AT396973B

AT396973B - Pressure-reducing valve

Info

Publication number: AT396973B
Application number: AT58091A
Authority: AT
Inventors: Gerd Ing Binggl
Original assignee: Benckiser Wasser Technik Aktie
Priority date: 1991-03-14
Filing date: 1991-03-14
Publication date: 1994-01-25
Also published as: ATA58091A

Abstract

Pressure-reducing valve with a tubular valve housing 1, a valve cover 2 and a valve device 3 which has a valve spring 34 and a valve tappet 32 which is axially displaceable relative to a valve seat 31 counter to the action of the valve spring 34 by means of a diaphragm 35, the diaphragm 35 being situated in an annular space 19 which is connected to the fluid-flow tube 12 via a pressure transmission passage 17, 18 opening downstream of the valve seat 31, thereby allowing the valve tappet 32 to be controlled by the pressure prevailing beyond the valve seat 31. In this arrangement, the axis of the valve device 3 encloses an angle of 30 degree to 70 degree, preferably an angle of about 40 degree to 60 degree, with the axis of the valve housing 1. <IMAGE>

Description

AT 396 973 B ·AT 396 973 B

Die gegenständliche Erfindung betrifft ein Druckminderventil mit einem rohrförmigen Ventilgehäuse, einer Ventilabdeckung und einer Ventileinrichtung, welche eine Ventilfeder und einen Ventilstößel, welcher mittels einer Membran entgegen der Wirkung der Ventilfeder gegenüber einem Ventilsitz axial verstellbar ist, aufweist, wobei sich die Membran in einem Ringraum befindet, der über einen in Strömungsrichtung nach 5 dem Ventilsitz mündenden Druckübertragungskanal mit dem Durchflußrohr verbunden ist, wodurch der Ventilstößel durch den hinter dem Ventilsitz herrschenden Druck steuerbar ist.The present invention relates to a pressure reducing valve with a tubular valve housing, a valve cover and a valve device, which has a valve spring and a valve tappet, which is axially adjustable by means of a membrane against the action of the valve spring relative to a valve seat, the membrane being located in an annular space , which is connected to the flow tube via a pressure transmission channel opening into the valve seat in the direction of flow according to FIG. 5, as a result of which the valve tappet can be controlled by the pressure prevailing behind the valve seat.

Bei bekannten derartigen Druckminderventilen ragt die Ventilabdeckung, innerhalb welcher sich die Ventilfeder befindet, vom rohrförmigen Ventilgehäuse etwa in einem rechten Winkel ab. Hieraus ergibt sich bei gegebener axialer Länge der Ventileinrichtung eine bestimmte Bauhöhe des Druckminderventils. Da weiters 10 die Achse der Ventileinrichtung mit der Achse des Ventilgehäuses und damit auch mit der Richtung des dieses durchströmenden Mediums einen rechten Winkel einschließt, erfolgt eine mehrfache Umlenkung des das Ventil durchströmenden Mediums, wodurch Druckverluste und Geräuschentwicklungen bedingt werden.In known pressure reducing valves of this type, the valve cover, within which the valve spring is located, projects from the tubular valve housing at approximately a right angle. For a given axial length of the valve device, this results in a certain overall height of the pressure reducing valve. Furthermore, since the axis of the valve device forms a right angle with the axis of the valve housing and therefore also with the direction of the medium flowing through it, the medium flowing through the valve is deflected several times, as a result of which pressure losses and noise developments are caused.

Der gegenständlichen Erfindung liegt demnach die Aufgabe zugrunde, ein Druckminderventil zu schaffen, durch welches die dem bekannten Stand der Technik anhaftenden Nachteile vermieden werden, welches also bei 15 vorgegebener axialer Länge der Ventileinrichtung eine verminderte Bauhöhe aufweist, bei welchem die Druckverluste vermindert werden und bei welchem die Geräuschentwicklung herabgesetzt wird.The object of the present invention is therefore to provide a pressure reducing valve by which the disadvantages inherent in the known prior art are avoided, which therefore has a reduced overall height for a given axial length of the valve device, in which the pressure losses are reduced and in which the noise level is reduced.

