Outlet bend
The discharge bend addresses flow loss issues in wastewater systems by using a guide wall design that minimizes rotational movements and optimizes flow direction, enhancing hydraulic efficiency.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- GEBERIT INT AG
- Filing Date
- 2026-01-13
- Publication Date
- 2026-07-23
AI Technical Summary
Outlet bends in wastewater systems experience flow losses due to rotational movements caused by the entry of flushing water, particularly in toilet bowls and urinals, leading to inefficient discharge.
A discharge bend design with a first pipe section, a deflection section, and a second pipe section, featuring guide walls that minimize flow losses by guiding the flow medium with a decreasing transverse distance from the pipe sections, allowing installation at various angles and preventing rotational movements.
The design enhances hydraulic efficiency by minimizing flow losses and ensuring smooth discharge, even when installed at angles, thus optimizing the flow of multiphase media.
Smart Images
Figure EP2026050667_23072026_PF_FP_ABST
Abstract
Description
[0001] TITLE
[0002] EXIT ARCH
[0003] TECHNICAL AREA
[0004] The present invention relates to a drain bend for a sanitary article, in particular for a toilet bowl or a urinal, according to claim 1, a use of the drain bend according to claim 23 and a sanitary arrangement according to claim 24.
[0005] STATE OF THE ART
[0006] Outlet bends are known from the prior art. Outlet bends are pipe sections arranged in a wastewater line that carries wastewater away from a sanitary fixture. Such outlet bends have a first pipe section and a second pipe section, which is usually at a 90° angle to the first pipe section. The first pipe section typically provides an insertion point into which a pipe section connected to the sanitary fixture can be inserted. If the sanitary fixture is in the form of a toilet, the outlet bend is often installed so that the second pipe section is inclined at an angle to the vertical. When the flushing water enters the second pipe section, this can cause a rotational movement within the second pipe section, leading to flow losses. This minimizes the flushing efficiency.
[0007] PRESENTATION OF THE INVENTION
[0008] Based on this prior art, the invention is based on the objective of providing a discharge bend that overcomes the disadvantages of the prior art. In particular, the present invention is based on the objective of providing a discharge bend with improved hydraulic properties.
[0009] The outlet bend according to claim 1 solves these and other problems. Accordingly, the outlet bend serves to discharge a multiphase flow medium, in particular water, solids, and air. The outlet bend comprises a first pipe section extending along a first central axis, a deflection section adjoining this first pipe section with an outer deflection surface and an inner deflection surface, which deflection section extends along a deflection axis and deflects the flow medium relative to the first pipe section, and a second pipe section adjoining the deflection section, which extends along a second central axis. The first central axis and the second central axis run at an angle of 80 to 100°, in particular at an angle of 90°, to each other. In the installed position, the first central axis runs perpendicular to the vertical direction.The outlet bend further comprises at least one guide wall extending into the cross-section of the outlet bend, with at least one side surface. This at least one side surface has a surface segment arranged such that the transverse distance between the surface segment and the first central axis, the deflection axis, or the second central axis decreases with increasing distance from the first pipe section to the second pipe section, viewed perpendicular to the respective axis.
[0010] In other words, the surface section is designed in such a way that, as the distance from the first pipe section increases, it approaches the respective axis when viewed in the transverse direction.
[0011] Depending on the installation position of the outlet bend, the at least one guide wall with the aforementioned surface area offers different advantages. In principle, the at least one guide wall is arranged in such a way that the flow medium is guided through the outlet bend with minimal flow losses.
[0012] If the outlet bend is installed so that the second central axis runs vertically, preferably two opposing side surfaces, each with a surface section, are arranged or effective. In this case, the orientation of the side surfaces provides guidance for the flow medium in the direction of the vertical. The flow medium is thereby concentrated in the flow direction by the surface sections in the deflection section and / or in the second pipe section, guided by the side sections in the first pipe section. This prevents sloshing against the flow direction.
[0013] If the outlet bend is installed such that the second central axis runs at an angle to the vertical, the guide section of the side surface provides a guide for the flowing medium, thus preventing the flowing medium from splashing up against the vertical direction in the outlet bend. This prevents rotation or partial rotation of the flowing medium around the deflection axis or the second central axis, thereby minimizing flow losses. The design with the decreasing transverse spacing offers the advantage of a smooth and flow-optimized introduction of the flowing medium into the second pipe section.
