EP3138969B1 - Drain valve with flow current choke element - Google Patents

Description

The invention relates to a drain valve for a sanitary cistern, in particular toilet cistern, with a valve seat, a valve body having a gasket, which is movably guided in the valve seat, and a drain opening limiting valve seat, wherein the seal in the closed state of the drain valve on the Valve seat rests and releases the drain opening in the open state of the drain valve, wherein the valve seat via at least one vertical spacer which defines at least one valve seat in Spülstromfließrichtung upstream Strömungsströmung, connected to the valve seat, and wherein on the at least one spacer a Spülstrom-throttle element adjustable is stored.

Such drain valves are known (see, eg EP 2 141 294 B1 ).

The strength of the purge flow in a toilet or urinal is dependent on the height difference between the cistern and sanitary ware, the flow resistance of the cistern connected to the sanitary ware cistern and the flow resistance of the sanitary ware. If the flushing flow is too strong, this can lead to water splashes from the sanitary ware on the toilet seat and on the floor next to the sanitary ware. In order to avoid water splashes caused by excessive flushing flow, the flushing flow may be throttled. For this purpose, conventionally different throttle rings are inserted with different diameters in the valve seat of the drain valve to reduce the flow area in the valve seat. The adjustment of the purge flow with the various throttle rings is complicated and uncomfortable. In addition, individual of the throttle rings can be lost, which can then rule out a satisfactory adjustment of the purge flow.

From the US 1 021 367 A a drain valve for a toilet cistern is known, which has a Spülstromdrosselsunktion. The drain valve has an externally threaded guide tube which is screwed into a collar of a spacer having an internal thread and acts as a height-adjustable stop for a weighted element of a valve body. The guide tube thus acts at the same time as Spülstrom-throttle element.

The DE 80 06 070 U1 discloses a drain fitting with a housing in which a float having a float vessel is detachably inserted. In the lower part of the housing openings (windows) are formed, through which located in the cistern water can flow into a Ablaufstutzten. By rotating the float vessel relative to the housing, the flow area of the windows can be changed, whereby the flushing water flow can be adapted to the requirements.

From the JP 2002-021144 A a device for adjusting the flushing water amount of a toilet cistern is known. The device serves to save flushing water. For this purpose, in a arranged in the cistern tubular body Aussparrungen arranged, the effective flow areas can be adjusted by means of adjusting means.

From the US 2012/0255111 A1 is also a device for adjusting the flushing water amount of a toilet cistern known, which serves to save rinse water. The device consists of a drain valve having cylindrical means for water drainage control, on whose outer sides means for flow control are arranged. By means of the flow control means, the amount of water flowing into the cylindrical means can be adjusted, so that the flushing results in a faster sinking of a float and a valve body.

The invention has for its object to provide a device by means of which the purge flow from a sanitary cistern can be set more comfortable and reliable.

This object is achieved by a drain valve having the features specified in claim 1. Preferred and advantageous embodiments of the drain valve according to the invention are specified in the subclaims.

The drain valve according to the invention is characterized in that by rotating and moving the Spülstrom-throttle element relative to the spacer, the effective size of Spülstromfließrichtung the valve seat upstream Einströmfläche in latching steps is variable, wherein the spacer has at least a first latching element, wherein the Spülstrom-throttle element at least a cooperating with the at least one first locking element second locking element, and wherein the flushing flow throttle element has on its outer side at least one outwardly projecting projection.

The invention makes it possible to carry out an adjustment of the flushing flow by means of preferably only a single adjustable element. Since therefore no longer different throttle rings with different inner diameters must be inserted into the valve seat, the setting of the purge flow with the drain valve according to the invention designed considerably more comfortable than with the conventional throttle rings. In addition, the invention offers a cost advantage, since it requires only one additional part (flushing flow throttle element) for different settings of the purge flow.

The invention is based on the idea that a flow cross-section reduction to reduce the purge current does not have to take place in the outlet of the valve seat, but can also be arranged elsewhere in the region of the valve seat.

Preferably, the purge flow throttle element of the drain valve according to the invention is sleeve-shaped or hollow cylindrical. As a result, the throttle element can be combined very well with the housing shape or valve guide form proven drain valves.