Wie dies z. B, aus der FR-PS 2 246 785 ersichtlich ist, ist es bei Regelventilen bekannt, die Achse der Ventileinrichtung gegenüber der Achse des Ventilgehäuses in einem spitzen Winkel von etwa 45° anzuordnen. Regelventile unterscheiden sich jedoch insofeme in sehr maßgeblicher Weise von Druckminderventilen, als bei 20 letzteren eine Membrane vorgesehen ist, welche mit dem Ventilstößel dahingehend zusammenwirkt, daß der im Durchflußrohr hinter dem Ventilsitz auftretende Druck an die Membrane übertragen wird. Hierdurch erfolgt insofeme eine Steuerung des Ventils, als bei einem Ansteigen des Druckes hinter dem Ventilsitz das Ventil geschlossen wird, worauf der Druck absinkt, wodurch das Ventil wieder geöffnet wird.How this z. B, from which FR-PS 2 246 785 can be seen, it is known for control valves to arrange the axis of the valve device relative to the axis of the valve housing at an acute angle of approximately 45 °. Control valves differ, however, in a very significant way from pressure reducing valves, as in 20 the latter a membrane is provided which interacts with the valve tappet in such a way that the pressure occurring in the flow tube behind the valve seat is transmitted to the membrane. This results in control of the valve in that when the pressure behind the valve seat rises, the valve closes, whereupon the pressure drops, causing the valve to be opened again.

Die vorstehend bei Druckminderventilen gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß die 25 Achse der Ventileinrichtung mit der Achse des Ventilgehäuses einen Winkel von 30° bis 70°, vorzugsweise einen Winkel von etwa 40° bis 60°, einschließt. Durch diese Ausbildung des Druckminderventils wird dessen Bauhöhe herabgesetzt. Weiters werden die Druckverluste sowie die Strömungsgeräusche vermindert. Zudem wird die konstruktive Gestaltung des Ventilgehäuses vereinfacht und werden insbesondere die innerhalb desselben befindlichen Kanäle verkürzt. Hierdurch wird es ermöglicht, die Mündung des 30 Druckübertragungskanals nahe dem Ventilsitz anzuordnen, wodurch gewährleistet ist, daß exakt derjenige Druck, welcher beim Ventilsitz aufiritt, zur Steuerung des Ventiles dient Demgegenüber befindet sich bei den bekannten Druckminderventilen, bei welchen der Ventilstößel im Winkel von 90° zum Strömungskanal steht die Mündung des Kanals vom Ventilsitz weiter entfernt wodurch Obersteuerungen des Ventils bedingt werden. 35 Vorzugsweise schließt die Achse der Ventileinrichtung mit der Achse des Ventilgehäuses einen Winkel von etwa 50° ein. Weiters befindet sich vorzugsweise der Ventilsitz in Fortsetzung der lichten Öffnung des Ventilgehäuses. Dabei kann im Ventilgehäuse eine Ringfläche angeordnet sein, welche zur Aufnahme des Ventilsitzes dient und deren Normalachse mit der Achse des Ventilgehäuses einen Winkel von 30° bis 70° einschließt. Der Ventilsitz kann als Ring ausgebildet sein, welcher in die innerhalb des Ventilgehäuses 40 befindliche Ringfiäche eingeschraübt und äbgedichtet ist. Vorzugsweise ist dieser ringförmige Ventilsitz vom Ventilstößel durchsetzt. Nach einer weiters bevorzugten Ausführungsform ist an der Innenwand des Ventilgehäuses eine Ausnehmung vorgesehen, in welcher das freie Ende des Ventilstößels geführt ist.The object set above for pressure reducing valves is achieved according to the invention in that the 25 axis of the valve device includes an angle of 30 ° to 70 °, preferably an angle of approximately 40 ° to 60 °, with the axis of the valve housing. This design of the pressure reducing valve reduces its overall height. Furthermore, the pressure losses and the flow noise are reduced. In addition, the structural design of the valve housing is simplified and in particular the channels located within it are shortened. This makes it possible to arrange the mouth of the pressure transmission channel near the valve seat, which ensures that exactly the pressure that occurs at the valve seat is used to control the valve.On the other hand, in the known pressure reducing valves, the valve tappet is at an angle of 90 ° to the flow channel, the mouth of the channel is further away from the valve seat, which means that the valve is subject to upper controls. 35 The axis of the valve device preferably forms an angle of approximately 50 ° with the axis of the valve housing. Furthermore, the valve seat is preferably in continuation of the clear opening of the valve housing. In this case, an annular surface can be arranged in the valve housing, which serves to receive the valve seat and whose normal axis includes an angle of 30 ° to 70 ° with the axis of the valve housing. The valve seat can be designed as a ring, which is screwed into the ring surface located within the valve housing 40 and sealed. This annular valve seat is preferably penetrated by the valve tappet. According to a further preferred embodiment, a recess is provided on the inner wall of the valve housing, in which the free end of the valve tappet is guided.

