EP3263782B1 - Inlet fitting - Google Patents

Description

TECHNICAL AREA

The present invention relates to an inlet fitting for the filling of a cistern according to the preamble of claim 1, and a method for producing a valve housing of such an inlet fitting (claim 14).

STATE OF THE ART

Filling valves for cisterns serve to fill cisterns with rinsing water. The EP 1 175 576 discloses such a filling valve, wherein the water is passed through the filling valve in a water guide channel. The filling valve comprises an insert body, which provides a passage with a part of the water guide channel. The passage is inclined to the longitudinal direction of the housing with the aim to achieve a swirl or turbulence of the water.

Although with regard to hydraulic function, the filling valve of EP 1 175 576 is flawless, the mechanical structure of the filling valve is relatively expensive.

PRESENTATION OF THE INVENTION

Based on this prior art, the invention has for its object to provide an inlet fitting, which overcomes the disadvantages of the prior art. In particular, the inlet fitting should be made mechanically simpler.

Accordingly, an inlet fitting for filling a cistern comprises a valve housing, a valve housing arranged in the water supply channel with an input and an output and arranged in the water supply channel float-controlled valve, which blocks the water supply channel or free during the filling gives. The entrance is in the Essentially cylindrical and defined with its central axis a major axis. The output is followed by an outlet pipe. The water guide channel has, as seen in the flow direction in front of the valve a deflection and a subsequent to the deflection valve space with said valve. The valve is movable in particular in the valve chamber and thus controls the blocking or release of the water supply channel. The valve chamber has a cylindrical wall. The deflection section is in such a way to the cylindrical wall, that the water enters in the circumferential direction to the cylindrical wall in the valve chamber. The deflection section, which ensures the deflection of the water in the water guide channel, is integrally formed on the valve housing.

The integration of the deflection section into the valve housing has the advantage that the inlet fitting can be manufactured efficiently. In other words, can be dispensed with an additional element.

The deflection section thus forms an integral part of the valve housing. An insertion of an additional part in the valve housing is thus eliminated.

The deflection section is preferably designed in such a way that the water jet flows from the deflection section into the valve space in such a way that the valve flows as homogeneously as possible.

The valve is preferably a diaphragm valve. In this case, the membrane of the diaphragm valve is flown as homogeneously as possible.

The deflection section is preferably designed in such a way that the water is deflected from a direction of flow oriented parallel to the main direction into a direction of flow inclined transversely or at an angle to the main direction.

Preferably, the deflection section is designed such that a plastic injection molding tool can be demolded in the direction of the main axis. This means that the valve housing can be produced very easily with a plastic injection molding tool and without complex demolding technology.

Preferably, a dividing line for the plastic injection molding tool is provided in the region of the discharge point of the deflection section in the valve chamber or at the discharge point of the deflection in the valve chamber. As a result, a particularly simple structure can be created.

Preferably, the deflection section and the valve space is produced by different cores of the plastic injection molding tool.

Preferably, the water guide channel in the direction of flow before the deflection on an inlet chamber, which preferably comprises a cylindrical inlet chamber wall, wherein the cross section of the inlet chamber viewed transversely to the direction of flow is greater than the cross section of the deflection.

Preferably, the cross section of the inlet chamber by a factor of 5 to 15 is greater than that of the deflection section.

Preferably, the inlet chamber is seen in the direction of flow limited with an end wall, wherein the deflection extends through the end wall.

The end wall preferably projects convexly into the inlet chamber. Alternatively, the end wall extends concavely away from the inlet chamber. In a further alternative, the end wall is formed as a flat surface.

The end wall is oriented such that water from the entrance bounces on the end wall, which is why the end wall can also be referred to as a baffle.

The convex or concave formations have the advantage that they positively influence the flow behavior of the water in said inlet chamber.

Preferably, the end wall is convexly curved about an axis which is perpendicular to the main axis and passes centrally through the intersection of the diverting section which intersects the end wall.

Preferably, the mouth of the inlet chamber is in the deflection section in the intersection of the inlet chamber wall and the end wall. That is, the mouth of the inlet chamber in the deflection located in the region of the inlet chamber wall.

In a further embodiment, the deflection section is offset with its geometric center axis to the central axis of the inlet chamber wall.

In another embodiment, as viewed from the main axis, the outermost wall bounding the diverting portion forms a continuation of said entry chamber wall.

In all embodiments, it is advantageous that the mouth of the inlet chamber in the deflection section is offset from the central axis of the inlet chamber.

