990-11-14 1990-11-14 Compressed air inlet check valve
DE9015587U 1990-11-14

Publications (2)

Publication Number Publication Date
EP0485781A1 EP0485781A1 (en) 1992-05-20
EP0485781B1 true EP0485781B1 (en) 1993-08-25

Family

ID=6859346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118206A Expired - Lifetime EP0485781B1 (en) 1990-11-14 1991-10-25 Retention valve for compressed air inlet

Country Status (4)

Country Link
EP (1) EP0485781B1 (en)
AT (1) ATE93478T1 (en)
DE (2) DE9015587U1 (en)
DK (1) DK0485781T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9015587U1 (en) * 1990-11-14 1991-01-31 Feldbinder & Beckmann oHG, 2090 Winsen Compressed air inlet check valve
DE19905591B4 (en) * 1999-02-11 2006-07-13 Richard Kisilowski Device for containers and silos

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1909219C3 (en) * 1969-02-24 1978-11-02 Fendt, Wolfgang, Dr., 8032 Graefelfing Pneumatic device for discharging products from bulk material containers
DE2262082B2 (en) * 1972-12-19 1981-06-04 Gebr. Knauf Westdeutsche Gipswerke, 8715 Iphofen Construction material silo with a conical outlet part
DE2315870B2 (en) * 1973-03-30 1975-10-02 Walter Alfmeier Kg, 8830 Treuchtlingen Vacuum check valve
FR2306146A1 (en) * 1975-04-02 1976-10-29 Union Ind Entreprise FLUIDIFICATION PROCESS AND APPARATUS
DE2950050A1 (en) * 1979-12-13 1981-07-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Bulk material container outlet funnel - has rigid vibratory plates forming part of funnel wall, with individually adjustable vibrators
DE3204065A1 (en) * 1982-02-06 1983-08-25 Adolf 6960 Osterburken Lesk Pneumatic discharge aid for containers of bulk products
GB2130183A (en) * 1982-11-12 1984-05-31 Durham & Sons Limited R Discharging pulverous material from containers
DE3302657A1 (en) * 1983-01-27 1984-08-02 Rheinische Kalksteinwerke GmbH, 5603 Wülfrath VESSEL CONVEYOR FOR THE PNEUMATIC CONVEYING OF SCHUETTGUT FROM A STORAGE SILO
NZ207993A (en) * 1984-04-30 1986-09-10 J J Hutt Lift-type check valve for use as diffuser valve in hopper
US4662543A (en) * 1985-09-23 1987-05-05 Solimar Keith F Aeration device for assisting in aeration of material from containers
DE3830448A1 (en) * 1988-09-07 1990-03-15 Kaessbohrer Fahrzeug Karl Non-return valve
DE9015587U1 (en) * 1990-11-14 1991-01-31 Feldbinder & Beckmann oHG, 2090 Winsen Compressed air inlet check valve

Also Published As

Publication number Publication date
ATE93478T1 (en) 1993-09-15
DE59100327D1 (en) 1993-09-30
EP0485781A1 (en) 1992-05-20
DK0485781T3 (en) 1994-01-03
DE9015587U1 (en) 1991-01-31

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