According to the invention, the effective size of the inflow surface can be changed by means of the flushing flow throttle element in latching steps. In this way, the effective size of the inflow area can be set very comfortably as a function of a specific sanitary ceramic model and / or a specific height difference between the cistern and sanitary ware. In this case, for example, a table can be made available to the installer, in which various sanitary ceramic models and / or different values regarding the height difference between cistern and sanitary ceramics are indicated, wherein the various sanitary ceramic models and / or height differences are assigned specific setting or latching stages of the flushing flow throttle element , The installer can then take the table for the respective sanitary ware model or the respective height difference suitable adjustment or detent stage and accordingly adjust the effective size of the inflow by means of at least one purge flow throttle element.

In this case, the spacer has at least one first latching element, wherein the flushing flow throttle element has at least one second latching element cooperating with the at least one first latching element. As a result, a particularly reliable and at the same time comfortable adjustability of the effective size of the inflow surface is achieved in predetermined stages.

According to the invention, the purge flow throttle element has on its outside at least one outwardly projecting projection. The projection can be used as a gripping surface and facilitates the handling of the Spülstrom-throttle element.

A further advantageous embodiment of the invention provides that the purge flow throttle element has on its outer side at least one symbol which indicates a movement and / or direction of movement of the purge flow throttle element for a reduction or enlargement of the inflow surface. Such a symbol further enhances the ease of operation of the at least one purge flow throttle element.

In constructive and functional terms, it is advantageous if, according to a further preferred embodiment of the invention, the valve socket above the at least one spacer has a sleeve-shaped or hollow cylindrical portion which is surrounded by the purge flow throttle element and a valve seat facing lower edge, wherein the purge stream Throttle element in a position in which the effective size of the inflow is maximum, not protruding from the lower edge.

A further embodiment of the drainage valve according to the invention provides that the adjustable storage of Spülstrom-throttle element is designed such that the purge flow throttle element in its lowest position relative to the at least one spacer still allows or ensures a predetermined purge flow.

Fig.1

einen Spülkasten, in einem vertikalen Längsschnitt, mit einem darin angeordneten erfindungsgemäßen Ablaufventil in geschlossenem Zustand, in Vorderansicht;

Fig. 2

den vertikal geschnittenen Spülkasten mit dem Ablaufventil aus Fig. 1 in einer perspektivischen Darstellung;

Fig.3

eine vergrößerte Darstellung des Details Z der Fig. 1 in Vorderansicht;

Fig. 4

das vergrößerte Detail aus Fig. 3 bei geöffnetem Ablaufventil;

Fig. 5

das vergrößerte Detail aus Fig. 4 bei geöffnetem Ablaufventil in einer perspektivischen Darstellung;

Fig.6

das erfindungsgemäße Ablaufventilfassungsteil mit Ventilsitz und Spülstrom-Drosselelement aus den Fig. 5 in einer Seitenansicht, wobei sich das Spülstrom-Drosselelement in einer angehobenen Position befindet, in welcher es die gesamte Einströmöffnung freigibt;

Fig. 7

eine Querschnittansicht entlang der Schnittlinie A-A in Fig. 6;

Fig.8

das Ablaufventilfassungsteil mit Spülstrom-Drosselelement aus Fig. 6, wobei das Spülstrom-Drosselelement gegenüber der in Fig. 6 gezeigten Position um ca. 90° gedreht ist; und

Fig. 9

das Spülstrom-Drosselelement aus den Figuren 1 bis 8 in einer perspektivische Darstellung.

The invention will be explained in more detail with reference to a drawing illustrating an exemplary embodiment. Show it:

Fig.1

a cistern, in a vertical longitudinal section, with a drain valve according to the invention arranged therein in the closed state, in front view;

Fig. 2

the vertically cut cistern with the drain valve Fig. 1 in a perspective view;

Figure 3

an enlarged view of the detail Z of Fig. 1 in front view;

Fig. 4

the enlarged detail Fig. 3 with the drain valve open;

Fig. 5

the enlarged detail Fig. 4 with the drain valve open in a perspective view;

Figure 6

the Ablaufventilassung invention with valve seat and Spülstrom-throttle element from the Fig. 5 in a side view, wherein the Spülstrom-throttle element is in a raised position in which it releases the entire inflow opening;

Fig. 7

a cross-sectional view along the section line AA in Fig. 6 ;

Figure 8

the Ablaufventilfassung part with flushing flow throttle element Fig. 6 , wherein the Spülstrom-throttle element with respect to in Fig. 6 shown rotated position by approximately 90 °; and

Fig. 9

the purge flow throttle element from the FIGS. 1 to 8 in a perspective view.

