EP1485309B1 - Valve - Google Patents

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Publication number
EP1485309B1
EP1485309B1 EP03704462A EP03704462A EP1485309B1 EP 1485309 B1 EP1485309 B1 EP 1485309B1 EP 03704462 A EP03704462 A EP 03704462A EP 03704462 A EP03704462 A EP 03704462A EP 1485309 B1 EP1485309 B1 EP 1485309B1
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EP
European Patent Office
Prior art keywords
valve
sealing
disk
sealing element
valve according
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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.)
Expired - Lifetime
Application number
EP03704462A
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German (de)
French (fr)
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EP1485309A1 (en
Inventor
Mathias Pauls
Torsten Kellner
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Rathor AG
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Rathor AG
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Publication of EP1485309A1 publication Critical patent/EP1485309A1/en
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Publication of EP1485309B1 publication Critical patent/EP1485309B1/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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B65D83/48—Lift valves, e.g. operated by push action

Definitions

  • the invention relates to a valve, in particular for discharging foaming agents from pressure vessels, which closes the pressure vessel to the outside and having an outlet opening with a moving light arranged closure member which is fixed by a spring tongue, which is positively and / or non-positively on the inside of a valve disk , Is held in closed position and releases an external outlet for an outlet opening for existing in the pressure vessel foaming agent, wherein the valve is mounted on a valve cover designed as a container lid.
  • Assembly foams especially polyurethane foams, have found a wide field of application in the art. They are used in the construction sector for fastening elements such as door frames and other prefabricated parts, for closing openings and for filling cavities and bags. They are often used for thermal and acoustic insulation. Furthermore, they are suitable to avoid the formation of condensation in subsequent cavities with subsequent corrosion. For the same reasons, the automotive industry is increasingly using mounting foams.
  • the one-component polyurethane foams frequently used for foaming are formed from the prepolymer contained in the pressure vessel by the action of moisture, in particular of atmospheric moisture. After release of the mixture of blowing agent and foaming agent, a reaction takes place between the prepolymer and the moisture contained in the air. This leads to the formation of permanent Foam. Depending on the moisture content of the air curing takes place in more or less short time. At high humidity curing only takes a few minutes. The same applies to silane-terminated polyurethane foams. 1.5K and two-component foams additionally contain a separate crosslinker component in the pressure cell.
  • valves that release by tilting or pushing the path of the foam.
  • they must ensure a secure seal during transport and storage. If the seal is insufficient, moisture diffuses into the valve mechanism so that the prepolymers in the valve harden and interfere with its proper functioning. In extreme cases, the valve is completely blocked by the polymer formed therein.
  • valves which are arranged in the head or dome part of such a pressure vessel and held by a rubber seal. By tilting the valve tube or stem, the foam between the rubber seal and the end plate of the hollow tube can occur in designated cutouts in the tube wall in the tube and thereby escape from the pressure vessel.
  • tilt valves Although these tilt valves have a relatively good sealing mechanism, the tilting motion required to release the prepolymer-blowing agent mixture is generally felt to be a disadvantage.
  • the targeted spreading of the mounting foam is complicated by the fact that the outflow direction of the mixture changes by the tilting movement.
  • the tilting mechanism is poorly suited to use mechanical dispensing aids, such as spray guns. Since the valve tube can rotate in the seal, it tries to avoid the tilting movement by turning.
  • valve closure element is connected via a coil spring with a holding part as an abutment.
  • the holding part protrudes freely into the interior of the pressure vessel.
  • the spring is inserted between the holding part and valve closure element and ensures its tight fit on the valve disk. Holding part and spring are full of Mission65den media accessible.
  • This mixture of propellant and prepolymer leaves the pressure vessel during actuation of the valve closure element and thereby reaches into the region of the spring and its holding part.
  • the pressure on the valve closure element is released, this is again pressed by the spring against the valve disk, so that no more mixture can escape. Mixture, which is still in the valve chamber, is discharged by the blowing agent content.
  • poppet valves with spring mechanism are well suited for connection to spray guns. But they have the disadvantage that the function of the spring is sooner or later affected or even blocked because moisture diffuses into the valve mechanism and causes polymer formation. This means that the pressure vessel either can not be emptied regulated discharged or leaking and uncontrollably bleeds.
  • sealing portions are provided on the circumference of the valve closure element. These have at least one elastically deformable, disc-shaped portion which projects radially from the closure element and engages under deformation to the valve seat. Sealing and closure elements are made of one piece and therefore of the same material. For the deformation of these elements require a certain elasticity, on the other hand limits the contact forces and reduces the tightness.
  • Out DE 196 18 375 A1 is a valve with external coil spring known.
  • valve type with a spring tongue fixed on the valve disk as a restoring element goes off US 5,927,563 at the same time, this valve type still requires an elastic valve body, in which the closure element (Ausbringrohr) made of a rigid material is fitted.
  • the valve body itself is injection-molded onto the valve disk and at the same time serves as a sealing seat in its lower region for a sealing plate arranged below the closure element.
  • valves have quite a complex structure with a variety of details, including a rigid valve body that must be mounted or molded on the valve plate. For cost reasons, a simple structure with a reduction of the individual parts would be desirable.
  • the object of the invention is therefore to provide a valve which avoids the disadvantages of conventional valves described above. It is intended to protect against the ingress of moisture into the valve area located in the pressure vessel. Nevertheless, application aids, such as spray guns, must be able to be connected. It should be simple and ensure high reliability.
  • the invention proposes, starting from the valve of the type mentioned above, that the valve disk is designed as a valve guide for the closure part, wherein the valve guide is in a cylindrical extension of the valve disk and the valve disk has a sealing surface formed as a valve seat, with a The sealing element cooperates, wherein the valve disk and the sealing element made of rigid, not functionally conditionally deformable material, and the sealing effect is brought about by an elastic element arranged on the valve disk.
  • the valve allows proper connection of the pressure vessel to a spray gun of conventional design. Since the Ventilvärschlußelement moves through a valve stem in the direction of the pressure vessel axis, it can no longer affect the function by turning off.
  • valve closure element does not require elastically deformable details for the seal, it may as well as the valve disc made of rigid material.
  • the valve disk also offers the necessary strength from its uniform function as a cover for the pressure vessel and at the same time as a rigid valve body in order to absorb the contact forces on the valve seat surfaces.
  • a further preferred solution provides to connect a leaf spring as an elastic spring element fixed to the valve disk on its side facing the pressure vessel. In this position, they have contact with the outflowing fluid, which, however, has no contact with media that cause it to harden. In addition, they are fluidically in an area on the valve closure element, where a medium flows past rather. This situation is favored by the fact that no holding part for this spring element can lead to turbulent flow behavior in the critical area. Gluing or blocking is thus excluded. In addition, leaf springs offer less or no starting points / surfaces for gluing by the foaming agent.
  • Fig.1 shows a section through a non-inventive valve, but is suitable to explain individual aspects of the invention.
  • the valve disk 1, 2 fulfills the functions as a container lid and as a valve body. For this purpose, it has a central opening 3 for the passage of the movable valve closure element 4, 5, valve seat surfaces 6 parallel to the correspondingly engaging sealing surfaces 7 on the valve closure element and a valve stem 8 for guiding the valve closure element.
  • the valve stem serves as a sliding surface for the pressed between the two parts 4, 5 of the valve closure member seal 16.
  • With its outer diameter of the valve stem also acts as a spring guide for a coil spring 9, from below on a paragraph 10 of larger diameter engages remote from the pressure vessel part 4 of the valve closure element. In this way, the spring forces in their relaxed position pull and hold the movable valve element 4, 5 in the required position for closing against the valve seat.
  • the two parts 4, 5 of the movable valve element are screwed in this version, for example via a thread 15.
  • an O-ring 16 is pressed as a sealing element so that it rests sealingly on the valve stem 8.
  • an elastomeric disk 17 is proposed to be applied for sealing.
  • the seal against a spray gun, as shown here, also take place by an O-ring 18.
  • the two parts of the valve disk 1, 2 can be welded, glued, molded or directly, as in Fig. 2 shown to be deep-drawn from one piece.
