WO2017108188A1 - Drain fitting for a flush tank - Google Patents

Abstract

The invention relates to a drain fitting for a flush tank (11), comprising a housing (1) in which a movable valve plate (19) of a drain valve (23) is arranged such that a valve gap of the drain valve (23) is opened by lifting the valve plate (19) and flush water located in the flush tank (11) flows out of the flush tank (11) via a flow path (I, II, III) through at least one flow window (13) formed in the housing (1) and through the open valve gap. According to the invention, the drain fitting has an adjustable deflecting element (33) in order to adjust the flush water flowing out of the flush tank (11) per unit of time, said deflecting element being arranged at a radial distance from the flow window (13), thereby forming an annular gap (47). By adjusting the deflecting element (33), the flow path (I, III) to the housing-side flow window (13) can be lengthened or shortened.

Description

 Drain fitting for a cistern

The invention relates to a drain fitting for a cistern according to the preamble of claim 1.

A conventional toilet bowl has a rim-shaped circumferential, U-shaped profiled and downwardly open flush rim, in which lime deposits can set. In contrast, toilet bowls without rim are known in which the above U-shaped profiled flushing rim is omitted. However, in the case of a rimless toilet bowl, splashes of water may spill over the edge of the bowl during flushing. Such splashes of water can be avoided by a reduced flow rate of the rinse water flowing into the toilet bowl.

From DE 30 08 524 C2 a generic waste set for a cistern is known, by means of which the volume flow of the rinsing water flowing into the toilet, that is, the per unit time from the cistern flowing rinse water, is adjustable. The drain fitting has a housing in which a, in the axial direction stroke adjustable tube is arranged. The tube is formed in a clothing high direction with a valve plate which is part of a drain valve. By lifting the pipe, a valve gap of the drain valve is opened. As a result, the flushing water in the cistern can flow out of the flushing cistern via a flow path through at least one flow window formed in the drain fitting and through the opened valve gap.

In the above DE 30 08 524 C2, a pop-up float tank is extended down to the flushing water volume setting with an annular wall, which is on the inside of the housing with the flow windows in Appendix. The annular wall has four approximately corresponding to the flow windows through openings. By a rotary adjustment of the float vessel whose annular wall or the ausgebil- Deten passage openings are brought into different coverage with the housing-side flow windows to adjust the desired Spülwasserstrom. The setting mechanism known from DE 30 08 524 C2 has a complex structure and can be realized only by a complex adaptation of the float vessel arranged in the drain fitting housing.

The object of the invention is to provide a waste set for a cistern, in which an adjustment of the amount of flushing water compared to the prior art is easier to carry out.

The object is solved by the features of claim 1. Preferred embodiments of the invention are disclosed in the subclaims.

The invention is based on the fact that in the above prior art, the passage cross-section of the housing-side flow window can be varied by an elaborate rotational adjustment of the annular wall to adjust the flow rate of the flushing water flowing out of the cistern. In departure from such a restriction, the drain assembly according to the characterizing part of claim 1, an adjustable deflecting element. By adjusting the deflecting element, the flow path of the flushing water flowing out through the housing-side throughflow window can be adjusted, that is to say shortened or extended, in order to increase or reduce the flow velocity. For this purpose, the deflecting element is spaced apart from the flow-through window with the formation of an annular gap with a radial distance. In a technical implementation, the deflecting element may preferably be arranged radially outside the housing. In this case, the deflecting element is arranged in a flushing water flow direction upstream of the housing-side flow window. In contrast to the above prior art, therefore, the deflecting element is also described as an additional component. can be prepared without having to modify the internal technology of the drain fitting (that is to say the float vessel in DE 30 08 524 C2 above). With the invention can thus be done manually from above easy to carry out adjustment of the drain set without disassembling the drain set.

