EP3553238A1 - Drain device for fluids with non-return valve working as odour trap - Google Patents

Abstract

A drainage device for liquids with a base body (10) and an attachment element (20) connected to the base body (10), in which an insert element (30, 40) with a housing (30) and a movable closing element (40) is inserted. A cover element (50) is arranged on the attachment element (20) and is partially permeable to liquid. The closing element (40) serves as an odor trap and as a backflow barrier, the closing element (40) sealing a liquid inlet from a liquid drain in a first position, which is upper in the installed position, and the closing element (40) from the first position in the installed position downwards into at least one other Position is movable which allows a drainage of liquid from the area of the liquid inlet to the area of the liquid outlet. The drainage device is characterized in that at least one spacer element (31,32,51a, 52a) is arranged between the housing (30) of the insert element and the cover element (50), the at least one spacer element (31,32,51a, 52a) prevents the housing (30) from moving upward.

Description

The invention relates to a drainage device for liquids comprising a main body; an attachment element having a fluid inlet and a fluid outlet, which is connected to the base body; an insert member having a housing and a movable closure member; and a cover member disposed on the attachment member and partially permeable to liquid; wherein the closure member seals a portion of a liquid inlet from a portion of a liquid drain in a first position, and the closure member is movable from the first position to a first direction in at least one further position which drains liquid from the region of the liquid inlet to the region of the liquid inlet Fluid drain allowed.

State of the art

In the EP 2 743 414 A1 discloses a drain device for liquids, which is designed as an odor trap with backpressure barrier. There forms a closure element by means of spring supported by a cavity as a buoyant body, which still presses back against a seal seat in backwater. The problem may arise that the odor trap used detaches from the attachment and is pushed vertically upwards, so that the backpressure barrier is overcome.

In the US 1,137,516 discloses a similar odor trap with a backpressure barrier, which is bolted to the surrounding housing. Although this ensures a secure fit against lifting, but in practice to the disadvantage that the odor trap due to contamination, for example, by hair or other residues, hardly to solve, and thus virtually impossible to clean or maintain ,

In another construction according to the US 2007/0215212 A1 However, there is the problem that, although a simple removal for maintenance is possible, but with excessive back pressure can push out the Rückstausperre upwards.

Description of the invention

In view of the drawbacks of the prior art drain trap and backpressure drainage devices, it is the object of the present invention to at least partially overcome these disadvantages.

This object is achieved by the inventive drain device according to protection claim 1.

The invention provides a drainage device for liquids comprising a body; an attachment element which is connected to the base body, wherein the base body has a first sealing ring which seals the connection with the attachment element; an insert member having a housing and a movable closure member, the housing of the insert member having a second sealing ring which seals the connection of the housing with the attachment member; and a cover member disposed on the attachment member and partially permeable to liquid; wherein the closure member seals a portion of a liquid inlet from a portion of a liquid drain in a first position, and the closure member is movable from the first position to a first direction in at least one further position which drains liquid from the region of the liquid inlet to the region of the liquid inlet Fluid drain allowed. The drainage device is characterized in that between the housing of the insert element and the cover at least one spacer element is arranged, wherein the at least one spacer element prevents movement of the housing in a second direction, which is opposite to the first direction. This avoids that the insert element is pressed out in a backflow of liquid from the attachment element and liquid counter to the intended flow direction, namely the first direction flows.

According to a development, the at least one spacer element is provided on the housing.

In this case, the spacer elements or on the housing is preferably formed integrally with the housing, in particular as an injection molded part.

This can be developed to the effect that two or more spacer elements are provided on the housing of the insert element. Due to the two or more spacer elements, the support of the insert element can be further improved.

This can in turn be developed to the effect that the housing has a substantially round shape and the two or more spacer elements are arranged so that a movement of the housing in the second direction is prevented. In this way, a tilting or a one-sided pushing out of the insert element can be avoided in the case of a force applied due to backpressure in the second direction. In particular, the housing may have a substantially circular shape, and two spacer elements may be arranged on two diametrically opposite edge regions.

According to another embodiment, the at least one spacer element is arranged on the cover.

In this case, two spacers are preferably arranged on the cover.

