EP1650361B1 - Sanitary build-in piece - Google Patents

Abstract

Sanitary fitting (100) is formed as flow regulator and has outer casing (2) whereby it combines function of flow regulator and back flow inhibitor and its regulator body is used as closing body at same time. Closing body is compressible against flow direction in closing position sealed against valve seat (15) and is restricted in opening position between itself and housing inner wall of control gap (4).

Description

The invention relates to a sanitary fitting for insertion into a liquid line, which is designed as a flow regulator and has an outer housing, in the housing interior, an elastically deformable body is arranged, which defines a control gap between itself and the housing inner wall, the passage cross-section through the can be varied depending on the forming when flowing through the outer housing fluid pressure regulating body.

It has already created various sanitary fixtures, which are intended for insertion into a liquid line and designed, for example, as a flow regulator or as a backflow preventer.

So already known as a flow regulator designed sanitary fittings, which have in their regulator housing an elastic rubber ring, the ring opening passes through a central control core. This elastic rubber ring, which deforms as a function of the fluid pressure forming when it flows through the regulator housing, regulates the clear cross-section of the respective flow regulator and thus its liter power per unit time as a function of the water pressure to a defined maximum value.

Since each of these previously known flow rate controllers is designed for a specific maximum value, different flow rate controllers are to be stored for different maximum values. The complexity associated with the production of the prior art flow regulator due to the complexity is therefore further increased by the storage of such different flow regulator.

It has also already created a usable in a liquid line sanitary fixture that combines the function of a backflow preventer and a venting valve in itself (see. GB-A-1 414 623 ). The previously known installation part has an outer housing, in the housing interior of which a spherical closing body is provided. This spherical closing body can be pressed in a closed position against a valve seat. While the backflow preventer is formed by the spherical closing body and the associated valve seat, the venting valve is connected downstream of the backflow preventer in the usual flow direction. The vent valve has an annular disk-shaped closing body, the annular opening of which leaves a throughflow channel and which, with its annular surface in the closed position of the venting valve, rests sealingly on a ventilation opening coaxial with the throughflow channel.

In the GB-A-1 414 623 is described that the incorporation of such a backflow preventer, for example, become necessary can, in the case of a shower head located in a bathtub filled with dirty water to prevent suction of dirty water through the shower head in the event of a suction side occurring surprisingly negative pressure. The vent valve usually remains in its closed position and is effective only in malfunction of the backflow preventer, in which on the downstream side pressure equalization to atmospheric pressure is required.

From the US-A-5,752,542 already a stopcock is known, which has a piston-like and adjustable against a valve seat obturator. At the valve seat facing free end of the piston-like obturator serving as a backflow preventer rubber element is provided with an annular circumferential sealing lip, which sealing lip deformed by flowing in the usual direction water in the flow direction that between the outer annular zone of the sealing lip on the one hand and the inner circumference of Valve housing on the other hand a flow channel remains. If, however, an effective water pressure acts in the opposite direction on the sealing lip, the sealing lip is erected by this backflow in such a way that it can seal against the inner circumference of the valve housing.

From the US-A-5 143 117 already a backflow preventer with a tubular and consisting of two pipe sections valve housing is known. Between these two housing parts, which are connected to each other by means of a union nut, a valve body is clamped, which has a the adjacent pipe sections of the valve housing sealingly acting outer ring with radially intersecting stabilizing ribs. This valve body carries on its downstream flat side a flap-shaped Closing body, which opens in the usual direction of flow in the flow direction, in order to create a sealing in the case of an undesirable backflow to the downstream end face of the valve body and the closing body supporting stabilizing ribs.

However, these prior art mounting parts are essentially limited to the function of a backflow preventer.

Additional disadvantages may arise if the intended use requires the combination of such a flow regulator with a backflow preventer. Although it has already created a sanitary fitting, in which such a flow regulator with a separate backflow preventer is combined to form a cartridge designed as a unit (see. DE 196 03 393 A1 ). This previously known sanitary fixture can be installed with little effort, without incorrect assembly would be feared; however, by combining a flow rate regulator and a backflow preventer, the prior art sanitary fixture has a comparatively long length, which can limit the area of use of this fixture. In addition, the separate functional units of the prior art sanitary fixture must be composed of a plurality of components, which is associated with a correspondingly high production cost.

There is therefore in particular the task of creating a sanitary fitting of the type mentioned, which is as versatile as possible and yet relatively inexpensive to produce.

The achievement of this object is in the sanitary fitting of the type mentioned in particular in that the sanitary fitting unites the function of a flow rate regulator and a backflow preventer and its control body at the same time serves as a closing body, which is against the flow in a closed position sealingly pressed against a valve seat and in an open position between itself and the housing inner wall limited the control gap.