With regard to a perfect adjustment, it is preferred if viewed in the radial direction, the deflecting element is arranged substantially in alignment with the housing-side flow window. The deflection element can preferably no longer be actuated by a rotary adjustment, but rather by a more easily realizable linear adjustment. For this purpose, the deflection element may preferably be mounted on the drain fitting housing via a stroke adjustment unit and be manually adjustable with the aid of the stroke adjustment unit. The Hubverstelleinheit can be designed so that, for example via detents a predetermined number of stroke positions is easily controlled, for example, a lower, a middle and an upper stroke position, or continuously by means of a threaded spindle, each set different lengths of flow paths of the effluent rinse water.

In contrast to the above prior art, the deflecting element may be out of engagement with the housing-side flow window, that is spaced at a radial distance from the housing-side flow window, preferably with the formation of the above-mentioned annular gap, which is upstream of the flow window in the flow direction. In addition, a turbulent flow pattern can be generated in the annular gap, which further increases the flow path of the outflowing rinse water.

In a simple embodiment, the deflecting element can form a deflecting wall, which at least partially or continuously encloses the housing circumferentially. The baffle can, viewed in the clothing vertical direction, at its lower edge have a deflection edge, which runs around the flow path of the flowing in the direction of the housing-side flow window rinse water. Alternatively or additionally, the deflection wall can be have at least one passage opening, at the opening edge of a flow tab protrudes obliquely downwards. The flow flap covers the passage opening at a predefined distance, forming a passage gap. With an open drain valve of the drain fitting, the flushing water flow path can thus fork up, into a first partial flow path extending through the deflection wall passage opening and into a second partial flow path extending around the deflection edge of the deflection wall. The two partial flow paths can preferably be brought together again in the annular gap between the deflecting element and the housing-side throughflow window. In the further course of the flow, the rinse water flows through the housing-side flow windows in the direction of the toilet bowl.

In the above embodiment, the baffle may have passage openings through which the rinse water flows toward the housing-side flow windows. Alternatively, in another embodiment, the baffle can be made completely closed surface, that is, move the housing with its at least one flow window completely closed area.

The example hollow cylindrical housing of the drain fitting can go down to an annular shoulder (or a support flange) in a smaller-diameter drain pipe, which is in flow communication with a toilet bowl. It is preferred if the support flange (that is, the annular shoulder) projects beyond the deflection wall in the radial direction with a radial projection. In this case, the support flange of the housing in a double function at the same time also act as a lower housing-side axial stop. The deflection wall may be in its lower closed position with its lower deflection in abutment with the housing-side Abstützflansch. The stroke of the baffle can be limited in this case between the lower housing-side axial stop and an upper axial stop which defines the upper open position of the baffle. In the closed position, the baffle can cover at least a housing-side flow window over the entire surface, but be spaced over the slight, interposed annular gap of the radially inner housing. As mentioned above, the deflecting element can be manually adjusted via a Hubverstelleinheit. In a concrete implementation, the Hubverstelleinheit may have a drehbetätig--user drive screw, which is in driving connection, in particular in threaded engagement, with the deflecting element. The drive connection is designed such that a rotary actuation of the drive spindle is converted into a stroke adjustment of the deflection element. In a preferred embodiment, the housing of the drain fitting may have a holding bracket in which the drive spindle is rotatably mounted, but fixed in the axial direction. The drive spindle may also have an external thread, which is in threaded engagement with an internal thread formed on the stroke-adjustable deflection element. The advantageous embodiments and / or developments of the invention explained above and / or reproduced in the subclaims can be used individually or else in any combination with one another, for example in the case of clear dependencies or incompatible alternatives. The invention and its advantageous embodiments and further developments and advantages thereof are explained in more detail below with reference to drawings.

1 shows a side view of a waste fitting which can be mounted in a flushing cistern according to a first exemplary embodiment; Figure 2 is a partial sectional view of the drain set used in the cistern with a closed drain valve.