In the Figures 1 and 2 a section of a sanitary cistern 1 for a toilet is shown. The bottom of the cistern 1 is provided with a tubular outlet nozzle 2, in which a valve seat 3 of a drain valve 4 can be inserted or inserted. For this purpose, the valve seat 3 has a pipe socket 3.1 which can be inserted into the drain neck 2. In the lateral surface of the pipe socket 3.1, an annular groove is formed, in which a rubber-elastic sealing ring 5 is used, which seals the pipe socket 3.1 of the valve seat 3 against the outlet nozzle 2 of the cistern 1 liquid-tight.

The valve seat 3 is connected via spacers 6, 7 with the valve seat of the drain valve 4. The spacers 6, 7 are web-shaped and attached to the pipe socket 3.1 of the valve seat 3, preferably formed. They have one of the pipe socket 3.1 radially outwardly projecting web section 6.1, 7.1 and an adjoining, substantially vertically extending web section 6.2, 7.2. The lower part of the valve socket 8 above the spacers 6, 7 is formed substantially sleeve-shaped or hollow cylindrical. With W is in Fig. 1 denotes a water level in the cistern.

The valve seat 3 is associated with a valve body 9, which is designed as an overflow pipe and axially movably guided in the valve seat. At its lower end, the valve body 9 has an annular sealing surface or seal 10. In the closed state of the drain valve 4, the sealing surface or seal 10 rests on the valve seat 3 (see in particular Fig. 3 ). In the open state of the drain valve 4, the valve body 9 is raised with the seal 10 attached thereto, so that the seal 10, the limited by the valve seat 3 drain opening 3.2 releases (see. Fig. 4 ). The arrows in Fig. 4 indicate the flow of rinsing water in the valve seat 3 and from the pipe socket 3.1 of the valve seat. The valve seat 3 has a seal 10 facing the sealing surface 3.3. Preferably, the sealing surface 3.3 is formed in the form of an annular, upwardly projecting survey.

The valve seat 3 is provided in the embodiments shown in the drawing with four spacers 6, 7, which are arranged distributed substantially uniformly over the circumference of the valve seat 3. Instead of four spacers 6, 7, the valve seat 3 may also have only three, two or only one spacer, wherein in the case of a single spacer this wider than the respective spacer 6, 7 of the plurality of web-shaped spacers 6, 7 is formed. The one or more spacers 6, 7 define at least one inflow surface E upstream of the valve seat 3 in the purge flow direction. The inflow surface E may also be referred to as inflow cross section. In the embodiments shown in the drawing which is surrounding the valve seat 3 Inflow E substantially annular or cylindrical, wherein the spacers 6, 7, the inflow E in arcuate sections (opening sections) subdivided.

At the spacers 6, 7 and the lower part of the valve housing, a purge flow throttle element 11 is adjustably mounted. By turning and moving the Spülstrom-throttle element 11 relative to the spacers 6, 7 and the valve seat 8 (and the valve seat 3), the effective size of the inflow E can change and thus the valve is open from the valve seat 3 through the pipe socket 3.1 adjust flowing purge flow. The flushing flow throttle element 11 is annular, preferably formed substantially sleeve-shaped or hollow cylindrical.

The spacers 6, 7 and the lower part of the valve socket 8 on the one hand and the flushing flow throttle element 11 on the other hand have mutually associated latching elements. The latching elements are designed in the form of a substantially vertically extending row of recesses 12 and at least one latching lug 11.1 associated with the recesses. The recesses 12 arranged in a row are formed on the vertically extending web section 6.2 of at least one of the spacers 6 on the outside or in the edge region of the web section 6.2, while the detent 11.1 is provided on the inner circumference of the flushing flow throttle element 11.