This can be developed to the effect that the cover has a substantially rectangular shape, in particular a substantially square shape, and the two spacer elements are arranged on the cover at two mutually diagonal corner regions.

Alternatively, the cover may have a substantially circular shape and the two spacer elements may be arranged on the cover on two diametrically opposite edge regions.

In a further development, the cover element has an attachment nose and a closure device, the attachment nose spreads into the attachment element, the closure device for closing the cover element on the attachment element is rotatable up to a stop provided on the cover element, and a first of the spacer elements on the attachment element Covering element as an extension of the attachment nose and a second of the spacer elements are formed on the cover as an extension of the stopper.

According to another embodiment, a spacer element is arranged on the housing, and a spacer element is provided on the cover.

This can be developed to the effect that the housing has a substantially circular shape and the two spacer elements between two diametrically opposite edge regions of the housing and the cover are arranged.

In another development of the drain device according to the invention, the movable closing element is pivotally provided on the housing of the insert element, such as in the EP 1 567 373 A2 described.

Hereinafter, the present invention will be described and explained with reference to two preferred embodiments with reference to the accompanying drawings.

Brief description of the drawings

Fig. 1

shows a first embodiment of the drain device according to the invention. It is in Fig. 1A an exploded view shown in Fig. 1B a sectional view with closed closing element and in Fig. 1C a sectional view with the closing element open.

Fig. 2

shows a second embodiment of the drain device according to the invention. It is in Fig. 2A an exploded view shown in Fig. 2B a sectional view with closed closing element and in Fig. 2C a sectional view with the closing element open.

Description of the embodiments

The first embodiment according to Fig. 1 shows a drain device according to the invention for liquids, the device shown is provided as a drain, for example in the sanitary area for a shower or the like. It shows Fig. 1A an exploded view of the individual components of the drainage device, and the Figs. 1B and 1C show sectional views.

The illustrated drain device is provided for a predetermined installation position such that a first direction relates to the direction of gravity (downward direction), and accordingly, a second direction refers to the direction opposite to gravity (upward direction). In the intended mounting position of the downcomer, an axis of symmetry of the circular cross-sectional components extends vertically, i. in the direction of gravity.

The drainage device comprises a main body 10, an attachment element 20 which is connected to the main body 10; an insert member having a housing 30 and a movable closure member 40; and a cover member 50 disposed on the attachment member 20, wherein the liquid masking member 50 is partially permeable through slits 53 provided therein.

The embodiment shown thus has at the top a liquid inlet (slots 52 of the cover member 50) over which water tapers. The drainage device furthermore has a liquid drain (openings 11 of the main body 10), via which the water is discharged via a further drainage system, for example, to a duct connection.

The closure element 40 seals in a first, upper position a region of a liquid inlet from a region of a liquid outlet. The closing element 40 is made of the first in Fig. 1C shown position in the first direction (down) in at least one further in Fig. 1B shown movable position, which allows a drainage of liquid from the region of the liquid inlet to the region of the liquid drain.

The drain device is characterized in that between the housing 30 of the insert member and the cover 50, two spacer elements 31, 32 are arranged, which prevents movement of the housing 30 in the second direction (upwards).

The cover element 50 has a fastening lug 51 and a closure device 52, wherein the fastening lug 51 spreads or hooks into the attachment element 20. The closure device 52 is rotatably arranged on the attachment element 20 for closing the cover element 50.

Alternatively, the cover member 50 instead of the fastening lug 51 and the closure device 52 by means of screws (for example, two screws, not shown) attached to the attachment element 20.

The main body 10 is substantially rotationally symmetrical about a vertical axis. Likewise, this applies to the lower part of the attachment element 20, the housing 30 of the insert element and the closing element 40.

The individual components of the drainage device are sealed by seals against a liquid passage. The main body 10 has a sealing ring 61, which seals the connection with the attachment element 20. The housing 30 of the insert element has at the upper edge on a sealing ring 62, which seals the connection of the housing 30 with the attachment element 20. The housing 30 further comprises at the lower edge a sealing ring 63, which seals the edge-side connection with the closing element 40 in the first, upper position.