This built-in part according to the invention assumes both the function of a flow rate regulator and the function of a backflow preventer. The fitting according to the invention has for this purpose an elastically deformable regulating and closing body, which is arranged in the housing interior of the outer housing. This shaped body can be pressed counter to the direction of flow in a closed position against a valve seat such that a backflow of the liquid over the insert according to the invention is also prevented with certainty. In addition, however, this shaped body also serves as a regulating body, which delimits between itself and the housing inner wall a control gap whose passage cross-section is variable by the regulating and closing body which deforms as a function of the fluid pressure forming when the outer housing flows through. Since the molding provided in the housing interior of the mounting part according to the invention serves both as a closing body of a backflow preventer and as a control body of a flow regulator, the built-in invention can be produced with little effort from a few components. Since it is possible to dispense with separate flow rate regulator and non-return valve in the built-in component according to the invention, the built-in part is characterized by a comparatively small installation length. The built-in part according to the invention is therefore versatile even in confined spaces. At Pressurization to promote a more uniform deformation of the control and closing body and to ensure proper operation of the insert according to the invention regardless of the position of the control and closing body, it is advantageous if the control and closing body has a spherical shape in the unloaded state.

The regulating and closing body can easily and precisely react even to slight pressure changes when the regulating and closing body is designed as an elastic hollow or foam body.

In order to achieve the highest possible reaction speed in the built-in component according to the invention, it is advantageous if the control and closing body is arranged in the unloaded state in the flow direction substantially free of play between the valve seat on the one hand and a preferably centrally arranged outflow side regulating and closing body system on the other.

So that the liquid stream can pass through the built-in component according to the invention up to the maximum value of the liter output per unit time, it is advantageous if the housing inner wall delimits flow channels distributed in the circumferential direction between itself and the regulating and closing body. In this case, a preferred embodiment according to the invention provides that the outer housing has a non-round, preferably a polygonal and in particular a substantially hexagonal clear cross-section.

In order to ensure a proper function of the built-in part according to the invention, it can be advantageous if the valve seat is preceded by a front screen in the direction of flow.

Further features of the invention will become apparent from the following description of an embodiment of the invention in conjunction with the claims and the drawings. The individual features may be implemented individually or in combination in an embodiment according to the invention.

• Fig. 1 ein als sanitäres Regel- und Sicherungsteil ausgebildetes Einbauteil in einem Längsschnitt (vgl. Fig. 1a) und in einem Querschnitt (vgl. Fig. 1b) mit einem im Gehäuseinneren befindlichen elastischen Regel- und Schließkörper, wobei Fig. 1 die Regel- und Schließkörper in unbelastetem Zustand zeigt,
• Fig. 2 das sanitäre Einbauteil aus Fig. 1 in einem Längsschnitt (vgl. Fig. 2a) und in einem Querschnitt (vgl. Fig. 2b), wobei der sich im Gehäuseinneren befindliche Regel- und Schließkörper in einer vom Flüssigkeitsdruck verformten Offenstellung dargestellt ist,
• Fig. 3 das sanitäre Einbauteil aus Fig. 1 und 2 in einem Längsschnitt (vgl. Fig. 3a) und einem Querschnitt (vgl. Fig. 3b), wobei der im Gehäuseinneren befindliche Regel- und Schließkörper bei einem gegenüber Fig. 2 erhöhten Flüssigkeitsdruck dargestellt ist und
• Fig. 4 das sanitäre Einbauteil aus Fig. 1 bis 3 in einer Draufsicht auf dessen zuströmseitige Stirnfläche.
• In den Figuren 1 bis 4 ist ein sanitäres Einbauteil 100 dargestellt, das in eine hier nicht weiter dargestellte Wasserleitung einsetzbar ist. Das in den Figuren 1 bis 4 dargestellte sanitäre Einbauteil 100 ist als Regel- und Sicherungsteil ausgestaltet und beinhaltet die Funktionen eines Durchflussmengenreglers und eines Rückflussverhinderers. Das zum Einsetzen einer Flüssigkeitsleitung vorgesehene Einbauteil 100 ist an eine hier nicht weiter dargestellte Wasserleitung in einer als Patronenaufnahme ausgebildeten Ausnehmung eines Wasseranschlusses im Bereich einer Kupplungs- oder Trennstelle mündungsseitig einschiebbar.

It shows:

• Fig. 1 a designed as a sanitary control and securing part fitting in a longitudinal section (see Fig. 1a) and in a cross section (see Fig. 1b) with a housing located inside the elastic control and closing body, Fig. 1, the rule and closing body in the unloaded state,
• 1 in a longitudinal section (see Fig. 2a) and in a cross section (see Fig. 2b), wherein the regulating and closing body located inside the housing is shown in an open position deformed by the fluid pressure .
• 1 and 2 in a longitudinal section (see Fig. 3a) and a cross section (see Fig. 3b), wherein the control and closing body located inside the housing at a relative to Fig. 2 increased fluid pressure is shown and
• Fig. 4, the sanitary fitting of Fig. 1 to 3 in a plan view of the inflow-side end face.
• In Figures 1 to 4, a sanitary fitting 100 is shown, which can be used in a water pipe not shown here. That in FIGS. 1 to 4 illustrated sanitary fitting 100 is designed as a control and safety part and includes the functions of a flow regulator and a backflow preventer. The built-in part 100 provided for insertion of a liquid line can be inserted at the mouth side into a water line, not shown here, in a recess of a water connection designed as a cartridge receptacle in the region of a coupling or separation point.