Fig. 3 to 5 are each partial views in which at different stroke positions of

 Deflection element adjusting rinse water flow paths are shown to the housing-side flow windows;

6 shows a perspective illustration of a waste fitting which can be mounted in a flushing cistern in accordance with a second exemplary embodiment;

FIG. 7 shows the waste fitting with disassembled drain valve; FIG. such as

8 and 9 are views showing the deflecting element in different stroke positions.

In Fig. 1, a waste set is shown in a unique position, which has a hollow cylindrical housing 1, which merges at the bottom of an annular shoulder 2 in a smaller diameter drain pipe 3, which is not shown in flow communication with a toilet bowl. The housing 1 is supported in the bottom 9 of a flushing cistern 11 in FIG. 2 with its annular shoulder 2 with the interposition of a seal 5 on an opening edge region of an outlet opening 7 (FIG. 2). In the set-up direction z upward close to the annular shoulder 2 on the housing side flow openings 13, which are separated in the circumferential direction by evenly spaced dividers 15 (Fig. 1) from each other. Radially inside and coaxially to the housing axis, a valve plate 19 is positioned, which is formed at a lower end of a tube 17 shown in FIGS. 1 and 2 and is stroke-adjustable together with the tube 17 in the axial direction. The tube 17 is part of an upper drain valve unit 18 (Fig. 6, 8 and 9). According to FIG. 1, the valve disk 19 together with a valve seat 21 formed on the housing-side annular shoulder 2 is part of a drain valve 23. The valve disk 19 is in not shown in detail manner associated with, for example, a manually operable operating handle, with the opening of the drain valve 23 of the valve disc 19 can be pulled upwards. Radially outside of the housing 1, an approximately cage-like executed, hollow cylindrical deflecting element 33 is arranged. With the deflection element 33, a flushing water flow path to the housing-side flow windows 13 is set when the drain valve 23 is open, that is to say extended or shortened, as will be described later. The hollow cylindrical deflecting element 33 has in FIG. 1 a lower annular wall 35 and at an axial distance an upper annular wall 37, which are connected to one another via axial webs 39. The lower annular wall 35 acts when the drain valve 23 is open as a deflection wall, by means of which the flow path of the effluent rinse water can be extended / shortened. For this purpose, the deflection wall 35 has passage openings 41 (FIGS. 2 to 5), at the upper edges of which flow tabs 43 project obliquely outwards, which cover the passage openings 41 at a distance, forming a passage gap. In addition, when the drain valve 23 is open, the lower edge of the deflection wall 35 acts as a deflection edge 45 around which the flushing water flow path runs in the direction of the housing-side flow window 13. As is further apparent from FIGS. 3 or 4, the deflecting wall 35 of the deflecting element 33 is not in abutment with the outer peripheral wall of the housing 1, but rather spaced radially outwardly from its passage window 13, forming an annular gap 47 between the housing side Flow window 13 and the deflection wall 35. In the figures, the cage-like designed deflecting element 33 by means of only roughly indicated in FIG. 1 Hubverstelleinheit 49 in the axial direction adjustable in stroke. The Hubverstelleinheit 49 is exemplified in FIG. 1 between the upper annular wall 37 of the deflecting element 33 and the housing 1 and designed so that the deflecting element 33 in predefined Stroke positions h _{1 (h 2} and h ₃ is positioned. In Fig. 2 and 3, the deflector 33 is in an intermediate position h _2, in which a medium long flow path II is established up to the housing-side flow windows. 13 In Fig. 5, the deflecting element 33 is shown in an upper stroke position h ₃ , in which a short flow path II I adjusts to the housing-side throughflow windows 13. In the upper stroke position h ₃ (FIG. 5), the lower deflecting wall 35 and the respective one housing-side flow window 13 are arranged to each other in the radial direction Y without overlapping, so that the deflection 33 h in its stroke position in the lower stroke position hi (Fig. 4) is switched without function. ₃ of the deflection element 33, however, provides a maximum flow path I to the housing-side flow windows 13, as will be described later.