  • the side facing away from the pressure vessel not shown edge 19 of the valve disk is flared for attachment to the same.
  • Fig. 2 shows a section through a valve according to the invention, with the basis of the Fig. 1 represented valve matches in some essential features.
  • the valve disk 1, 2 with its two functions as a lid for the pressure vessel and valve body is deep-drawn from one piece here.
  • a reinforcing element 20 may be introduced.
  • Another difference to the valve Fig. 1 is the leaf spring 21, which is attached to the pressure vessel side facing the valve disc 1, 2.
  • the spring force brings and holds the movable valve element 3, 4 as a compressive force in the closed position.
  • the externally applied pressure in the center of the compression spring made of resilient material in a width appropriate for the valve closure element tongue 22 is pressed into the interior of the pressure cell. This will make the page A of the Fig. 2 illustrated annular opening 11 between the valve seat 6 and the sealing surface 7 on the valve closure element for the escape of the medium free.
  • Fig. 3 shows a further preferred embodiment of the invention, which is based on the fact that the valve disk 1 at the same time serves as a valve body or guide 8 for the closure member 4 and with its portion 6 as a valve seat for the sealing element. 7
  • the valve disk 1 is flanged in a manner already described in its edge region 9, 10 for fixing to the dome of the pressure box.
  • the valve disk has a folded inner structure which ends in a tubular upwardly curved guide element 8.
  • Within the guide part 8 of the stem 4 is mounted, which has a groove mounted in a ring seal 18 in its upper region.
  • the ring seal is used to seal the system when connected to a conventional spray gun (connecting elements not shown).
  • the actual sealing mechanism is based on the interaction of the horizontal portion 6 of the valve disk 1 (valve seat 6), which is followed by the underlying elastic element 17 in the form of a perforated sealing disc.
  • the closure member 4 (Stem) is guided.
  • the horizontally projecting edge 31 of a spring element 30 which holds the valve in the closed position. Sealing disk 17 and edge 31 are crimped tight at 32 in a fold of the valve disk 1 and completely circumferentially with each other.
  • the spring element 30 has at its lower end a leaf spring or spring tongue 21, which presses the sealing element 7 against the sealing disk 17 and thereby brings about the sealing effect of the valve.
  • Pins 33 of the sealing element 7 engage on the underside in the stem 4, so that there is a tight fit.
  • the stem 4 additionally has one or more transverse bores 13 through which foaming agents can penetrate and exit through the channel extending therein. Stem 4 and sealing element 7 together form the closure part. 4
  • the valve itself is actuated by the depression of the closure member 4.
  • the pressure is transmitted via the sealing element 7 to the spring tongue 21, which yields and releases an annular gap at 11, through which the foaming agent can enter into the interior of the sealing element 7.
  • the spring element 30 itself is not suitable to keep the foaming agent from the sealing element 7; it has one or more openings through which the foaming agent can pass freely.
  • Figure 4 shows a sectional view of another preferred valve design in which the elastic member 17 is extended to seal to a resilient and dense guide member 16 in a sectional view with mutually offset cutting planes.
  • the closure element 4 is embodied here in one piece, ie it comprises both the stem and the sealing element 7 in one component.
  • a central channel 14 is open by lateral openings 13 in the lower region to the outside, so that the openings 13 when moving the stem 4 down into the pressure box, free.
  • the valve disk 1 itself has a substantially horizontally extending region 6 as a valve seat, against which the elastic element 17 acts, and a vertically extending guide region 8, which engages in a recess of the elastic body 16.
  • the elastic body 16 itself is made of rubber or rubber, for example, and constitutes a cylindrical hollow body, which is cut in the region of the guide 8. He has a substantially smooth inner surface which seals against the outer wall of the stem 4 and 4 leads in the operation of the valve by pressing the stem.
  • the sealing area or the sealing element 7 of the closure part 4 is held in the closed position via the spring tongue 21 of a spring element 30, d. H. a radially extending projection of the sealing element 7 presses against the lower edge of the elastic element 17, which in turn is supported against the valve seat part 6 of the valve disk 1.
  • the spring element 30 is positively locked in this case in an S-shaped structure of the valve disk 1 (at 32).
  • the illustrated operation makes it possible to produce the valve in a simple manner in that first in the valve plate 1 of the elastic body 16 is inserted, in which subsequently the stem 4 is introduced with the sealing element 7 from below. Subsequently, the spring element 30 is latched from below into the S-shaped segment 32 of the valve disk 1 and held there positively and non-positively.
  • Fig. 5 shows a further embodiment of the valve according to the invention with the stem 4, which forms the closure member together with the sealing element 7 and the valve disk 1, which again with a guide 8 and a valve seat portion 6, against which the sealing element 7 acts via a sealing washer 17, is trained.
  • the stem 4 has in its lower region a transverse opening of the wall 13, can enter through the foaming agent in the vertical channel 14 of the stem 4.
  • a located in a groove O-ring 18 serves as a seal against a connectable in the upper region of the stem 4 gun adapter.
  • the sealing disk 17 is crimped with the valve disk 1.
  • a basket 38 is crimped together with a rim 39 with the sealing disc 17, wherein the basket 38 has openings 37, can enter through the foaming agent.
  • the spring element 30 is inserted in the bottom region, whose spring tongue 21 projects upwards and acts against the sealing element 7.
  • the basket 38 has on its inside perpendicularly extending webs 3, 4, which cooperate with a likewise perpendicular edge portion 36 of the sealing element 7 such that the sealing element 7 is guided on the basket 38.
  • the invention related spring elements are made of conventional spring steel.
  • the sealing elements 7 can be designed both as metallic deep-drawn parts, as well as precision molded plastic parts.
  • the basket 38, as in Fig. 5 shown, is preferably made of plastic.
  • Fig. 5a shows a perspective sectional view of the embodiment of Fig. 5 from which the interaction of the individual components becomes clear.
  • FIG. 6 illustrates a variant of the embodiment according to Fig. 5 in which the sealing disc 17 is integrated in a sealing body 16.
  • valve disk 1 with a valve seat part 6 and a guide tube 8 sits a sealing body 16, which is widened in its lower region radially to a sealing washer 17.
  • the sealing body 16 has in its upper region a projection on or in the central region a recess in the region of the guide part 8 of the valve disk 1.
  • the seated on the end of the guide tube 8 of the valve disk 1 part of the body 16 is elastically formed so that it Pressure can escape to the outside.
  • the stem 4 of the valve which forms the closure part together with the sealing element 7, extends.
  • a radial projection in the upper region rests on the end of the sealing body 16.
  • the stem 4 terminates in a bottom part 39, which is fitted in the bowl-shaped or trough-shaped sealing element 7.
  • a circumferential radial projection 40 bears sealingly against the sealing disk 17.
  • the side openings 13 have the shape of a triangle standing on the tip, so that when impressing the Stems 4 a very accurate dosage of the discharge amount of foaming agent is possible.
  • the area of the apertures 13 which is freed up and thus the delivery capacity of the valve increases.
  • the spring element 30 positively and non-positively fitted with its flanged ends 31 in an S-shaped structure 32 of the valve disk 1.
  • a spring tongue 21 protrudes upward and presses against the bottom of the sealing element 7, which seals with its upper edge against the radial expansion 17 of the sealing body 16. It is understood that the spring element 30 has openings or openings through which the foaming agent can freely enter the space above the spring element.
  • valves according to the invention can be used for all forms of pressure cans with foaming agents, but are primarily suitable for one-component systems.
  • the associated pressure cans are of conventional design and require no further adaptation to the particularity of these valves.
  • valve disc 1 at the same time assumes the function of existing in conventional valves rigid valve body. Therefore, in addition to the closure part, which is usually formed from the stem and the sealing element, but it can be formed both one-piece and two-piece, only an elastic element is needed, which is mounted between the valve seat and sealing element and for the actual sealing effect responsible for.
  • the elastic element is designed in particular as a sealing disk and is preferably secured by crimping, crimping or jamming on the valve disk 1 in the region of the valve seat 6.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

Valve for discharging foaming agents from pressurized containers with said valve sealing off the pressurized container to the outside and being provided with an outlet opening furnished with a closure part ( 4 ) movably arranged therein and retained in closed position by means of a spring element ( 21 ) and, when actuated externally, clearing an outlet opening for the foaming agent present in the pressurized container, said valve being mounted on a container cover designed to function as a valve disk ( 1 ), so that the valve disk ( 1 ) has a sealing face designed to act as valve seat ( 6 ) with said sealing face interacting with a sealing element ( 7 ), and the valve disk ( 1 ) and the sealing element ( 7 ) being made of a rigid, functionally non-deformable material and the sealing effect being brought about by an elastic element ( 17 ) arranged on the valve disk ( 1 ), and the spring element ( 9, 21, 30 ) that holds the sealing element ( 7 ) in closing position being directly secured to the valve disk ( 1 ).