Preferably, the cross-sectional shape of the deflection section is transversely to the direction of flow substantially rectangular, preferably with rounded edges. As a result, a particularly good flow in the deflection can be achieved.

Preferably, the cross-sectional area of the deflection section, as seen transversely to the direction of flow, is substantially constant over the entire length of the deflection section or increases towards the valve space.

Preferably, the deflection section has a rounded deflection surface or an angularly inclined deflection surface.

Preferably, the deflection surface is formed such that the direction of flow of the water leaves the deflection section by an angle in the range of 45 ° to 80 ° to the main axis. As a result, good water distribution can be achieved in the valve chamber.

Preferably, the deflection section is oriented in front of the deflection surface substantially parallel to the main axis.

Preferably, the deflection surface is arranged substantially in the end region of the deflection at the discharge point of the same in the valve chamber.

The deflection can also be provided at other locations in the deflection section.

Preferably, the deflection portion is directed in the region of the mouth of the same in the valve chamber on a trained with a slope along the major axis and extending around the main axis around annular surface. Through the annular surface, the water deflected by the deflection section is also displaced in a helical rotational movement about and along the main axis.

Preferably, the annular surface opens into the valve chamber or provides a limitation for the valve chamber.

The annular surface is preferably arranged opposite to the valve in the direction of the main axis.

The valve space is preferably bounded on the circumference by a wall and the end face by the valve and the annular surface.

Particularly preferably, the valve chamber is an annular space, wherein the water passage channel continues with a pipe socket in the direction of the outlet in the middle of the valve chamber. The pipe socket protrudes with a free end into the valve chamber has at the free end a sealing surface with which the valve cooperates.

Preferably, the inlet chamber and the valve chamber are connected to one another by the deflection section, wherein the inlet chamber, valve chamber and deflection section provide parts of the water guide channel.

Preferably, a nozzle unit is provided in front of the entrance into the valve housing. The nozzle unit can be connected to the input or to the valve housing or the nozzle unit can also be integrally formed on the valve housing.

The exit from the valve housing closes as mentioned an outlet pipe. The outlet tube may be connected to the valve body or integrally connected to the valve body.

Preferably, the valve is controlled by a float.

A method for producing a valve housing of an inlet fitting according to the above description is characterized in that the valve housing is produced in one piece with a plastic injection molding process, wherein a first slide of the plastic injection molding tool protrudes into the deflection section via the entrance and wherein a second slide of the plastic injection molding tool via the valve space in the Deflecting section protrudes.

Preferably, the interior of the deflection portion is completely or substantially completely formed by the first slider.

Further embodiments are given in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine perspektivische Ansicht einer Einlaufgarnitur nach einer Ausführungsform der vorliegenden Erfindung;

Fig. 2

eine perspektivische Ansicht des Ventilgehäuses der Einlaufgarnitur nach der Figur 1 von vorne;

Fig. 3

eine perspektivische Ansicht des Ventilgehäuses der Einlaufgarnitur nach der Figur 1 von hinten;

Fig. 4

eine Schnittdarstellung durch die Einlaufgarnitur nach Figur 1;

Fig. 5

eine weitere Schnittdarstellung durch eine Eintrittskammer der Einlaufgarnitur nach Figur 1;

Fig. 6

eine Detaildarstellung des oberen Teils der Einlaufgarnitur nach Figur 1;

Fig. 7

eine Schnittdarstellung entlang der Schnittlinie B-B in der Figur 6; und

Fig. 8

eine Detailansicht der Figur 7.

Preferred embodiments of the invention will be described below with reference to the drawings, which are given by way of illustration only and are not to be interpreted as limiting. In the drawings show:

Fig. 1

a perspective view of an inlet fitting according to an embodiment of the present invention;

Fig. 2

a perspective view of the valve housing of the inlet fitting after the FIG. 1 from the front;

Fig. 3

a perspective view of the valve housing of the inlet fitting after the FIG. 1 from the back;

Fig. 4

a sectional view through the inlet fitting after FIG. 1 ;

Fig. 5

a further sectional view through an inlet chamber of the inlet fitting after FIG. 1 ;

Fig. 6

a detailed representation of the upper part of the inlet fitting after FIG. 1 ;

Fig. 7

a sectional view taken along the section line BB in the FIG. 6 ; and

Fig. 8

a detailed view of the FIG. 7 ,

DESCRIPTION OF PREFERRED EMBODIMENTS

In the figures, an inlet fitting 1 according to an embodiment of the present invention for the filling of a cistern is shown.