[0014] The first central axis and the second central axis run along a geometric straight line, and the deflection axis runs along a geometric arc, in particular along a circular arc.
[0015] The outlet bend also offers the advantage of being installable in various situations. In particular, in installations where the second central axis is inclined at an angle to the vertical, the hydraulic flow rate can be increased compared to conventional outlet bends.
[0016] The transverse distance is the distance between one of the aforementioned axes and the surface section viewed in the transverse direction to the respective axis. The transverse distance runs perpendicular to a median plane spanned by the first median axis, the deflection axis, and the second median axis.
[0017] The surface section preferably forms a sub-area of the guide wall. However, the surface section can also provide the guide wall as a whole.
[0018] In one variant, the surface section is concavely curved.
[0019] In a second variant, the surface section is oriented obliquely to the flow direction. In other words, the surface section is inclined at an angle to the flow direction.
[0020] Preferably, the side surface has at least one wall section formed with a flat surface, wherein such a wall section is arranged upstream of the surface section when viewed in the flow direction of the fluid and / or wherein such a wall section is arranged downstream of the surface section when viewed in the flow direction of the fluid. The fluid can be guided at least partially onto the surface section by these wall sections.
[0021] Preferably, two of the aforementioned guide walls are arranged, wherein the side surfaces of the guide wall are symmetrical with respect to a central plane spanned by the two central axes and the deflection axis. Thus, two side surfaces are provided which converge in the flow direction. The transverse distance between the two side surfaces corresponds to twice the transverse distance between the respective side surface and the respective axis.
[0022] Preferably, the guide walls are of the same or identical design. This has the advantage that the outlet bend is symmetrical, allowing installation at various angles between the vertical direction and the second central axis. Thus, the outlet bend can be installed at an angle to one side of the vertical direction or at an angle to the other side of the vertical direction.
[0023] In a first embodiment, two of the aforementioned guide walls are arranged. The two guide walls are connected to an end wall. The end wall adjoins the end faces of the guide walls. Preferably, the end wall extends over the entire length of the side faces.
[0024] In a second embodiment, two of the aforementioned guide walls are arranged, and a channel section lies between the two guide walls. The channel section itself also provides guidance for the flow medium.
[0025] Preferably, at least one guide wall is arranged in the deflection section on the outside of the deflection and / or in the second pipe section.
[0026] Preferably, the at least one guide wall is arranged exclusively on the outer side of the deflection and not on the inner side of the deflection.
[0027] Viewed in its installed position, the outlet bend is preferably positioned such that, viewed from the perpendicular, the outer side of the deflection lies largely above the inner side of the deflection. Preferably, the at least one guide wall has a front end and a rear end.
[0028] In one variant, the lateral distance between the two front ends is maximized. This lateral distance minimizes with increasing distance from the front end, in particular to the point where the two side surfaces form a common rear end.
[0029] In another variant, both the front ends and the rear ends are positioned at a lateral distance from each other, with the lateral distance between the rear ends being smaller than the lateral distance between the front ends.
[0030] Preferably, the front ends lie above a plane which extends through the first central axis and which is perpendicular to the second central axis.
[0031] In a first variant, in which the guide wall is arranged in the deflection section and in the second pipe section, the front end is located in the deflection section and the rear end is located in the second pipe section.
[0032] Preferably, according to the first variant, the front end is located directly at the transition from the first pipe section to the deflection section. Preferably, the rear end is located at a distance from the transition of the first pipe section to the deflection section. Preferably, this distance corresponds approximately to the pipe diameter or half the pipe diameter in the second pipe section.
[0033] In the first variant, at least one guide wall extends exclusively from the deflection section into the second pipe section.
[0034] In a second variant, where the guide wall is located in the deflection section, the front and rear ends are situated within the deflection section. In a third variant, where the guide wall is located in the second pipe section, the front and rear ends are situated within the second pipe section.
[0035] In both variants, at least one guide wall preferably does not extend into the first pipe section. In a further development, the rear end is chamfered.
[0036] The bevel can have the advantage that, in the event of cleaning, a cleaning tool does not get stuck on at least one guide wall.