Description

Die Erfindung betrifft ein Ventil, insbesondere zum Ausbringen von Schaumbildnern aus Druckbehältern, das den Druckbehälter nach außen hin abschließt und eine Austrittsöffnung mit einem beweglichteren angeordneten Verschlußteil aufweist, welches durch eine Federzunge, die form- und/oder kraftschlüssig an der Innenseite eines Ventiltellers festgelegt ist, in Verschlußstellung gehalten wird und durch äußere Betätigung eine Austrittsöffnung für den im Druckbehälter vorhandenen Schaumbildner freigibt, wobei das Ventil an einem als Ventilteller ausgebildeten Behälterdeckel gelagert ist.The invention relates to a valve, in particular for discharging foaming agents from pressure vessels, which closes the pressure vessel to the outside and having an outlet opening with a moving light arranged closure member which is fixed by a spring tongue, which is positively and / or non-positively on the inside of a valve disk , Is held in closed position and releases an external outlet for an outlet opening for existing in the pressure vessel foaming agent, wherein the valve is mounted on a valve cover designed as a container lid.

Montageschäume, insbesondere Polyurethanschäume, haben in der Technik ein großes Anwendungsgebiet gefunden. Sie dienen im Baubereich zur Befestigung von Elementen wie Türzargen und anderen Fertigteilen, zum Schließen von Öffnungen und zum Ausschäumen von Hohlräumen und taschen. Sie werden vielfach zur Wärme- und Schalldämmung eingesetzt. Ferner sind sie geeignet, in damit gefüllten Hohlräumen die Schwitzwasserbildung mit nachfolgender Korrosion zu vermeiden. Aus den selben Gründen setzt auch der Automobilbau in zunehmenden Umfang Montageschäume ein.Assembly foams, especially polyurethane foams, have found a wide field of application in the art. They are used in the construction sector for fastening elements such as door frames and other prefabricated parts, for closing openings and for filling cavities and bags. They are often used for thermal and acoustic insulation. Furthermore, they are suitable to avoid the formation of condensation in subsequent cavities with subsequent corrosion. For the same reasons, the automotive industry is increasingly using mounting foams.

Die zum Ausschäumen häufig verwendeten Einkomponenten-Polyurethanschäume bilden sich aus dem im Druckbehälter enthaltenen Prepolymer durch die Einwirkung von Feuchtigkeit, insbesondere von Luftfeuchtigkeit. Nach der Freisetzung des Gemisches aus Treibmittel und Schaumbildner findet eine Reaktion zwischen dem Prepolymer und der in der Luft enthaltenen Feuchtigkeit statt. Das führt zur Bildung des dauerhaften Schaums. Je nach Feuchtigkeitsgehalt der Luft erfolgt die Aushärtung in mehr oder weniger kurzer Zeit. Bei hoher Luftfeuchtigkeit benötigt die Härtung nur wenige Minuten. Entsprechendes gilt für silanterminierte Polyurethanschäume. 1,5K- und Zweikomponentenschäume enthalten in der Druckdose zusätzlich eine separate Vernetzerkomponente.The one-component polyurethane foams frequently used for foaming are formed from the prepolymer contained in the pressure vessel by the action of moisture, in particular of atmospheric moisture. After release of the mixture of blowing agent and foaming agent, a reaction takes place between the prepolymer and the moisture contained in the air. This leads to the formation of permanent Foam. Depending on the moisture content of the air curing takes place in more or less short time. At high humidity curing only takes a few minutes. The same applies to silane-terminated polyurethane foams. 1.5K and two-component foams additionally contain a separate crosslinker component in the pressure cell.

Zum Ausbringen oder Austragen des Schaums dienen Spezialventile, die durch Kippen oder Eindrücken den Weg des Schaums freigeben. Während des Transports und der Zwischenlagerung müssen sie hingegen für eine sichere Abdichtung sorgen. Falls die Abdichtung nicht ausreicht, diffundiert Feuchtigkeit in den Ventilmechanismus ein, so daß die Prepolymere im Ventil aushärten und dessen einwandfreie Funktion beeinträchtigen. Im Extremfall wird das Ventil durch das darin gebildete Polymer vollständig blockiert.To discharge or discharge the foam are special valves that release by tilting or pushing the path of the foam. On the other hand, they must ensure a secure seal during transport and storage. If the seal is insufficient, moisture diffuses into the valve mechanism so that the prepolymers in the valve harden and interfere with its proper functioning. In extreme cases, the valve is completely blocked by the polymer formed therein.

Es sind Spezialventile bekannt, die im Kopf- oder Domteil eines solchen Druckbehälters angeordnet und über eine Gummidichtung gehalten sind. Durch Schrägstellen des Ventilrohres oder Stems kann der Schaum zwischen Gummidichtung und Abschlussplatte des Hohlröhrchens in dafür vorgesehene Ausschnitte in der Rohrwandung in das Röhrchen eintreten und dadurch aus dem Druckbehälter austreten.There are known special valves which are arranged in the head or dome part of such a pressure vessel and held by a rubber seal. By tilting the valve tube or stem, the foam between the rubber seal and the end plate of the hollow tube can occur in designated cutouts in the tube wall in the tube and thereby escape from the pressure vessel.

Obwohl diese Kippventile einen relativ guten Dichtmechanismus aufweisen, wird die zum Freisetzen des Prepolymer-Treibmittel-Gemisches erforderliche Kippbewegung allgemein als Nachteil empfunden. Das gezielte Ausbringen des Montageschaums wird dadurch erschwert, daß sich die Ausströmrichtung des Gemisches durch die Kippbewegung ändert. Ferner ist der Kippmechanismus wenig geeignet, um mechanische Ausbringhilfen, wie Spritzpistolen, einzusetzen. Da sich das Ventilrohr in der Dichtung drehen kann, versucht es der Kippbewegung durch Drehen auszuweichen.Although these tilt valves have a relatively good sealing mechanism, the tilting motion required to release the prepolymer-blowing agent mixture is generally felt to be a disadvantage. The targeted spreading of the mounting foam is complicated by the fact that the outflow direction of the mixture changes by the tilting movement. Furthermore, the tilting mechanism is poorly suited to use mechanical dispensing aids, such as spray guns. Since the valve tube can rotate in the seal, it tries to avoid the tilting movement by turning.

Bekannt sind ferner Tellerventile, in denen das Ventilverschlußelement über eine Schraubenfeder mit einem Halteteil als Widerlager verbunden ist. Das Halteteil ragt frei in den Innenraum des Druckbehälters. Die Feder ist zwischen Halteteil und Ventilverschlußelement eingesetzt und stellt dessen festen Sitz am Ventilteller sicher. Halteteil und Feder sind für die auszubringenden Medien voll zugänglich. Dieses Gemisch aus Treibmittel und Prepolymer verlässt beim Betätigen des Ventilverschlußelements den Druckbehälter und gelangt dabei in den Bereich der Feder und ihres Halteteils. Bei Nachlassen des Drucks auf das Ventilverschlußelement wird dieses von der Feder wieder gegen den Ventilteller gepresst, so daß kein weiteres Gemisch mehr austreten kann. Gemisch, das sich noch im Ventilraum befindet, wird durch den Treibmittelgehalt ausgetragen.Also known are poppet valves in which the valve closure element is connected via a coil spring with a holding part as an abutment. The holding part protrudes freely into the interior of the pressure vessel. The spring is inserted between the holding part and valve closure element and ensures its tight fit on the valve disk. Holding part and spring are full of auszubringenden media accessible. This mixture of propellant and prepolymer leaves the pressure vessel during actuation of the valve closure element and thereby reaches into the region of the spring and its holding part. When the pressure on the valve closure element is released, this is again pressed by the spring against the valve disk, so that no more mixture can escape. Mixture, which is still in the valve chamber, is discharged by the blowing agent content.