The inlet fitting 1 comprises a valve housing 2, a water guide channel 3 arranged in the valve housing 2 with an inlet 4 and an outlet 5 and a float-controlled valve 6 arranged in the water guide channel 3, which blocks the water guide channel 3 or releases it during filling. Next, various elements of the inlet fitting 1 in the FIG. 1 shown. The inlet fitting 1 further comprises, in the embodiment shown, a float 18, which is connected via a linkage 20 to the float-controlled valve 6, whereby the float-controlled valve 6 is controlled. Other types of control are also conceivable. Furthermore, a connecting piece 21 is arranged in the region of the inlet 4, with which the inlet fitting 1 can be connected to a water supply network of the domestic installation. In the embodiment shown, the outlet 5 is adjoined by an outlet tube 7, which has a lower end 22. About this lower end 22, the water is discharged into the cistern.

In the present case, the valve housing 2 is essentially the housing in which the float-controlled valve 6 is arranged. This valve housing 2 is in the FIGS. 2 and 3 shown in isolation. The valve housing 2 has an inlet 4, which is formed substantially cylindrical. The entrance 4 extends along a central axis M which defines a major axis H. The major axis H is a geometric reference axis by means of which certain elements are related to each other. The input 4 closes, as already mentioned, a connection piece 21. The water guide channel 3 then passes through the valve housing 2 and leaves it via the output 5 again. The output 5 closes, as already mentioned, an outlet pipe 7 at. The water supply channel 3 points in the direction of flow F seen before the valve 6 a deflection section 8. The deflection section 8 is followed by a valve chamber 9, in which the said valve 6 is arranged. The arrangement of the valve 6 is in the FIG. 7 shown in more detail. In the FIG. 8 the valve housing 2 is shown alone. When viewed in the direction of flow F, the water flows in via the inlet 4 into the valve housing 2 and passes through the deflection section 8, then the valve space 9 and is fed to the outlet 5 when the valve is open.

The valve chamber 9 has a cylindrical wall 19. The deflection section 8 is in such a way to the cylindrical wall 19, that the water enters the circumferential direction of the cylindrical wall 19 in the valve chamber 9. This is in the FIG. 3 symbolized by the arrow P.

The deflection section 8 is integrally formed on the valve housing 2 according to the invention. That is, the deflection section 8 forms an integral or integrated element of the valve housing 2. It must therefore be arranged for the deflection of the water in the water channel 3 no additional element. This gives the advantage that the inlet fitting can be produced easily and efficiently.

In the embodiment shown, the deflection section 8 is designed in such a way that the water jet leaves the deflection section 8 in such a way that the valve 6 flows as homogeneously as possible. As a result, flow conditions can be optimized, which leads to a reduction in the flow loss.

The valve 6 is preferably a diaphragm valve.

Of the FIGS. 2 to 8 it is shown that the deflection section 8 is formed such that a plastic injection molding tool in the direction of the main axis H can be demolded. This means that a simple production of the valve housing 2 is made possible. In particular, a dividing line T, which in the FIG. 7 is located, provided at the discharge point 10 of the deflection 8 in the valve chamber 9. In this dividing line T, the slide, which is provided for the production of the water guide channel 3 in the valve housing 2 in the plastic injection molding tool, are separated. The arrangement of the discharge point 10 in this area allows easy demolding, since no Undercuts for the slider, which in the FIG. 8 from the left and for the other slider, which is inserted from the right, is necessary.

Seen in the direction of flow F, the water supply channel 3 in front of the deflection 8 in the valve housing 2 an inlet chamber 11. The inlet chamber 11 comprises a cylindrical inlet chamber wall 12, wherein the cross section of the inlet chamber 10 viewed transversely to the direction of flow F is greater than the cross section of the deflection section 8.

In the embodiment shown, a nozzle unit 23 projects with a reduction disk 24 into the inlet chamber 11. Nozzle unit 23 and reduction disk 24 ensure good flow conditions in the inlet chamber 11 and here are a part of the connection piece 21. The inlet chamber 11 immediately adjoins the deflection section 8. The inlet chamber 11 is seen in the direction of flow F limited with an end wall 13 which extends over the entire cross section of the inlet chamber wall 12. The deflecting section 8 extends through the end wall 13 and leaves the inlet chamber 11 via this end wall 13. In the illustrated embodiment, the end wall 13 extends convexly rounded into the inlet chamber 11. The deflection section 8 is arranged asymmetrically to the inlet chamber 11 and also to the valve chamber 9. This asymmetrical arrangement has the advantage that again good flow conditions are present in the transition from inlet chamber 11 into the deflection section 8 or from the deflection section 8 into the valve space.