[0037] Preferably, the chamfer has a first chamfer section and a second chamfer section. The first chamfer section lies on one side of a median plane spanned by the two central axes and the deflection axis, and the second chamfer section lies on the other side of the median plane.
[0038] Preferably, the two chamfered sections are inclined at an angle to each other. In one variant, the angle opens towards the end of the second pipe section. In a second variant, the angle closes towards the end of the second pipe section.
[0039] Preferably, the at least one guide wall extends from an inner surface of the deflection section or from an inner surface of the second pipe section into the interior of the outlet bend.
[0040] In a third variant, in which the guide wall is arranged in the first pipe section, in the deflection section and in the second pipe section, the front end is located in the first pipe section and the rear end is located in the second pipe section.
[0041] In one variant, at least one guide wall is in contact with the respective inner surface along its entire length. In another variant, at least one guide wall is in contact with the respective inner surface over at least a first section of its entire length, and over at least a second section, the at least one guide wall is set back from the respective inner surface in such a way that a gap is created between the guide wall and the respective inner surface.
[0042] Preferably, the gap is located in the region of the rear end of the guide wall. Here, the gap has the advantage that when cutting or shortening the second pipe section in an area where the guide wall is present, the guide element can remain in place while still providing good access for a welding mirror. Preferably, the height of the at least one guide wall increases continuously at right angles from an inner surface of the deflection section in a first arc segment of the deflection section and is essentially constant in a second arc segment of the deflection section. Preferably, the first arc segment extends over a length range of one-fifth to half of the total length of the deflection section. Alternatively, the first arc segment preferably extends over a length range of one-third to half of the total length of the deflection section.In other words, the height of the guide wall increases continuously from the front end, creating a structure that only slightly alters the inlet area into the deflection section, thus preventing blockages in this area.
[0043] The design of at least one guide wall in the deflection section has the advantage that pipe cleaning devices can be easily inserted into the deflection section via the first pipe section.
[0044] Preferably, the at least one guide wall in the second pipe section has a substantially constant height over a first subsection, viewed perpendicularly from an inner surface of the second pipe section. In a second subsection, the at least one guide wall runs at an angle of 35° to 65°, particularly 40° to 50°, to the inner surface, so that the height of the guide wall decreases continuously in the second subsection.
[0045] The design of at least one guide wall in the second pipe section has the advantage that pipe cleaning equipment can easily slide into the area of the guide walls after the pipe cleaning has been completed from the second pipe section.
[0046] A "substantially constant height" is understood to mean a height which, for manufacturing reasons, is provided with a slight adjustment for demolding.
[0047] Preferably, the at least one guide wall in the deflection section and / or in the second pipe section, viewed perpendicularly to the aforementioned inner surfaces, has a maximum height of 30% of the diameter of the deflection section and / or the second pipe section. Preferably, viewed in a central plane passing through the two central axes, the deflection section extends in an arc-shaped, and in particular circular arc-shaped, form on the outer side of the deflection.
[0048] Viewed in a central plane passing through the two central axes, the deflection section on the inside of the deflection is preferably designed as a deflection edge.
[0049] Preferably, the at least one guide wall is integrally formed on the inner surface of the deflection section and the inner surface of the second pipe section. Alternatively, the at least one guide wall can be integrally formed on an insert that can be inserted into the deflection section and the second pipe section.
[0050] Preferably, the first pipe section has a stop surface which, viewed in the flow direction of the fluid, is arranged upstream of the deflection section and upstream of the at least one guide wall. The stop surface is preferably designed as a circular ring and rests against a shoulder in the first pipe section. The stop surface is preferably located at a distance from the transition of the first pipe section into the deflection section.
[0051] Particularly preferably, the first pipe section and / or the second pipe section have a cylindrical, in particular a circular cylindrical, cross-section.
[0052] Preferably, the at least one guide wall defines a portion of a cavity towards the interior of the outlet bend. Preferably, the cavity is open at the rear end of the at least one guide wall. Preferably, the cavity is closed off on the side facing the interior by the wall of the first pipe section and / or the deflection section and / or the second pipe section.