Derartige Tellerventile mit Federmechanismus eignen sich gut für den Anschluss an Spritzpistolen. Sie haben aber den Nachteil, daß die Funktion der Feder über kurz oder lang beeinträchtigt wird oder sogar blockiert, weil Feuchtigkeit in den Ventilmechanismus eindiffundiert und eine Polymerbildung verursacht. Dies führt dazu, daß der Druckbehälter entweder nicht mehr geregelt entleert werden kann oder undicht wird und unkontrolliert abbläst.Such poppet valves with spring mechanism are well suited for connection to spray guns. But they have the disadvantage that the function of the spring is sooner or later affected or even blocked because moisture diffuses into the valve mechanism and causes polymer formation. This means that the pressure vessel either can not be emptied regulated discharged or leaking and uncontrollably bleeds.

Bei einer weiteren Version dieser Ventile sind am Umfang des Ventilverschlußelements Dichtungsabschnitten vorgesehen. Diese weisen mindestens einen elastisch verformbaren, scheibenförmigen Abschnitt auf, der radial vom Verschlusselement absteht und sich unter Verformung an den Ventilsitz anlegt. Dicht- und Verschlusselemente sind aus einem Guss und folglich aus ein und demselben Material. Für die Verformung benötigen diese Elemente eine gewisse Elastizität, die andererseits die Anpresskräfte eingrenzt und die Dichtigkeit mindert.In a further version of these valves sealing portions are provided on the circumference of the valve closure element. These have at least one elastically deformable, disc-shaped portion which projects radially from the closure element and engages under deformation to the valve seat. Sealing and closure elements are made of one piece and therefore of the same material. For the deformation of these elements require a certain elasticity, on the other hand limits the contact forces and reduces the tightness.

Aus DE 196 18 375 A1 ist ein Ventil mit außen liegender Schraubenfeder bekannt.Out DE 196 18 375 A1 is a valve with external coil spring known.

Ein Ventiltyp mit einer am Ventilteller festgelegten Federzunge als Rückstellelement geht aus US 5 927 563 hervor, wobei dieser Ventiltyp gleichzeitig noch eines elastischen Ventilkörpers bedarf, in den das Verschlusselement (Ausbringrohr) aus einem starren Material eingepasst ist. Der Ventilkörper selbst ist an den Ventilteller angespritzt und dient zugleich in seinem unteren Bereich als Dichtsitz für einen unterhalb des Verschlusselements angeordneten Dichtteller.A valve type with a spring tongue fixed on the valve disk as a restoring element goes off US 5,927,563 at the same time, this valve type still requires an elastic valve body, in which the closure element (Ausbringrohr) made of a rigid material is fitted. The valve body itself is injection-molded onto the valve disk and at the same time serves as a sealing seat in its lower region for a sealing plate arranged below the closure element.

Alle diese Ventile haben einen recht aufwendigen Aufbau mit einer Vielzahl von Einzelheiten, darunter einen starren Ventilkörper, der am Ventilteller montiert oder angespritzt werden muß. Aus Kostengründen wäre ein einfacher Aufbau mit einer Reduktion der Einzelteile wünschenswert.All of these valves have quite a complex structure with a variety of details, including a rigid valve body that must be mounted or molded on the valve plate. For cost reasons, a simple structure with a reduction of the individual parts would be desirable.

Aufgabe der Erfindung ist deshalb, ein Ventil zu schaffen, welches die zuvor beschriebenen Nachteile herkömmlicher Ventile vermeidet. Es soll gegen das Eindringen von Feuchtigkeit in den im Druckbehälter liegenden Ventilbereich schützen. Dennoch müssen Ausbringhilfen, wie Spritzpistolen, angeschlossen werden können. Es soll einfach aufgebaut sein und hohe Betriebssicherheit gewährleisten.The object of the invention is therefore to provide a valve which avoids the disadvantages of conventional valves described above. It is intended to protect against the ingress of moisture into the valve area located in the pressure vessel. Nevertheless, application aids, such as spray guns, must be able to be connected. It should be simple and ensure high reliability.

Zur Lösung dieser Aufgabe schlägt die Erfindung ausgehend vom Ventil der eingangs genannten Art vor, dass der Ventilteller als Ventilführung für das Verschlussteil ausgebildet ist, wobei die Ventilführung in einer zylindrischen Verlängerung des Ventiltellers besteht und der Ventilteller eine als Ventilsitz ausgebildete Dichtfläche aufweist, die mit einem Dichtelement zusammenwirkt, wobei der Ventilteller und das Dichtelement aus starrem, nicht funktionell bedingt verformbarem Material bestehen, und die Dichtwirkung durch ein am Ventilteller angeordnetes elastisches Element herbeigeführt wird.To achieve this object, the invention proposes, starting from the valve of the type mentioned above, that the valve disk is designed as a valve guide for the closure part, wherein the valve guide is in a cylindrical extension of the valve disk and the valve disk has a sealing surface formed as a valve seat, with a The sealing element cooperates, wherein the valve disk and the sealing element made of rigid, not functionally conditionally deformable material, and the sealing effect is brought about by an elastic element arranged on the valve disk.

Das Ventil ermöglicht-den einwandfreien Anschluss des Druckbehälters an eine Spritzpistole herkömmlicher Bauart. Da sich das Ventilvärschlußelement durch einen Ventilschaft in Richtung der Druckbehälterachse bewegt, kann es die Funktion nicht mehr durch Abdrehen beeinträchtigen.The valve allows proper connection of the pressure vessel to a spray gun of conventional design. Since the Ventilvärschlußelement moves through a valve stem in the direction of the pressure vessel axis, it can no longer affect the function by turning off.

Dadurch, daß das Ventilverschlußelement keine elastisch verformbaren Details für die Dichtung benötigt, kann es ebenso wie der Ventilteller aus starrem Material bestehen. So ist es möglich, die für die Dichtung erforderlichen Anpresskräfte ausreichend zu dimensionieren und über entsprechende Federkräfte zu übertragen. Die Dichtungsfuhktion wird von separaten elastischen Elementen übernommen, die für diese Aufgabe ausgefegt sind und sich hierfür bewährt haben. Andererseits bietet auch der Ventilteller aus seiner einheitlichen Funktion als Deckel für den Druckbehälter und gleichzeitig als starrer Ventilkörper die nötige Festigkeit, um die Anpresskräfte an den Ventilsitzflächen aufzufangen.The fact that the valve closure element does not require elastically deformable details for the seal, it may as well as the valve disc made of rigid material. Thus, it is possible to sufficiently dimension the contact forces required for the seal and to transmit them via corresponding spring forces. The sealing action is taken over by separate elastic elements, which have been designed for this task and have proven themselves for this purpose. On the other hand, the valve disk also offers the necessary strength from its uniform function as a cover for the pressure vessel and at the same time as a rigid valve body in order to absorb the contact forces on the valve seat surfaces.

Eine weitere bevorzugte Lösung sieht vor, eine Blattfeder als elastisches Federelement fest mit dem Ventilteller auf seiner dem Druckbehälter zugewandten Seite zu verbinden. Sie haben in dieser Position zwar Kontakt mit dem ausströmenden Fluid, das aber hier keinen Kontakt mit Medien hat, die zum Aushärten führen. Außerdem liegen sie strömungstechnisch in einem Bereich am Ventilverschlußelement an, an dem ein Medium eher vorbeiströmt. Diese Situation wird dadurch begünstigt, daß kein Halteteil für dieses Federelement zu turbulentem Strömungsverhalten im kritischen Bereich führen kann. Ein Verkleben oder Verblocken ist somit ausgeschlossen. Zudem bieten Blattfedern weniger oder keine Ansatzpunkte/-flächen für das Verkleben durch den Schaumbildner.A further preferred solution provides to connect a leaf spring as an elastic spring element fixed to the valve disk on its side facing the pressure vessel. In this position, they have contact with the outflowing fluid, which, however, has no contact with media that cause it to harden. In addition, they are fluidically in an area on the valve closure element, where a medium flows past rather. This situation is favored by the fact that no holding part for this spring element can lead to turbulent flow behavior in the critical area. Gluing or blocking is thus excluded. In addition, leaf springs offer less or no starting points / surfaces for gluing by the foaming agent.