The deflecting section 8 is arranged in the lower region of the inlet chamber 11 and the valve chamber 9.

The cross-sectional shape of the deflection section 8 seen transversely to the direction of flow is substantially rectangular, which in the FIG. 2 is clearly recognizable. The rectangular basic shape has rounded edges in the illustrated embodiment. This rectangular basic shape in turn good flow conditions can be achieved in the interior of the valve housing 2.

Preferably, the cross-sectional area of the deflection section 8 is transverse to the direction of flow Seen over the entire length of the deflection section 8 is substantially constant. However, it is also conceivable that the cross-sectional area of the deflection section 8 increases in the direction of flow toward the valve space 9.

With reference to the FIG. 7 Now, the shape of the deflection surface 14 will be explained in more detail. In the embodiment shown, the deflection section 8 has a rounded deflection surface 14. The deflection surface 14 may also be inclined at an angle or consist of a combination of a rounded deflection surface and an angled inclined deflection surface.

In the embodiment shown, the deflection surface 14, as in the FIGS. 7 and 8th shown, arranged such that the flow direction F of the water from the deflection section 8 in the region of the valve chamber 9 at an angle α in the range of 45 - 80 ° to the main axis H leaves the deflection section 8. This is indicated by the arrow X in the FIG. 7 shown.

In the embodiment shown, the deflection section 8 is oriented in the direction of flow F in front of the deflection surface 14 substantially parallel to the main axis H. That is, the deflecting section 8 has a partial section oriented parallel to the main axis H and a partial section deflecting the water.

The deflection surface 14 itself is arranged in the embodiment shown substantially in the end region of the deflection section 8. In the embodiment shown, the deflection surface 14 is arranged in the end region of the deflection section 8 at the discharge point 10 thereof in the valve space 9. That is, the deflection surface 14 forms the end region of the deflection section 8.

The Figures 3 and 5 show views into the valve chamber 9 inside. The deflection section 8 is directed in the region of the discharge point 10 into the valve space 9 on a trained with a slope along the main axis H and extending around the main axis H annular surface 15. The annular surface 15 is arranged helically around the main axis H around. The annular surface 15 makes about a three-quarter turn. Due to this annular surface 15 and its formation, the water in the valve chamber 9 rotated.

The annular surface 15 provides a limit for the valve chamber 9 ready. The valve chamber 9 is preferably bounded on the other side by a wall 19 and the end face by the valve and the annular surface 15.

The valve chamber 9 is, as in the FIG. 3 shown, an annular space, wherein the center of the valve chamber, the water supply channel 3 continues with a pipe extension 16 in the direction of the output. The pipe socket 16 protrudes with a free end 17 in the valve chamber 9 a. The pipe extension 16 has at the free end 17 a sealing surface with which the valve 6 cooperates. The sealing surface is in the FIG. 3 shown accordingly. The valve 6 thus abuts against this surface. When the valve is open, the valve 6, which with FIG. 3 is not shown, spaced from this surface and forms a kind of deflection, so that the water from the valve chamber 9 can enter into the pipe socket 16. The water is then fed via the tube extension 16 to the outlet 5.

With regard to the direction of flow F is also noted that this is oriented in the region of the input 4 in the direction of the main axis H and that this is oriented transversely, in particular at right angles, to the main axis H in the region of the output 5. This means that water is deflected in the valve housing 2. LIST OF REFERENCE NUMBERS 1 inlet fitting H main axis 2 valve housing P Water entering direction 3 Water duct 4 entrance X Towards the water 5 exit deflecting 6 Valve α corner 7 outlet pipe 8th deflecting 9 valve chamber 10 opening point 11 inlet chamber 12 Entry chamber wall 13 bulkhead 14 deflection 15 ring surface 16 pipe extension 17 free end 18 swimmer 19 cylindrical wall ** 20 linkage 21 spigot 22 lower end 23 nozzle unit 24 reducing disk F flow direction T parting line M central axis

Claims (15)