The movable closing element 40 is arranged concentrically with the attachment element 20 and the housing 30. This movable closure member 40 has a shank portion 41 extending along the vertical axis. The shank portion 41 of the closure member 40 extends in the second direction (in the installed state of the downcomer upward) into a holding device 35. The end portion of the shank portion 41 is cylindrical and is mounted in a cylindrical holding guide. In the illustrated embodiment, the end portion of the shaft portion 41 is surrounded by a coil spring (or similar resilient member) (not shown) urging the closure member 40 upwardly along the vertical axis toward the first position in which the drain device is occluded. There is thus a corresponding bias of the coil spring. In alternative embodiments, such a spring element is designed as an elastic tension spring rod, disc spring or gas pressure spring.

The coil spring serves as a spring member to apply a holding force on the closing member 40 in the second direction. The closing element 40 is movable along the vertical axis from the first position against the spring force of the spring element, and thus can assume at least one further position in which the discharge device is opened, as will be explained in detail below.

In the illustrated embodiment, the movable closure member 40 is formed with its respective sections as a one-piece injection molded plastic part. Alternatively, the closing element 40 may be at least partially made of a metallic material, which may be advantageous, for example, when used for chemically aggressive liquids.

As in FIG. 1 shown, the holding device 35 is held in the housing 30 via webs 36. In the embodiment shown, three webs are provided by way of example.

The radially inner side surface of the housing 30 and the upper surface of the closing element 40 form a fluid receiving chamber. This liquid receiving chamber is open in the second direction (in the installed state upward) and is sealed by means of the seal 63 between the closing member 40 and the lower end portion of the housing 30 in the first direction (down in the installed state).

When using or configuring the drainage device in the sanitary area, in particular for a shower or bath drain, the drainage device is inserted essentially flush at the lowest point of the bath or the shower area. Depending on the specific use of the drainage device in the sanitary area, in certain embodiments, a further closure device is provided, which in principle prevents drainage of water in the closed state.

Hereinafter, the operation and the function of the drain device in particular with reference to the FIGS. 1B and 1C explained.

When the drain device is used as intended, a liquid, for example shower water, flows in via the slots 53 as a liquid inlet and collects in the liquid receiving chamber closed downwards by the closing element 40, as in FIG Fig. 1C shown. The liquid collects even at small quantities directly at the Seal 63. This liquid level supports the odor trap function of the drainage device and forms a correspondingly annular seal.

By the inflow of further liquid, the liquid level in the liquid receiving chamber increases until a predetermined liquid level is reached in the liquid receiving chamber. In this liquid level, the weight force of the intended liquid (e.g., water) corresponds to the holding force of the spring member. The weight of the liquid in the liquid receiving chamber acts in the first direction (down) and thus against the spring force acting in the second direction (up).

With a further increase in the amount of liquid in the liquid receiving chamber, the movable closing member 40 is moved in the first direction and opens the portion of the seal 63 between the movable closing member 40 and the housing 30 so that liquid can drain into a liquid discharge chamber of the main body 10. The liquid in the liquid discharge chamber then flows via the liquid outlet 11 into the channel connection or the like provided for this purpose. By the drainage of liquid from the liquid receiving chamber, the liquid level falls in the liquid receiving chamber, so that is moved by the change in weight of the liquid on the upper surface of the movable closing element 40 in the second direction due to the spring force and optionally the first position, that is Closing position, occupies. If there is a substantially constant inflow of water, an equilibrium will be established between the force through the water column in the liquid receiving chamber and the spring force associated with a substantially constant second position of the closure member 40. The inflow amount of liquid then substantially corresponds to the effluent amount on liquid. Fluctuations in the inflow amount of liquid via the liquid inlet are compensated by corresponding movement of the movable closing element 40.

With a backflow of the draining liquid into the liquid drainage chamber of the main body 10, the closing element 40 moves in the second direction, that is in the direction of the closed position or it is already in this position. An overflow of Rückstauflüssigkeit from the liquid drain chamber into the liquid receiving chamber is prevented, so that a backpressure lock function is ensured.