In Fig. 1 or 2, the waste set is shown in a position which it occupies with empty cistern 11. If flushing water enters the cistern 11, the same fills the housing 1. If the valve plate 19 is raised by means of the actuating handle, then the flushing water flows through the housing-side flow windows 13 into the outlet connection 3.

In the middle stroke position h ₂ (FIG. 3), the deflection wall 35 partially covers the flow windows 13 in the axial direction z. With an open drain valve 23 results in the rinse water flow path II, which is picked up at the height of the baffle 35, in a first, extending through the passage openings 41 partial flow path ll _a with a, around the deflection edge 45 extending second Teilströmungsweg ll. The two partial flow paths 11 _a , 11 are brought together again in the downstream annular gap 47. In the annular gap 47 results in an additional turbulent flow pattern, whereby the Spülwasser- flow path II further increases up to the housing-side flow windows 13.

In the lower stroke position hi (FIG. 4), the deflection wall 35 completely covers the flow windows 13 in the axial direction z. This results in the stronger compared to FIG deflected flushing water flow path I. This will also be picked up at the height of the baffle 35 in a part of flow path L _A and a part-flow path Ib.

In contrast, in the lifting position h ₃ (FIG. 5), the deflecting wall 35 and the housing-side passage window 13 are arranged without overlap in the radial direction y, so that the deflecting element 33 is switched without function and has no influence on the flow path III up to the housing side Flow window 13 has.

FIG. 6 shows a waste fitting according to a second exemplary embodiment, which is essentially functionally identical to the exemplary embodiment shown in FIGS. 1 to 5. Therefore, identical elements or elements with the same function are provided with identical reference numerals.

Thus, the housing 1 is arranged radially outside of the hollow cylindrical deflecting element 33. The deflecting element 33 is not realized in the figure 6 (as in Figures 1 and 2) axially elongated. Rather, the deflection element 33 has a space-saving, axially flat structure, with a - in contrast to the previous embodiment - completely closed-wall deflection wall 35 and a laterally integrally formed threaded sleeve 63, whose operation is explained later.

The housing 1 is formed on the bottom side with an annular shoulder or a Abstützflansch 2, which in a mounting position, not shown, with the interposition of a seal on the bottom 9 of the cistern 11 can be supported (see FIG. 2). In contrast to the first exemplary embodiment, the support flange 2 projects beyond the deflection wall 35 in the radial direction y with a radial projection Ay (FIG. 9). In this way, the support flange 2 constitutes a lower housing-side axial stop, the h a closed position defined _at the baffle 35, while an upper axial stop 53 is formed (Figure 8 and 9) of the bottom of the discharge valve unit 18, the h upper open position _to defined as shown in Fig. 8. In the above Ren open position h _on the flow windows 13 are almost completely exposed. In contrast, the housing-side flow windows 13 in the lower closed position h _to (not shown) completely covered by the baffle 35. In FIG. 9, the baffle 35 _is shown near its lower closed position h, however, still spaced apart by a mild fügigen axial distance from a housing-side support flange. 2

The deflection element 33 is thus arranged in a stroke-adjustable manner according to FIGS. 6 to 9 between the lower housing-side support flange 2 and the underside of the drain valve unit 18. The drain valve unit 18 is supported in the figures 6, 8 and 9 on the upper side of the hollow cylindrical housing 1 and connected via a not shown, releasable tool-free locking connection with the housing 1. With regard to a simple assembly / disassembly of the drain valve unit 18, it is of particular importance that the deflecting element 33 is arranged below the drain valve unit 18 and that the deflecting element is designed as a separate component decoupled from the drain valve unit 18. When disassembling the drain valve unit 18 - with the release of the releasable latching connection, not shown - raised only in the clothing high z upwards without the deflection element 33 arranged underneath would form an interference contour.