Weitere bevorzugte Ausführungsformen der Erfindung sind Gegenstand der Unteransprüche, auf die anhand der beigefügten Abbildungen näher eingegangen wird. Es versteht sich, daß die in den bevorzugten Ausführungsformen der Erfindung dargestellten bzw. beschriebenen Merkmale und Ausbildungen nicht nur in der gezeigten Kombination von Bedeutung sind, sondern in jedweder sinnvollen Kombination und Gestaltungsmöglichkeit, die sich aus der Gesamtheit der Darstellungen und der hier gelieferten Beschreibung ergeben. Von den Abbildungen zeigen

Fig. 1
einen Schnitt durch ein Ventil mit einem zweiteiligen Ventilverschlußelement und einer im Ventilteller auf der vom Druckbehälter abgewandten Seite angeordneten Schraubenfeder, (fällt nicht unter die Erfindung)
Fig. 2
einen Schnitt durch ein Ventil mit einem zweiteiligen Ventilverschlußelement und einer am Ventilteller auf der Seite des Druckbehälters angebrachten Blatt- bzw. Scheibenfeder,
Fig. 3
einen Schnitt durch ein Ventil mit einem einteiligen Ventilverschfußteil und am Ventilteller auf der Seite des Druckbehälters angebrachten Kombination aus Feder- und Dichtelement;
Fig.4
eine Schnittdarsteiiupg einer weiteren bevorzugten Ventilausführung, bei der das elastische Element zur Dichtung zu einem elastischen und dichtenden Führungselement erweitert ist;
Fig.5
eine Variante der Ausführungsform von Fig. 3; und
Fig. 5a
eine perspektivische Schnittdarstellung der Ausführungsform von Fig. 5;
Fig. 6
ein erfindungsgemäßes Ventil mit einem von einer Blattfeder gehaltenen separaten Dichtelement.
Further preferred embodiments of the invention are the subject of the dependent claims, which will be discussed in more detail with reference to the accompanying drawings. It will be understood that the features and configurations illustrated and described in the preferred embodiments of the invention are not only important in the combination shown, but in any useful combination and design possibilities arising from the entirety of the illustrations and the description provided herein , Show from the pictures
Fig. 1
a section through a valve with a two-part valve closure element and arranged in the valve plate on the side facing away from the pressure vessel side coil spring, (does not fall under the invention)
Fig. 2
a section through a valve with a two-part valve closure element and attached to the valve plate on the side of the pressure vessel leaf or disc spring,
Fig. 3
a section through a valve with a one-piece Ventilverschfußteil and the valve plate on the side of the pressure vessel mounted combination of spring and sealing element;
Figure 4
a Schnittdarsteiiupg another preferred valve design, in which the elastic element is extended to the seal to an elastic and sealing guide member;
Figure 5
a variant of the embodiment of Fig. 3 ; and
Fig. 5a
a perspective sectional view of the embodiment of Fig. 5 ;
Fig. 6
an inventive valve with a held by a leaf spring separate sealing element.

Fig.1 zeigt einen Schnitt durch ein nicht enfindungsgemäßes Ventil, ist jedoch geeignet, einzelne Aspekte der Erfindung zu erläutern. Der Ventilteller 1, 2 erfüllt die Funktionen als Behälterdeckel und als Ventilkörper. Dazu weist er eine zentrale Öffnung 3 zur Durchführung des beweglichen Ventilverschlußelements 4, 5, Ventilsitzflächen 6 parallel zu den entsprechend eingreifenden Dichtflächen 7 am Ventilverschlußelement und einen Ventilschaft 8 zur Führung des Ventilverschlußelements. An seinem inneren Durchmesser dient der Ventilschaft als Gleitfläche für die zwischen den beiden Teilen 4, 5 des Ventilverschlußelements eingepreßte Dichtung 16. Mit seinem äußeren Durchmesser wirkt der Ventilschaft außerdem als Federführung für eine Schraubenfeder 9, die von unten an einem Absatz 10 mit größerem Durchmesser des vom Druckbehälter abgewandten Teils 4 des Ventilverschlußelements angreift. Auf diese Weise ziehen und halten die Federkräfte in ihrer entspannten Stellung das bewegliche Ventilelement 4, 5 in die zum Verschließen erforderliche Stellung gegen den Ventilsitz. Fig.1 shows a section through a non-inventive valve, but is suitable to explain individual aspects of the invention. The valve disk 1, 2 fulfills the functions as a container lid and as a valve body. For this purpose, it has a central opening 3 for the passage of the movable valve closure element 4, 5, valve seat surfaces 6 parallel to the correspondingly engaging sealing surfaces 7 on the valve closure element and a valve stem 8 for guiding the valve closure element. At its inner diameter, the valve stem serves as a sliding surface for the pressed between the two parts 4, 5 of the valve closure member seal 16. With its outer diameter of the valve stem also acts as a spring guide for a coil spring 9, from below on a paragraph 10 of larger diameter engages remote from the pressure vessel part 4 of the valve closure element. In this way, the spring forces in their relaxed position pull and hold the movable valve element 4, 5 in the required position for closing against the valve seat.

Zum Öffnen muß von außen auf das bewegliche Ventilelement 4, 5 eine Druckkraft aufgebracht werden, die der Federkraft entgegenwirkt. In diesem Fall wird ein ringförmiger Spalt 11 zwischen dem Ventilsitz 6 und der Dichtfläche 7 am Ventilverschlußelement 4, 5 frei. Durch diesen kann das Medium aus dem Druckbehälter durch die innerhalb des Ventilverschlußelements und oberhalb seiner Dichtfläche eingebrachten Kanäle 12, 13, 14 und von dort in oder auf die anvisierten Bauteile oder durch eine nicht dargestellte Spritzpistole austreten. Die Seite A der Abb. zeigt die geöffnete, die Seite B die geschlossene Position des beweglichen Ventilelements.To open a compressive force must be applied externally to the movable valve element 4, 5, which counteracts the spring force. In this case, an annular gap 11 between the valve seat 6 and the sealing surface 7 on the valve closure element 4, 5 is released. Through this, the medium from the pressure vessel through the introduced within the valve closure member and above its sealing surface channels 12, 13, 14 and from there into or on the targeted components or escape through a spray gun, not shown. The side A of the Fig. Shows the open, the side B the closed position of the movable valve member.

Die beiden Teile 4, 5 des beweglichen Ventilelements sind bei dieser Version beispielsweise über ein Gewinde 15 verschraubt. Dabei wird ein O-Ring 16 als Dichtelement so verpresst, daß er an dem Ventilschaft 8 dichtend anliegt. Auf dem Ventilsitz 6 ist vorschlagsweise eine Elastomerscheibe 17 zum Abdichten aufgebracht. Die Dichtung gegenüber einer Spritzpistole kann, wie hier gezeigt, ebenfalls durch einen O-Ring 18 erfolgen. Die beiden Teile des Ventiltellers 1, 2 können verschweißt, verklebt, angespritzt oder direkt, wie in Fig. 2 dargestellt, aus einem Stück tiefgezogen werden. Der von dem hier nicht dargestellten Druckbehälter abgewandte Rand 19 des Ventiltellers ist für die Befestigung mit demselben abgebördelt.The two parts 4, 5 of the movable valve element are screwed in this version, for example via a thread 15. In this case, an O-ring 16 is pressed as a sealing element so that it rests sealingly on the valve stem 8. On the valve seat 6, an elastomeric disk 17 is proposed to be applied for sealing. The seal against a spray gun, as shown here, also take place by an O-ring 18. The two parts of the valve disk 1, 2 can be welded, glued, molded or directly, as in Fig. 2 shown to be deep-drawn from one piece. The side facing away from the pressure vessel not shown edge 19 of the valve disk is flared for attachment to the same.