1. Inlet fitting (1) for the filling of a cistern, comprising
   a valve housing (2),
   a water conduit (3) arranged in the valve housing (2) with an entry port (4) and an exit port (5), and a float-controlled valve (6) arranged in the water conduit (3), which blocks the water conduit (3) or opens it up during the filling,
   wherein the entry port (4) is formed in a substantially cylindrical manner and defines by its centre axis (M) a principal axis (H),
   wherein an outlet pipe (7) is connected to the exit port (5),
   wherein the water conduit (3) has a deflection section (8) upstream of the valve (6), when looking in the flow direction, and a valve space (9) with said valve (6), the valve space (9) being connected to the deflection section (8),
   wherein the valve space (9) has a cylindrical wall (19) and wherein the deflection section (8) stands in such a way with respect to the cylindrical wall (19) that the water enters the valve space (9) in a circumferential direction to the cylindrical wall (19), characterized in that
   the deflection section (8) is integrally formed on the valve housing (2).
2. Inlet fitting (1) according to Claim 1, characterized in that the deflection section (8) is designed such that a plastic injection moulding die is releasable in the direction of the principal axis (H).
3. Inlet fitting (1) according to Claim 2, characterized in that a dividing line (T) for the plastic injection moulding die is provided in the region of a discharge point (10) of the deflection section (8) into the valve space (9) or at a discharge point (10) of the deflection section (8) into the valve space (9).
4. Inlet fitting (1) according to one of the preceding claims, characterized in that the water conduit (3) upstream of the deflection section (8), when looking in the flow direction (F), has an entry chamber (11), which preferably has a cylindrical entry chamber wall (12), wherein the cross section of the entry chamber (11), when looking transversely to the flow direction (F), is larger than the cross section of the deflection section (8).
5. Inlet fitting (1) according to Claim 4, characterized in that the entry chamber (11), when looking in the flow direction (F), is bounded by an end wall (13), wherein the deflection section (8) extends through the end wall (13) and wherein the end wall (13) preferably protrudes into the entry chamber (11) in a convex manner, or wherein the end wall (13) extends away from the entry chamber (11) in a concave manner, or wherein the end wall (13) is fashioned as a level surface.
6. Inlet fitting (1) according to one of Claims 4 or 5, characterized in that the discharge port of the entry chamber (11) into the deflection section (8) is situated in the region of intersection of the entry chamber wall (12) and the end wall (13); and/or
   that the deflection section (8) lies with its geometrical centre axis set off from the centre axis of the entry chamber wall (12); and/or
   that the outermost wall bounding the deflection section, when looking from the principal axis (H), forms a continuation of said entry chamber wall (12).
7. Inlet fitting (1) according to one of the preceding claims, characterized in that the cross section shape of the deflection section (8), when looking transversely to the flow direction, is substantially rectangular, preferably with rounded corners, and/or that the cross sectional area of the deflection section (8), when looking transversely to the flow direction, is substantially constant over the entire length of the deflection section (8) or increases toward the valve space (9).
8. Inlet fitting (1) according to one of the preceding claims, characterized in that the deflection section (8) has a rounded deflection surface (14) and/or a deflection surface (14) inclined at an angle.
9. Inlet fitting (1) according to Claim 8, characterized in that the deflection surface (14) is formed such that the flow direction of the water from the deflection section (8) exits from the deflection section (8) at an angle (α) in the range of 60° to 80° to the principal axis (H).
10. Inlet fitting (1) according to Claim 9, characterized in that the deflection section (8) is oriented substantially parallel to the principal axis (H) upstream of the deflection surface (14).
11. Inlet fitting (1) according to Claim 9 or 10, characterized in that the deflection surface (14) is arranged substantially in the end region of the deflection section (8) at the discharge point (10) of the deflection section (8) into the valve space (9).
12. Inlet fitting (1) according to one of the preceding claims, characterized in that the deflection section (8) in the region of its discharge point (10) of the deflection section (8) into the valve space (9) is directed at an annular surface (15) formed with an inclination along the principal axis (H) and extending about the principal axis (H).
13. Inlet fitting (1) according to Claim 12, characterized in that the annular surface (15) discharges into the valve space (9) or provides a limitation for the valve space (9).
14. Method for manufacturing a valve housing of an inlet fitting according to one of the preceding claims, characterized in that the valve housing is produced as a single piece by a plastic injection moulding process, wherein a first slide of the plastic injection moulding die protrudes through the entry port into the deflection section and wherein a second slide of the plastic injection moulding die protrudes through the valve space into the deflection section.
15. Method according to Claim 14, characterized in that the inner space of the deflection section is formed entirely resp. substantially entirely by the first slide.

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