As can be seen from FIGS. 6 to 9, the stroke adjusting unit 49 is realized with a drive spindle 55 which can be rotated by the user and which is positioned substantially parallel to the outlet 3 and to the pipe 17 of the drain valve 23. The drive spindle 55 is in threaded engagement with the deflection element 33, in such a way that upon a rotary actuation of the drive spindle 55, the deflection element 33 is adjustable in the axial direction. For this purpose, the housing 1 has a laterally radially outwardly projecting retaining bracket 57 with a feedthrough opening, through which a lower end piece 59 of the drive spindle 55 is guided. At the bottom

End 59 of the drive spindle 55 is an annular groove not shown in detail, in which an opening edge of the passage opening of the holding bracket 57 protrudes with a slight movement play. In this way, the drive spindle 55 is on the one hand rotatable, but on the other hand stored stationary in the axial direction. In addition, an external thread 61 is formed on the drive spindle end piece 59, which is in threaded engagement with the internal thread of the threaded sleeve 63 already mentioned above, which together with the deflection wall 35 is part of the deflection element 33.

As is apparent from Figures 6 to 9, the threaded sleeve 63 of the deflecting element 33 is arranged in the axial direction immediately below the housing-side retaining bracket 57. The threaded sleeve 63 is, as viewed in the radial direction y, positioned in the same horizontal plane as the deflection wall 35, that is positioned in alignment with the deflection wall 35 in the radial direction y. This results in the already mentioned space-saving, flat construction of the deflection element 33.

In the Figure 9, the baffle 35 _is shown near its closed position h. In the closed position h _to itself adjusts an indicated flushing water flow path IV, in which the flushing water flows from the top into the annular gap 47 between the radially inner housing 1 and the radially outer baffle 35 and then flows through the case-side flow window 13 in the outlet pipe 3 ,