Fig. 2 zeigt einen Schnitt durch ein erfindungsgemäßes Ventil, das mit dem anhand der Fig. 1 dargestellten Ventil in einigen wesentlichen Merkmalen übereinstimmt. Der Ventilteller 1, 2 mit seinen beiden Funktionen als Deckel für den Druckbehälter und Ventilkörper ist hier aus einem Stück tiefgezogen. Zur Aussteifung kann, um die Dicke des Tiefziehmaterials in Grenzen zu halten, wie hier gezeigt, ein Verstärkungselement 20 eingebracht werden. Ein weiterer Unterschied zum Ventil der Fig. 1 ist die Blattfeder 21, welche an der dem Druckbehälter zugewandten Seite des Ventiltellers 1, 2 angebracht ist. Die Federkraft bringt und hält das bewegliche Ventilelement 3, 4 als Druckkraft in Verschlußstellung. Zum Öffnen wird durch einen von außen aufgebrachten Druck die in der Mitte der Druckfeder aus federndem Material in einer für das Ventilverschlußelement angemessenen Breite ausgearbeitete Zunge 22 in das Innere der Druckdose gedrückt. Dadurch wird die auf der Seite A der Abb. 2 dargestellte ringförmige Öffnung 11 zwischen Ventilsitz 6 und der Dichtfläche 7 am Ventilverschlußelement zum Austreten des Mediums frei. Fig. 2 shows a section through a valve according to the invention, with the basis of the Fig. 1 represented valve matches in some essential features. The valve disk 1, 2 with its two functions as a lid for the pressure vessel and valve body is deep-drawn from one piece here. For stiffening, in order to limit the thickness of the thermoforming material, as shown here, a reinforcing element 20 may be introduced. Another difference to the valve Fig. 1 is the leaf spring 21, which is attached to the pressure vessel side facing the valve disc 1, 2. The spring force brings and holds the movable valve element 3, 4 as a compressive force in the closed position. For opening, the externally applied pressure in the center of the compression spring made of resilient material in a width appropriate for the valve closure element tongue 22 is pressed into the interior of the pressure cell. This will make the page A of the Fig. 2 illustrated annular opening 11 between the valve seat 6 and the sealing surface 7 on the valve closure element for the escape of the medium free.

Fig. 3 zeigt einen weitere bevorzugte Ausführungsform der Erfindung, die darauf beruht, daß der Ventilteller 1 zugleich als Ventilkörper bzw. -führung 8 für das Verschlußteil 4 dient und mit seinem Abschnitt 6 als Ventilsitz für das Dichtelement 7. Fig. 3 shows a further preferred embodiment of the invention, which is based on the fact that the valve disk 1 at the same time serves as a valve body or guide 8 for the closure member 4 and with its portion 6 as a valve seat for the sealing element. 7

Der Ventilteller 1 ist auf bereits beschriebene Art und Weise in seinem Randbereich 9, 10 zur Festlegung am Dom der Druckdose umgebördelt. Der Ventilteller weist eine gefaltete Innenstruktur auf, die in einem rohrförmig aufwärtsgebogenen Führungselement 8 endet. Innerhalb des Führungsteils 8 ist der Stem 4 gelagert, das in seinem oberen Bereich eine in einer Nut gelagerte Ringdichtung 18 aufweist. Die Ringdichtung dient zur Dichtung des Systems bei Anschluß an eine übliche Spritzpistole (Anschlußelemente nicht gezeigt).The valve disk 1 is flanged in a manner already described in its edge region 9, 10 for fixing to the dome of the pressure box. The valve disk has a folded inner structure which ends in a tubular upwardly curved guide element 8. Within the guide part 8 of the stem 4 is mounted, which has a groove mounted in a ring seal 18 in its upper region. The ring seal is used to seal the system when connected to a conventional spray gun (connecting elements not shown).

Der eigentliche Dichtmechanismus beruht auf dem Zusammenwirkten des waagerechten Abschnitts 6 des Ventiltellers 1 (Ventilsitz 6), an den sich das darunterliegende elastische Element 17 in Form einer durchbrochenen Dichtscheibe anschließt. Durch die Dichtscheibe 17 ist das Verschlußteil 4 (Stem) geführt. Unmittelbar unterhalb der Dichtscheibe 17 befindet sich der waagerecht auskragende Rand 31 eines Federelements 30, das das Ventil in der Verschlußposition hält. Dichtscheibe 17 und Rand 31 sind bei 32 in einer Falte des Ventiltellers 1 dicht und vollständig umlaufend miteinander verkrimpt.The actual sealing mechanism is based on the interaction of the horizontal portion 6 of the valve disk 1 (valve seat 6), which is followed by the underlying elastic element 17 in the form of a perforated sealing disc. Through the sealing washer 17, the closure member 4 (Stem) is guided. Immediately below the sealing disc 17 is the horizontally projecting edge 31 of a spring element 30, which holds the valve in the closed position. Sealing disk 17 and edge 31 are crimped tight at 32 in a fold of the valve disk 1 and completely circumferentially with each other.

Das Federelement 30 weist an seinem unteren Ende eine Blattfeder oder Federzunge 21 auf, die das Dichtelement 7 gegen die Dichtscheibe 17 preßt und dadurch die Abschlußwirkung des Ventils herbeiführt. Zapfen 33 des Dichtelements 7 greifen an der Unterseite in den Stem 4 ein, so daß sich ein fester Sitz ergibt. Der Stem 4 weist zusätzlich eine oder mehrere querverlaufende Bohrungen 13 auf, durch die Schaumbildner eindringen und durch den darin verlaufenden Kanal austreten kann. Stem 4 und Dichtelement 7 bilden gemeinsam das Verschlußteil 4.The spring element 30 has at its lower end a leaf spring or spring tongue 21, which presses the sealing element 7 against the sealing disk 17 and thereby brings about the sealing effect of the valve. Pins 33 of the sealing element 7 engage on the underside in the stem 4, so that there is a tight fit. The stem 4 additionally has one or more transverse bores 13 through which foaming agents can penetrate and exit through the channel extending therein. Stem 4 and sealing element 7 together form the closure part. 4

Das Ventil selbst wird durch das Herabdrücken des Verschlußteils 4 betätigt. Der Druck wird über das Dichtelement 7 auf die Federzunge 21 übertragen, die nachgibt und bei 11 einen Ringspalt freigibt, durch den der Schaumbildner in den Innenraum des Dichtelements 7 eintreten kann.The valve itself is actuated by the depression of the closure member 4. The pressure is transmitted via the sealing element 7 to the spring tongue 21, which yields and releases an annular gap at 11, through which the foaming agent can enter into the interior of the sealing element 7.

Es versteht sich, daß das Federelement 30 selbst nicht geeignet ist, den Schaumbildner vom Dichtelement 7 fernzuhalten; es weist ein oder mehrere Durchbrechungen auf, durch die der Schaumbildner frei hindurchtreten kann.It is understood that the spring element 30 itself is not suitable to keep the foaming agent from the sealing element 7; it has one or more openings through which the foaming agent can pass freely.

Fig.4 zeigt eine Schnittdarstellung einer weiteren bevorzugten Ventilausführung, bei der das elastische Element 17 zur Dichtung zu einem elastischen und dichten Führungselement 16 erweitert ist, in einer Schnittdarstellung mit gegeneinander versetzten Schnittebenen. Das Verschlußelement 4 ist hier einstückig ausgeführt, d. h. es umfaßt sowohl den Stem als auch das Dichtelement 7 in einem Bauteil. Ein zentraler Kanal 14 ist durch seitliche Durchbrechungen 13 im unteren Bereich nach außen hin offen, so daß die Durchbrechungen 13 bei Verschieben des Stem 4 nach unten, in die Druckdose hinein, frei werden. Figure 4 shows a sectional view of another preferred valve design in which the elastic member 17 is extended to seal to a resilient and dense guide member 16 in a sectional view with mutually offset cutting planes. The closure element 4 is embodied here in one piece, ie it comprises both the stem and the sealing element 7 in one component. A central channel 14 is open by lateral openings 13 in the lower region to the outside, so that the openings 13 when moving the stem 4 down into the pressure box, free.