The sanitary installation part 100 according to FIGS. 1 to 4 has an outer housing 2, in the housing interior of which an elastically deformable regulating and closing body 3 'is provided. The control and closing body 3 'of the sanitary fixture 100 has a spherical shape in the unloaded state and is designed as an elastic hollow body. In the closed position shown in FIG. 1, the regulating and closing body 3 'can be pressed against a valve seat 15, which is provided on the inflow side of the regulating and closing body 3' and is designed as an annular opening widening conically in the direction of flow Pf1.

As is clear from a comparison in particular of Figures 2a and 3a, limits the control and closing body 3 'in its reached due to the water pressure open position between itself and the housing inner wall a control gap 4, the passage cross-section through which in response to the flow the outer housing 2 forming fluid pressure deforming control and closing body 3 'is variable. Thus, the control gap 4 is increasingly narrowed in the increased in Fig. 3a and 3b fluid pressure and the liter performance of the built-in part 100 adjusted to a certain maximum value.

The comparison of Figures 1a, 2a and 3a on the one hand and Figures 1b, 2b and 3b on the other hand clearly shows that the housing inner wall of the mounting part 100 between them and the control and closing body 3 'in the circumferential direction preferably uniformly distributed flow channels 16 limited Even with a high water pressure and a strong compression of the regulating and closing body 3 'ensure a flow of tap water through the mounting part 100. The outer housing 2 of the built-in part 100 has for this purpose a non-circular, here hexagonal clear cross-section, so that in the corner regions of this hexagonal shape, the flow channels 16 form. In this case, the regulating and closing body 3 'in its outer diameter in the unloaded state is approximately adapted to the small dimension of this clear housing cross-section of the built-in component 100 extending through the longitudinal central axis.

In order to ensure fast reaction times, the regulating and closing body 3 'of the built-in part 100 is held in the unloaded state substantially free of play between the valve seat 15 on the one hand and a downstream body-system 6 on the other. When the regulating and closing body 3 'is acted upon by the water pressure acting in the direction of flow Pf 1, the regulating and closing body 3' is increasingly pressed against the regulating body system 6, which serves the regulating and closing body 3 'as an abutment.

The outer housing 2 of the built-in part 100 has two housing parts 9, 10, which can be pushed into one another and latched. If required, the outer housing of the built-in part 100 with its regulating body systems 6, 15 can be designed such that these regulating body systems 6, 15 are adjustable and fixable. To keep the control and closing body 3 'captive in the outer housing 2 and To counteract the settling of dirt particles in the housing interior of the outer housing 2, the valve seat 15 of the built-in part 100 is preceded by a front screen 17 in the flow direction Pf 1. As is clear from the plan view in Figure 4, the screen openings of the attachment screen 17 are arranged approximately honeycomb to each other.

Since the molded body 3 'provided inside the housing 100 serves both as a regulating body of a flow rate regulator and as a closing body of a non-return valve, the sanitary fitting 100 can be produced from few components with little effort. Since in the built-in part 100 can be dispensed with the combination of separate flow rate regulator and backflow preventer, the built-in part 100 is characterized by a low installation height and by its versatility versatility.

Claims (7)

1. Sanitary build-in piece (100) for inserting in a fluid-carrying pipe, which is constructed as a flow regulator and comprises an exterior housing (2) inside which is mounted an elastically deformable regulating member (3') which defines, between itself and the inner wall of the housing, a control slot (4) the cross-section of flow of which can be varied by the regulator (3') that is deformed as a function of the fluid pressure building up as fluid flows through the exterior housing (2), characterised in that the sanitary build-in piece (100) combines the functions of a flow regulator and and a backflow preventer and for this purpose its regulating member simultaneously serves as a sealing member (3') which can be pressed against a valve seat (15) counter to the direction of flow (Pf 1) so as to form a seal and in an open position delimits the control slot (4) between itself and the inner wall of the housing.
2. Sanitary build-in piece according to claim 1, characterised in that the regulating and sealing member (3') is spherical in shape in the nonloaded state.
3. Sanitary build-in piece according to claim 1 or 2, characterised in that the regulating and sealing member (3') is constructed as a resilient hollow or foam body.
4. Sanitary build-in piece according to one of claims 1 to 3, characterised in that the regulating and sealing member (3') in the nonloaded state in the direction of flow (Pfl) is arranged substantially without play between the valve seat or similar regulating and sealing member emplacement (15) on the one hand and a preferably centrally disposed regulating and sealing member emplacement (6) on the downstream side, on the other hand.
5. Sanitary build-in piece according to one of claims 1 to 4, characterised in that the inner wall of the housing defines flow channels (16) distributed between it and the regulating and sealing member (3') in the circumferential direction.
6. Sanitary build-in piece according to one of claims 1 to 5, characterised in that the exterior housing (2) has a non-round, preferably a polygonal and more particularly a substantially hexagonal internal housing cross-section.
7. Sanitary build-in piece according to one of claims 1 to 6, characterised in that a sieve insert (17) is provided in front of the valve seat (15) in the direction of flow (Pf 1).

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