LIST OF REFERENCE NUMBERS

Housing 47 Annular gap

 Ring shoulder 49 stroke adjustment unit

 Drain connection 51 Gap

 Seal 1, II, III, IV Rinse water flow paths

Outlet opening 53 upper axial stop

 Bottom 55 drive spindle

 Cistern 57 holding console

 Flow window 59 lower end piece

 Dividers 61 Male thread

 Pipe 63 threaded sleeve

 Valve disk Δγ radial projection

Valve seat h f _au upper open position

 Drain valve lower closed position

Deflection element a axial distance

 baffle

upper ring wall

 axial webs

 Passage openings

 flow tabs

 deflecting

Claims

claims Drain fitting for a cistern (11), with a housing (1) in which a movable valve plate (19) of a drain valve (23) is arranged, so that by raising the valve disc (19) a valve gap of the drain valve (23) is open and the flushing water located in the cistern (11) flows out of the cistern (11) via a flow path (I, II, III) through at least one flow window (13) formed in the housing (1) and through the opened valve gap, characterized in that the drain fitting for adjusting the rinsing water flowing out of the cistern (11) per unit of time, an adjustable deflection element (33) which is spaced apart from the flow window (13) by forming a ring gap (47) at a radial distance, and by adjusting the deflection element (33) Flow path (I, II, III) to the housing-side flow window (13) can be extended or shortened. Drain fitting according to claim 1, characterized in that the deflecting element (33) is arranged radially outside the housing (1), so that the deflecting element (33) is arranged in a flushing water flow direction upstream of the housing-side flow-through window (13), and / or the deflecting element (33) is arranged in the radial direction (y) substantially in alignment with the housing-side throughflow window (13). Drain fitting according to claim 1, 2 or 3, characterized in that the deflecting element (33) in the axial direction (z) is linear stroke adjustable, and / or that the deflecting element (33) via a Hubverstelleinheit (49) on the housing (1) is mounted and manually adjustable by means of the Hubverstelleinheit (49). Drain fitting according to one of the preceding claims, characterized in that the deflection element (33) has a deflection wall (35) which at least partially or continuously the housing (1) moves, and / or that in particular the deflection wall (35) in the clothing vertical direction (z) has at its lower edge a deflection edge (45) around which the flow path (I, II) of the water flowing in the direction of the housing-side flow window (13) flushing water, and / or that the baffle ( 35) has at least one passage opening (41), at whose opening edge a flow flap (43) protrudes obliquely, which covers the passage opening (41) to form a passage gap at a distance. Drain fitting according to claim 4, characterized in that when the drain valve (23) of the flushing water flow path (I, II) is picked up, in a through the passage opening (41) extending flow path (l _a , ll _a ) and in a order the deflection edge (45) of the deflection wall (35) extending flow path (l _b , M _b ) - Drain fitting according to claim 5, characterized in that the two partial flow paths in the between the deflecting element (33) and the housing-side flow window (13) formed annular gap (47) are merged again. Drain fitting according to one of claims 3 to 6, characterized in that by means of Hubverstelleinheit (49), the deflecting element (33) in predefined stroke positions (hi, h ₂ , h ₃ ) can be positioned, and that in particular in a lower stroke position (hi) itself sets a maximum flow path (I) to the housing-side flow window (13), in a middle stroke position (h ₂ ), a medium-long flow path (II) to the housing-side flow window (13) and in an upper stroke position (h ₃ ) is a short Flow path (III) to the housing-side flow window (13) sets, and that in particular in the upper stroke position (h ₃ ), the deflecting element (33) and the housing-side flow window (13) in the radial direction (y) are considered free of cover. 8. drain assembly according to claim 7, characterized in that the deflection wall (35) is formed as a hollow cylinder, and / or that the deflection wall (35) is formed completely closed surface and the housing (1) moves completely closed area. 9. waste fitting according to one of the preceding claims, characterized in that the housing (1) on the bottom side an annular shoulder or a Abstützflansch (2), in which in the Garniturhochrichtung (z) down a discharge nozzle (3) connects, and that of Abstützflansch (2) in the radial direction (y) the deflection wall (35) with a projection (Ay) surmounted. 10. waste fitting according to claim 9, characterized in that the deflection wall (35) between an upper open position (h _on ), which is bounded by an upper axial stop (53), and a lower closed position (h _to ), through a lower, housing-side axial stop is limited, stroke-adjustable, and that in particular the lower, housing-side axial stop is the housing-side Abstützflansch (2), and / or that in the lower closed position (h _to ) the baffle (35) with its lower deflection edge ( 45) in contact with the housing-side Abstützflansch (2). 11. Drain fitting according to one of claims 3 to 10, characterized in that the Hubverstelleinheit (49) has a drehbetätigbare by the user drive spindle (55), which is in driving connection, in particular in threaded engagement, with the deflecting element (33), so that at a rotational actuation of the drive spindle (55), the deflecting element (33) is adjustable in stroke. 12. drain assembly according to claim 11, characterized in that the housing (1) has a holding bracket (57) in which the drive spindle (55) is rotatably mounted, but fixed in the axial direction, and that the drive spindle (55) has a first thread, in particular external thread (61), which in threaded engagement with a hubverstell- Baren deflecting element (33) formed second thread, in particular internal thread (63) is. Drain fitting according to one of the preceding claims, characterized in that a drain valve unit (18) on the upper side of the housing (1) is supported, and in particular that the upper axial stop (53) through the underside of the drain valve unit (18) is formed , And that the deflecting element (33) between the lower housing-side support flange (2) and the underside of the drain valve unit (18) is arranged adjustable in stroke. Drain fitting according to claim 13, characterized in that with regard to a simple assembly / disassembly of the drain valve unit (18) the deflecting element (33) below the drain valve unit (18) is arranged, and that the deflecting element (33) as one of the drain valve unit (18) decoupled, separate component is formed, so that when disassembling the drain valve unit (18) in the clothing vertical direction (z) is raised upward without the deflection element (33) arranged underneath forms an interference contour.