Due to the backflow, a force is exerted on the closing element 40 from below, and thus also on the housing 30 of the insert element. Although in principle there would be the danger that the insert element with the seal 62 is pushed out of the attachment element 20, this is not possible due to the spacer elements 31, 32. These spacers 31, 32 are formed so as to be in contact with the cover member 50 from below, thus preventing them from being forced out of the sealed position. This function is assisted by the fact that the cover element 50 is fastened to the attachment element 20 via the attachment nose 51 and the closure device 52 and therefore can not be pressed by a force from the bottom upwards. Alternatively, the cover 50 may be formed sufficiently heavy to prevent lifting by the backwater.

The embodiment according to Fig. 1 shows a draining device for liquids, comprising: a base body 10; an attachment element 20, which is connected to the base body 10; an insert member 30, 40 having a housing 30 and a movable closure member 40; wherein the closure member 40 in a first position seals a region of a liquid inlet from a region of a liquid drain, and the closure element 40 is movable from the first position in a first direction to at least one further position which drains liquid from the region of the liquid inlet to the liquid inlet Area of liquid drain allowed; and a cover member 50 which is disposed on the attachment member 20 and is partially permeable to liquid. The drainage device according to the invention for liquids is characterized in that at least one spacer element 31, 32 is arranged between the housing 30 of the insert element 30, 40 and the cover element 50, wherein the at least one spacer element 31, 32 controls a movement of the housing 30 in a second direction, which is opposite to the first direction, prevents. The at least one spacer 31, 32 is provided on the housing 30. The at least one spacer element 31, 32 is formed integrally with the housing 30, in particular as an injection molded part. On the housing 30, two spacers 31, 32 are provided. The housing 30 has a substantially circular shape and the two spacer elements 31, 32 are arranged on two diametrically opposite edge regions.

Fig. 2 shows a second embodiment of the drain device according to the invention for liquids. It shows Fig. 1A an exploded view of the individual components of the drainage device, and the Figs. 1B and 1C show sectional views. The compared to the first embodiment according to Fig. 1 equally contained components are designated by the same reference numerals.

The difference is therefore merely that, instead of the spacer elements 31, 32 of the housing 30 of the first embodiment, spacer elements 51a, 52a are now provided on the cover element 50.

The cover element 50 has a substantially square shape, and the two spacer elements 51a, 52a are arranged on the cover element 50 at two mutually diagonal corner regions.

As in the first embodiment, the cover member 50 includes a fixing lug 51 and a shutter 52, wherein the fixing lug 51 spreads the attachment member 20. The closure device 52 is rotatable for closing the cover element 50 on the attachment element 20 up to a stop 52a provided on the cover element 50. A first of the spacers 51a is formed on the cover member 50 as an extension of the mounting tab 51, and a second of the spacers 52a is formed on the cover member 50 as an extension of the stopper 52a. These spacers are in contact with the edge region of the housing 30.

The function of this second embodiment of the fluid drainage device according to the invention corresponds to that of the first embodiment, as described above. In a backflow of liquid, the spacer elements 51a, 52a act in an analogous manner to the spacers 31, 32 of the first embodiment. A pressing out of the insert element from the attachment element 20 is prevented, and thus also an undesirable flow of liquid from the liquid outlet to the liquid inlet.

The embodiment according to Fig. 2 also shows a draining device for liquids, comprising: a base body 10; an attachment element 20, which is connected to the base body 10; an insert member 30, 40 having a housing 30 and a movable closure member 40; wherein the closure member 40 in a first position seals a region of a liquid inlet from a region of a liquid drain, and the closure element 40 is movable from the first position in a first direction to at least one further position which drains liquid from the region of the liquid inlet to the liquid inlet Area of liquid drain allowed; and a cover member 50 which is disposed on the attachment member 20 and is partially permeable to liquid. The drainage device according to the invention for liquids is characterized in that between the housing 30 of the insert element 30, 40 and the Covering element 50 at least one spacer element 51a, 52a is arranged, wherein the at least one spacer element 51a, 52a prevents movement of the housing 30 in a second direction, which is opposite to the first direction. The at least one spacer element 51 a, 52 a is arranged on the cover element 50. In particular, two spacer elements 51a, 52a are arranged on the cover element 50. The cover element 50 has a substantially rectangular shape, in particular a substantially square shape, and the two spacer elements 51a, 52a are arranged on the cover element 50 at two mutually diagonal corner regions. Alternatively, the cover 50 may have a substantially circular shape and the two spacer elements 51a, 52a may be arranged on the cover 50 at two opposite edge regions on a diameter.