Furthermore, on the vertically extending web section 7.2 of at least one other of the spacers 7 on the outside substantially horizontally and mutually parallel ribs or grooves 13 are formed, which at least one on the inner circumference of Spülstrom-throttling element 11 formed tooth element 11.2 is assigned. The toothed element 11.2 is formed on a resilient section 11.3 of the flushing flow throttle element 11. The section 11.3 is defined by a U-shaped gap 11.4 in the purge flow throttle element 11 and may also be referred to as a spring tab or spring bar. The tooth element 11.2 prevents a unintentional unlocking of the purge flow throttle element 11, since it must overcome one of the web-shaped spacers 6, 7 when turning the purge flow throttle element 11 by outward deflection.

In the in the FIGS. 1 to 9 shown embodiment, thus the height of the Spülstrom-throttle element 11 and thus the effective size of the inflow E by unlocking or rotating the Spülstrom-throttle element 11, vertical displacement of the same and final rotation in the reverse direction for locking (locking) thereof are adjusted in stages. In order to facilitate the handling of the Spülstrom-throttle element 11, on the outside of which grip elements, for example, outwardly projecting projections 14 are formed.

Furthermore, in particular in Fig. 5 to recognize that the Spülstrom-throttle element 11 has on its outer side symbols indicating the necessary movements or directions of movement of the Spülstrom-throttle element 11 for a reduction or increase in the effective inflow E. The horizontal double arrow is associated with a latching or locking symbol 15 and an unlocking symbol 16, while the vertical double arrow 17 is associated with a plus and minus sign as symbols for increasing or reducing the effective size of the inflow surface E.

The arrows in Fig. 5 show the maximum possible height adjustment range H of the purge flow throttle element 11. The adjustment range H can be, for example, in the range of 6 to 18 mm.

In the uppermost position of the flushing flow throttle element 11, in which the effective size of the inflow surface E is maximum, the flushing flow throttle element 11 is not opposite to the valve seat 3 facing lower edge of the tubular valve seat part 8. In the uppermost position of the purge flow throttle element 11, this is preferably in complete overlap with the sleeve-shaped valve intake part 8.

The adjustable mounting of the purge flow throttle element 11 is designed such that the purge flow throttle element 11 in its lowest position relative to the spacers 6, 7 a predetermined distance (minimum distance) adheres to the valve seat 3 and thus allows a predetermined Mindestspülstrom.

Claims (5)

1. Drain valve (4) for a sanitary cistern, in particular a cistern for a toilet, comprising a valve socket (8), a valve body (9), which comprises a seal (10) and is movably guided in the valve socket, and a valve seat (3) which delimits a drainage opening (3.2), the seal (10) resting on the valve seat (3) when the drain valve is in the closed state and opening the drainage opening (3.2) when the drain valve is in the open state, the valve socket (8) being connected to the valve seat (3) by means of at least one vertical spacer (6, 7) which defines at least one inflow area (E) upstream of the valve seat (3) in the flush flow direction, and a flush flow restrictor (11) is adjustably mounted on the at least one spacer (6, 7), characterised in that it being possible to modify in stages the effective size of the inflow area (E) by rotating and displacing the flush flow restrictor (11) relative to the spacer (6, 7), the spacer (6) comprises at least one first latch element (12), the flush flow restrictor (11) comprising at least one second latch element (11.2) which interacts with the at least one first latch element (12), and the flush flow restrictor (11) comprises on the outer surface thereof at least one outwardly protruding projection (14).
2. Drain valve according to claim 1, characterised in that the flush flow restrictor (11) is in the shape of a sleeve or a hollow cylinder.
3. Drain valve according to either claim 1 or claim 2, characterised in that the flush flow restrictor (11) comprises on the outer surface thereof at least one symbol (15, 16, 17) which indicates a movement and/or movement direction of the flush flow restrictor (11) for reducing or increasing the inflow area (E).
4. Drain valve according to any of claims 1 to 3, characterised in that the valve socket (8) comprises, above the at least one spacer (6, 7), a portion that is shaped as a sleeve or a hollow cylinder and is enclosed by the flush flow restrictor (11), and a lower edge (8.1) facing the valve seat (3), the flush flow restrictor (11) not protruding with respect to the lower edge (8.1) when in a position in which the effective size of the inflow area (E) is at a maximum.
5. Drain valve according to any of claims 1 to 4, characterised in that the flush flow restrictor (11) is adjustably mounted such that it still allows a specified flush flow rate when in its lowest position with respect to the spacer (6, 7).

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