Der Ventilteller 1 selbst weist einen im wesentlichen waagerecht verlaufenden Bereich 6 als Ventilsitz auf, gegen den das elastische Element 17 wirkt, sowie einen senkrecht verlaufenden Führungsbereich 8, der in einer Ausnehmung des elastischen Körpers 16 eingreift. Der elastische Körper 16 selbst ist beispielsweise aus Gummi oder Kautschuk gefertigt und stellt einen zylinderförmigen Hohlkörper dar, der im Bereich der Führung 8 eingeschnitten ist. Er hat eine im wesentlichen glatt verlaufende innere Fläche, die gegen die äußere Wandung des Stems 4 abdichtet und bei der Betätigung des Ventils durch Eindrücken den Stem 4 führt.The valve disk 1 itself has a substantially horizontally extending region 6 as a valve seat, against which the elastic element 17 acts, and a vertically extending guide region 8, which engages in a recess of the elastic body 16. The elastic body 16 itself is made of rubber or rubber, for example, and constitutes a cylindrical hollow body, which is cut in the region of the guide 8. He has a substantially smooth inner surface which seals against the outer wall of the stem 4 and 4 leads in the operation of the valve by pressing the stem.

Der Dichtbereich oder das Dichtelement 7 des Verschlußteils 4 wird über die Federzunge 21 eines Federelements 30 in der Verschlußposition gehalten, d. h. ein radial verlaufender Vorsprung des Dichtelements 7 preßt sich gegen die untere Kante des elastischen Elements 17, das sich wiederum gegen den Ventilsitzteil 6 des Ventiltellers 1 abstützt.The sealing area or the sealing element 7 of the closure part 4 is held in the closed position via the spring tongue 21 of a spring element 30, d. H. a radially extending projection of the sealing element 7 presses against the lower edge of the elastic element 17, which in turn is supported against the valve seat part 6 of the valve disk 1.

Das Federelement 30 ist in diesem Fall formschlüssig in eine S-förmige Struktur des Ventiltellers 1 (bei 32) formschlüssig eingerastet.The spring element 30 is positively locked in this case in an S-shaped structure of the valve disk 1 (at 32).

Die dargestellte Funktionsweise ermöglicht es, das Ventil in einer einfachen Art und Weise dadurch herzustellen, daß zunächst in den Ventilteller 1 der elastische Körper 16 eingeschoben wird, in den anschließend der Stem 4 mit dem Dichtelement 7 von unten eingeführt wird. Anschließend wird das Federelement 30 von unten in das S-förmige Segment 32 des Ventiltellers 1 eingeklinkt und dort form- und kraftschlüssig festgehalten.The illustrated operation makes it possible to produce the valve in a simple manner in that first in the valve plate 1 of the elastic body 16 is inserted, in which subsequently the stem 4 is introduced with the sealing element 7 from below. Subsequently, the spring element 30 is latched from below into the S-shaped segment 32 of the valve disk 1 and held there positively and non-positively.

Fig. 5 zeigt eine weitere Ausführungsform des erfindungsgemäßen Ventils mit dem Stem 4, der zusammen mit dem Dichtelement 7 das Verschlußteil bildet und dem Ventilteller 1, der auch hier wieder mit einer Führung 8 und einem Ventilsitzabschnitt 6, gegen den das Dichtelement 7 über eine Dichtscheibe 17 wirkt, ausgebildet ist. Der Stem 4 weist in seinem unteren Bereich eine querverlaufende Durchbrechung der Wand 13 auf, durch die Schaumbildner in den senkrecht verlaufenden Kanal 14 des Stems 4 eintreten kann. Ein in einer Nut gelegener O-Ring 18 dient als Dichtung gegenüber einem im oberen Bereich des Stems 4 anschließbaren Pistolenadapters. Fig. 5 shows a further embodiment of the valve according to the invention with the stem 4, which forms the closure member together with the sealing element 7 and the valve disk 1, which again with a guide 8 and a valve seat portion 6, against which the sealing element 7 acts via a sealing washer 17, is trained. The stem 4 has in its lower region a transverse opening of the wall 13, can enter through the foaming agent in the vertical channel 14 of the stem 4. A located in a groove O-ring 18 serves as a seal against a connectable in the upper region of the stem 4 gun adapter.

Wie in Fig. 3 ist auch in dieser Ausführungsform die Dichtscheibe 17 mit dem Ventilteller 1 verkrimpt. In dieser Ausführungsform ist allerdings nicht das Federelement 30, sondern ein Korb 38 mit einem Rand 39 mit der Dichtscheibe 17 zusammen gekrimpt, wobei der Korb 38 Durchbrechungen 37 aufweist, durch die Schaumbildner eintreten kann. In dem Korb ist im Bodenbereich das Federelement 30 eingelegt, dessen Federzunge 21 nach oben ragt und gegen das Dichtelement 7 wirkt.As in Fig. 3 In this embodiment, too, the sealing disk 17 is crimped with the valve disk 1. In this embodiment, however, not the spring element 30, but a basket 38 is crimped together with a rim 39 with the sealing disc 17, wherein the basket 38 has openings 37, can enter through the foaming agent. In the basket, the spring element 30 is inserted in the bottom region, whose spring tongue 21 projects upwards and acts against the sealing element 7.

Der Korb 38 weist an seiner Innenseite senkrecht verlaufende Stege 3, 4 auf, die mit einem ebenfalls senkrecht verlaufenden Randbereich 36 des Dichtelements 7 dergestalt zusammenwirken, daß das Dichtelement 7 an dem Korb 38 geführt wird.The basket 38 has on its inside perpendicularly extending webs 3, 4, which cooperate with a likewise perpendicular edge portion 36 of the sealing element 7 such that the sealing element 7 is guided on the basket 38.

Vorzugsweise werden die erfindungsgemäß verwandten Federelemente aus üblichen Federstahl gefertigt. Die Dichtelemente 7 können sowohl als metallische Tiefziehteile ausgebildet sein, wie auch als Präzisionsformteile aus Kunststoff. Der Korb 38, wie in Fig. 5 dargestellt, wird vorzugsweise aus Kunststoff gefertigt.Preferably, the invention related spring elements are made of conventional spring steel. The sealing elements 7 can be designed both as metallic deep-drawn parts, as well as precision molded plastic parts. The basket 38, as in Fig. 5 shown, is preferably made of plastic.

Fig. 5a zeigt eine perspektivische Schnittdarstellung der Ausführungsform von Fig. 5, aus der das Zusammenwirken der einzelnen Bauteile deutlich wird. Fig. 5a shows a perspective sectional view of the embodiment of Fig. 5 from which the interaction of the individual components becomes clear.

Die Ausführungsform gemäß Fig. 6 stellt eine Variante der Ausführungsform gemäß Fig. 5 dar, bei der die Dichtscheibe 17 in einen Dichtkörper 16 integriert ist.The embodiment according to Fig. 6 illustrates a variant of the embodiment according to Fig. 5 in which the sealing disc 17 is integrated in a sealing body 16.

In den Ventilteller 1 mit einem Ventilsitzteil 6 und einem Führungsrohr 8 sitzt ein Dichtkörper 16, der in seinem unteren Bereich radial zu einer Dichtscheibe 17 erweitert ist. Der Dichtkörper 16 weist in seinem oberen Bereich einen Vorsprung auf bzw. im mittleren Bereich einen Rücksprung im Bereich des Führungsteils 8 des Ventiltellers 1. Der auf dem Ende des Führungsrohrs 8 des Ventiltellers 1 aufsitzende Teil des Körpers 16 ist elastisch so ausgebildet, daß er unter Druck nach außen hin ausweichen kann.In the valve disk 1 with a valve seat part 6 and a guide tube 8 sits a sealing body 16, which is widened in its lower region radially to a sealing washer 17. The sealing body 16 has in its upper region a projection on or in the central region a recess in the region of the guide part 8 of the valve disk 1. The seated on the end of the guide tube 8 of the valve disk 1 part of the body 16 is elastically formed so that it Pressure can escape to the outside.