Der Gegenstand der Erfindung ist nachstehend anhand von zwei in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigen: 45 Fig. 1 ein Druckminderventil in axialem Schnitt undThe object of the invention is explained in more detail below with reference to two exemplary embodiments shown in the drawing. 1 shows a pressure reducing valve in axial section and

Fig. 2 ein mit einem Schutzfilter ausgebildetes Druckminderventil, gleichfalls in axialem Schnitt.Fig. 2 is a pressure reducing valve formed with a protective filter, also in axial section.

Das in Fig. 1 dargestellte Druckminderventil besteht aus einem iohrförmigen Ventilgehäuse (1), welches zwischen zwei Anschlußstutzen (11) und (12) abgedichtet eingesetzt ist Das Ventilgehäuse (1) ist mit einem Ansatz (13) ausgebildet, welcher einen Ringflansch (14) aufweist, in welchen eine rohrförmige 50 Ventiläbdeckung (2) eingeschraubt ist. Innerhalb des Ventilgehäuses (1) und der Ventilabdeckung (2) befindet sich eine Ventileinrichtung (3), welche ein Membrangehäuse (30), einen ringförmigen Ventilsitz (31), einen diesen durchsetzenden Ventilstößel (32), einen vom Ventilstößel (32) getragenen Ventilkörper (33), eine Ventilfeder (34) und eine Membrane (35) aufweist. Der Ventileinrichtung (3) ist ein Manometer (40) zugeordnet. 55 Das Ventilgehäuse (1) ist in seinem Innenraum mit einer zu dessen Längsachse schräg liegenden Ringfläche (15) ausgebildet, welche sich etwa innerhalb des lichten Raumes des Ventilgehäuses (1) befindet und in welche der Ventilsitz (31) abgedichtet eingeschraubt ist. Weiters befindet sich an der dem Ringflansch (15) gegenüber liegenden Wandung des Ventilgehäuses (1) eine Ausnehmung (16), in welche das freie Ende des Ventilstößels (32) einragt und in dieser geführt ist. Im Gehäuseansatz (13) sind weiters Kanäle (17) und (18) vorgesehen, 60 welche zu einem unterhalb der Membran (35) liegenden Ringraum (19) führen.The pressure reducing valve shown in Fig. 1 consists of an tubular valve housing (1), which is inserted between two connecting pieces (11) and (12) in a sealed manner. The valve housing (1) is designed with an extension (13) which has an annular flange (14). has, in which a tubular 50 valve cover (2) is screwed. Inside the valve housing (1) and the valve cover (2) there is a valve device (3) which has a membrane housing (30), an annular valve seat (31), a valve tappet (32) passing through it, and a valve body carried by the valve tappet (32) (33), a valve spring (34) and a membrane (35). A manometer (40) is assigned to the valve device (3). 55 The valve housing (1) is formed in its interior with an annular surface (15) lying obliquely to its longitudinal axis, which is located approximately within the clear space of the valve housing (1) and into which the valve seat (31) is screwed in a sealed manner. Furthermore, there is a recess (16) on the wall of the valve housing (1) opposite the annular flange (15), into which the free end of the valve tappet (32) projects and is guided therein. In the housing extension (13) there are also channels (17) and (18) 60 which lead to an annular space (19) lying below the membrane (35).