The cover member 50 has a fastening lug 51 and a closure device 52, wherein the attachment lug 51 spreads in the attachment element 20, the closure means 52 for closing the cover member 50 on the attachment member 20 is rotatable to a provided on the cover member 50 stop 52a, and According to the invention, in the second embodiment, a first of the spacer elements 51a is formed on the cover member 50 as an extension of the attachment tab 51, and a second of the spacer members 52a is formed on the cover member 50 as an extension of the stopper 52a.

According to a third drainage device according to the invention, not shown in the figures, exactly one spacer element is arranged on the housing according to the first embodiment, and exactly one spacer element is provided on the cover element according to the second embodiment (either the spacer element 51a or the spacer element 52a). The housing has a substantially circular shape, and the two spacer elements are arranged between two diametrically opposite edge regions of the housing and the cover.

Claims (12)

Drain device for liquids, comprising: a main body (10); an attachment element (20) connected to the base body (10), the base body (10) having a first sealing ring (61) which seals the connection with the attachment element (20); an insert member (30, 40) having a housing (30) and a movable closure member (40), the housing (30) of the insert member (30, 40) having a second sealing ring (62) interconnecting the housing (30); 30) with the attachment element (20) seals; wherein the closure member (40) in a first position seals a region of a liquid inlet from a region of a liquid drain, and the closure element (40) is movable from the first position in a first direction to at least one further position which is drainage of liquid from the region allows the liquid inlet to the region of the liquid drain; and a cover member (50) disposed on the attachment member (20) and partially permeable to liquid; characterized, in that at least one spacer element (31, 32; 51a, 52a) is arranged between the housing (30) of the insert element (30, 40) and the cover element (50), the at least one spacer element (31, 32; 51a, 52a) being a Movement of the housing (30) in a second direction, which is opposite to the first direction, prevented. A drainage device according to claim 1, wherein the at least one spacer element (31, 32) is provided on the housing (30). Drainage device according to claim 2, wherein the at least one spacer element (31, 32) is formed integrally with the housing (30), in particular as an injection molded part. Drainage device according to claim 2 or 3, wherein on the housing (30) has two or more spacer elements (31, 32) are provided. A draining device according to claim 4, wherein the housing (30) has a substantially round shape and the two or more spacer elements (31, 32) are arranged so as to prevent movement of the housing (30) in the second direction. A drainage device according to claim 1, wherein the at least one spacer element (51a, 52a) is arranged on the cover element (50). Drainage device according to claim 6, wherein two spacer elements (51a, 52a) are arranged on the cover element (50). Drainage device according to claim 7, wherein the cover (50) has a substantially rectangular shape, in particular a substantially square shape, and the two spacer elements (51a, 52a) are arranged on the cover (50) at two mutually diagonal corner regions. Drainage device according to claim 7, wherein the cover (50) has a substantially circular shape and the two spacer elements (51a, 52a) are arranged on the cover (50) on two diametrically opposite edge regions. The draining device according to one of claims 5 to 9, wherein the cover element (50) has a fastening nose (51) and a closure device (52), the fastening nose (51) spreads into the attachment element (20), the closure device (52) for closing the attachment Cover member (50) on the attachment element (20) to a provided on the cover (50) stop (52a) is rotatable, and a first of the spacer elements (51a) on the cover (50) as an extension of the attachment nose (51) and a second of the Spacer elements (52a) on the cover (50) as an extension of the stop (52a) are formed. Drainage device according to claim 2 or 3, wherein a spacer element is arranged on the housing (30) and a spacer element is provided on the cover element (50). Drainage device according to claim 11, wherein the housing (30) has a substantially circular shape and the two spacer elements between two diametrically opposite edge regions of the housing and the cover are arranged.

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