Im Inneren des Dichtkörpers 16 verläuft der Stem 4 des Ventils, der zusammen mit dem Dichtelement 7 das Verschlußteil bildet. Ein radialer Vorsprung im oberen Bereich liegt auf den Ende des Dichtkörpers 16 auf. Der Stem 4 endet in einem Bodenteil 39, das in das schüssel- bzw. wannenförmige Dichtelement 7 eingepaßt ist. Ein umlaufender radialer Vorsprung 40 liegt an der Dichtscheibe 17 dichtend an.Inside the sealing body 16, the stem 4 of the valve, which forms the closure part together with the sealing element 7, extends. A radial projection in the upper region rests on the end of the sealing body 16. The stem 4 terminates in a bottom part 39, which is fitted in the bowl-shaped or trough-shaped sealing element 7. A circumferential radial projection 40 bears sealingly against the sealing disk 17.

Die seitlichen Durchbrechungen 13 haben die Form eines auf der Spitze stehenden Dreiecks, so daß bei Eindrücken des Stems 4 eine sehr genaue Dosierung der Austrittsmenge an Schaumbildner möglich ist. Zunächst wird nur der untere spitz zulaufende Bereich der Öffnungen 13 frei, was die Durch- und Austrittsmenge stark begrenzt. Bei nur teilweisem Eindrücken des Stems 4 wird nur der untere Teil des Querschnitts der Öffnungen 13 frei, so daß nur eine relativ geringe Menge Schaumbildner austreten kann. Bei weiterem bzw. vollständigem Eindrücken des Stems erhöht sich die freiwerdende Fläche der Durchbrechungen 13 und damit die Förderkapazität des Ventils.The side openings 13 have the shape of a triangle standing on the tip, so that when impressing the Stems 4 a very accurate dosage of the discharge amount of foaming agent is possible. First, only the lower tapered region of the openings 13 is free, which greatly limits the amount of flow and exit. With only partial impressions of the stem 4, only the lower part of the cross section of the openings 13 is exposed, so that only a relatively small amount of foaming agent can escape. Upon further or complete impressions of the stem, the area of the apertures 13 which is freed up and thus the delivery capacity of the valve increases.

Wie bei Fig. 4 ist auch in dieser Ausführungsform das Federelement 30 form- und kraftschlüssig mit seinem umgebördelten Enden 31 in eine S-förmige Struktur 32 des Ventiltellers 1 eingepaßt. Eine Federzunge 21 ragt aufwärts und drückt gegen den Boden des Dichtelements 7, das mit seinem oberen Rand gegen die radiale Ausweitung 17 des Dichtkörpers 16 dichtet. Es versteht sich, daß das Federelement 30 Durchbrechungen bzw. Öffnungen aufweist, durch die der Schaumbildner ungehindert in den Raum oberhalb des Federelements eintreten kann.As in Fig. 4 is in this embodiment, the spring element 30 positively and non-positively fitted with its flanged ends 31 in an S-shaped structure 32 of the valve disk 1. A spring tongue 21 protrudes upward and presses against the bottom of the sealing element 7, which seals with its upper edge against the radial expansion 17 of the sealing body 16. It is understood that the spring element 30 has openings or openings through which the foaming agent can freely enter the space above the spring element.

Die erfindungsgemäßen Ventile können für alle Formen von Druckdosen mit Schaumbildnern eingesetzt werden, sind jedoch in erster Linie für Einkomponentensysteme geeignet. Die damit einhergehenden Druckdosen sind herkömmlicher Bauart und bedürfen keiner weiteren Anpassung an die Besonderheit dieser Ventile.The valves according to the invention can be used for all forms of pressure cans with foaming agents, but are primarily suitable for one-component systems. The associated pressure cans are of conventional design and require no further adaptation to the particularity of these valves.

Es versteht sich, daß bei den erfindungsgemäßen Ventilen eine der Besonderheiten darin liegt, daß der Ventilteller 1 zugleich die Funktion des in üblichen Ventilen vorhandenen starren Ventilkörper übernimmt. Es werden deshalb neben dem Verschlußteil, das in der Regel aus dem Stem und dem Dichtelement gebildet wird, dabei aber sowohl einstückig als auch zweistückig ausgebildet sein kann, lediglich ein elastisches Element benötigt wird, das zwischen Ventilsitz und Dichtelement gelagert ist und für die eigentliche Dichtwirkung verantwortlich ist. Das elastische Element ist insbesondere als Dichtscheibe ausgebildet und wird vorzugsweise durch Verbördeln, Verkrimpen oder Verklemmen am Ventilteller 1 im Bereich des Ventilsitzes 6 gesichert.It is understood that in the valves according to the invention one of the special features is that the valve disc 1 at the same time assumes the function of existing in conventional valves rigid valve body. Therefore, in addition to the closure part, which is usually formed from the stem and the sealing element, but it can be formed both one-piece and two-piece, only an elastic element is needed, which is mounted between the valve seat and sealing element and for the actual sealing effect responsible for. The elastic element is designed in particular as a sealing disk and is preferably secured by crimping, crimping or jamming on the valve disk 1 in the region of the valve seat 6.

Claims (11)

  1. Valve for discharging foaming agents from pressurized containers with said valve sealing off the pressurized container to the outside and being provided with an outlet opening furnished with a closure part (4) movably arranged therein and retained in closed position by means of a spring tongue (21) being secured to the inside of a valve disk (1) in a form- and/or force closed manner and, when actuated externally, clearing an outlet opening for the foaming agent present in the pressurized container, said valve being mounted on a container cover designed to function as the valve disk (1), characterized in that, the valve disk (1) is designed to function as a guidance (8) for the closure part (4) and has a sealing face designed to act as valve seat (6) with said sealing face interacting with a sealing element (7), the guidance (8) consisting in a cylindrical extension of the valve disk (1), and the valve disk (1) and the sealing element (7) being made of a rigid, functionally non-deformable material and the sealing effect being brought about by an elastic element (17) arranged on the valve disk (1).
  2. The valve according to claim 1, characterized in that the spring element (30) is secured to the valve disk (1) by a crimping or clamping method.
  3. Valve according to any one of the above claims, characterized in that the elastic element (16, 17) is a sealing body or a sealing disk.
  4. The valve according to claim 3, characterized in that the sealing disk (17) is arranged between the valve seat (6) and the sealing element (7).
  5. The valve according to claim 4, characterized in that the sealing disk (17) is secured to the valve disk (1) by a crimping or clamping method.
  6. Valve according to any one of the above claims, characterized in that the closure part (4) comprises of a valve stem and the sealing element (7) and being of one- or two-component design.
  7. Valve according to any one of the above claims, characterized in that the base of the closure part (4) is enlarged radially to form the sealing element (7).
  8. The valve according to claim 6, characterized in that the sealing element (7) is a separate, molded part that acts on the valve seat (6) via the elastic element (17).
  9. The valve according to claim 8, characterized in that the sealing element (7) is a bowl-shaped, molded metallic part retained in closing position by means of a spring tongue (21) acting on the bottom.
  10. The valve according to any one of the above claims, characterized in that the closure part (4) has been provided with an inside longitudinal bore terminating in radially extending bores or ducts.
  11. The valve according to claim 10, characterized in that the apertures as per cross-sectional representation are shaped as a triangle turned upside down.
EP03704462A 2002-01-24 2003-01-24 Valve Expired - Lifetime EP1485309B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10202849 2002-01-24
DE10202849 2002-01-24
PCT/EP2003/000729 WO2003062092A1 (en) 2002-01-24 2003-01-24 Valve

Publications (2)

Publication Number Publication Date
EP1485309A1 EP1485309A1 (en) 2004-12-15
EP1485309B1 true EP1485309B1 (en) 2009-11-18

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EP03704462A Expired - Lifetime EP1485309B1 (en) 2002-01-24 2003-01-24 Valve

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US (1) US20050121476A1 (en)
EP (1) EP1485309B1 (en)
AT (1) ATE449015T1 (en)
DE (1) DE50312132D1 (en)
WO (1) WO2003062092A1 (en)

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Also Published As

Publication number Publication date
ATE449015T1 (en) 2009-12-15
WO2003062092A1 (en) 2003-07-31
EP1485309A1 (en) 2004-12-15
US20050121476A1 (en) 2005-06-09
DE50312132D1 (en) 2009-12-31

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