Die Achse der Ventileinrichtung (3) und damit die Achse der Ventilabdeckung (2), des Membrangehäuses (30), des Ringflansches (15), des Ventilsitzes (31) und des Ventilstößels (32) schließen mit der Achse des -2-The axis of the valve device (3) and thus the axis of the valve cover (2), the membrane housing (30), the ring flange (15), the valve seat (31) and the valve tappet (32) close with the axis of the -2-

Claims

AT396973B valve housing (1) an angle of about 50 °. The tension of the valve spring (34) can be adjusted by means of a spindle (36) which can be rotated by a handle (37). The connecting piece (12) or the adjoining interior of the valve housing (1) is connected to the annular space (19) via the bores (17) and (18). Due to the pressure prevailing in the annular space (19), the valve device (3) is held in its closed position against the action of the valve spring (34), in which the valve body (33) bears against the valve seat (31). If, on the other hand, this pressure, which is indicated by the manometer (40), drops under the pressure force of the valve spring (34) so that it comes into effect, the valve tappet (32) is moved downwards, as a result of which the valve body (33) is removed from the valve seat ( 31) is lifted off. As a result, medium, such as a liquid, steam or gas, can flow from the connecting piece (11) through the adjoining part of the valve housing (1), through-holes in the membrane housing (30) and through the annular valve seat (31) into the right-hand area of the valve housing (1 ) flow into the connecting piece (12). Since the valve cover (2) or the valve device (3) located in it and in the valve housing (1) encloses an angle of approximately 50 ° with the axis of the valve housing (1), this increases the overall height for a predetermined length of the valve device (3) This pressure reducing valve is also reduced, thereby simplifying the design of the valve housing (1) and shortening the flow channels, since the mutual position of the individual components also means that the medium flowing through the valve is deflected less than is the case with a valve device at right angles the development of noise is reduced. In Fig. 2 of the drawing a pressure reducing valve is shown, which differs from the pressure reducing valve according to Fig. 1 in that the valve housing (1) on the side opposite the valve cover (2) is formed with a further flange (41) in which a protective filter (4) is screwed in sealed. Apart from the fact that a partition (42) is provided in the valve housing for this purpose, through which the medium is deflected into the protective filter (4), this pressure reducing valve has the same design as the pressure reducing valve according to FIG. 1. PATENT CLAIMS 1. Pressure reducing valve with a tubular valve housing, a valve cover and a valve device, which has a valve spring and a valve tappet, which is axially adjustable by means of a membrane against the action of the valve spring relative to a valve seat, the membrane being located in an annular space via a in the flow direction after the valve seat pressure transmission channel is connected to the flow tube, whereby the valve tappet can be controlled by the pressure behind the valve seat, characterized in that the axis of the valve device (3) with the axis of the valve housing (1) in a manner known per se Includes angles of 30 ° to 70 °, preferably an angle of approximately 40 ° to 60 °.

2. Pressure reducing valve according to claim 1, characterized in that the axis of the valve device (3) with the axis of the valve housing (1) encloses an angle of approximately 50 °

3. Pressure reducing valve according to one of claims 1 and 2, characterized in that the valve seat (31) is in continuation of the clear opening of the valve housing (1).

4. Pressure reducing valve according to one of claims 1 to 3, characterized in that in the valve housing (1) an annular surface (15) is provided whose normal axis with the axis of the valve housing (1) includes an angle of 30 ° to 70 ° and which for fastening the Valve seat (31) is used.

5. Pressure reducing valve according to claim 4, characterized in that the valve seat (31) is screwed sealingly into the annular surface (15)

6. Pressure reducing valve according to one of claims 4 and 5, characterized in that the annular valve seat (31) is penetrated by the valve tappet (32)

7. Pressure reducing valve according to one of the claims 4 to 6, characterized in that a recess (16) is provided in the valve housing (1) in which the free end of the valve lifter (32) is guided. 2 sheet drawings -3-