[0053] In a further development, the surface area is defined by a first edge and a second edge. The first and second edges extend from the endpoints of an arc segment located on the inner surface of the first pipe segment or the deflection section. The second edge extends from said endpoint, at least section by section, with an increasing distance from the inner surface towards the second pipe segment. The first edge extends along the inner surface of the first pipe segment and / or the deflection section and / or the second pipe segment.
[0054] By stretching the surface section in this way, a surface section is created that twists in the flow direction of the multiphase flow medium, which deflects the multiphase flow medium with minimal loss.
[0055] Preferably, the first edge and / or the second edge run such that the transverse distance between the first edge or second edge and the first central axis or the deflection axis or the second central axis, viewed perpendicular to the respective axis, decreases with increasing distance from the first pipe section to the second pipe section.
[0056] Preferably, the distance between the first edge and the second edge decreases, at least section by section, as viewed perpendicularly to the first edge and / or the second edge, with increasing distance from the first pipe section.
[0057] The following section describes further optional features of the exit bow:
[0058] The outlet bend, i.e., the first pipe section, the deflection section, and the second pipe section are preferably formed in one piece. The deflection pipe section is particularly preferably made of plastic, especially by a blow molding or injection molding process.
[0059] Preferably, the aforementioned pipe sections have a cylindrical portion. One or both of these cylindrical portions can be designed as a socket for inserting a pipe or for welding a pipe to it. Alternatively, one or both of the cylindrical portions can be designed as a surface for inserting into a pipe socket or for welding a pipe to it.
[0060] In its operating state, the fluid flows in the outlet bend in such a way that it does not completely fill the cross-section, but essentially half or less. This is a partially filled pipe section that can be used in a partially filled pipe system.
[0061] Preferably, the diameters of the first pipe section and / or the second pipe section are in the range of 75 to 110 millimeters. Preferably, an angle, viewed in cross-section transversely to the deflection axis and / or transversely to the second central axis, between the at least one side surface and a tangent extending tangentially to the inner surface of the deflection section and / or the second pipe section and through the intersection between the respective side surface and the respective inner surface, is in the range of 40° to 90°. The described design with the minimum angle of 40° has the advantage that jamming of solids between the inner surface and the side surface can be prevented. The angle also changes depending on the position of the respective guide wall. If the guide wall lies on the central plane, the angle is approximately 90°. With increasing distance from the central plane, the angle decreases.When multiple guide surfaces are arranged, each of the guide surfaces has a different angle.
[0062] In the first type of use of a drain bend as described above in connection with a sanitary fixture, such as a toilet bowl or urinal, the first central axis, viewed from the installed position of the drain bend, runs perpendicular to the vertical direction, and the second central axis runs parallel to the vertical direction. The orientation of the drain bend is such that the flow medium flows through the first pipe section into the bend section and is channeled in the bend section by at least one guide wall in the direction of the vertical direction.
[0063] In a second type of application of a drain bend as described above, in connection with a sanitary fixture such as a toilet bowl or urinal, the first central axis, viewed from the installed position of the drain bend, runs perpendicular to the vertical direction, and the second central axis runs at an angle to the vertical direction. The drain bend is oriented such that the flow medium flows through the first pipe section into the deflection section and, in the deflection section, is prevented from flowing upwards against the vertical direction by at least one guide wall and is deflected towards the second pipe section.
[0064] A sanitary arrangement comprises a drain bend as described above and a sanitary fixture, such as a toilet bowl or urinal, with a connection point for attaching the drain bend or a connection point for attaching a pipe section that then leads into the drain bend. In a first variant, viewed in the installed position of the drain bend, the first central axis runs essentially perpendicular to the vertical direction, and the second central axis runs essentially parallel to the vertical direction. The drain bend is oriented such that the flow medium flows through the first pipe section into the deflection section and is channeled in the deflection section by at least one guide wall in the direction of the vertical direction. In a second variant, viewed in the installed position of the drain bend, the first central axis runs essentially perpendicular to the vertical direction, and the second central axis runs at an angle inclined to the vertical direction.The orientation of the outlet bend is such that the flow medium flows through the first pipe section into the deflection section and in the deflection section is prevented from flowing upwards against the vertical direction by the at least one guide wall and is deflected in the direction of the second pipe section.
[0065] This plumbing design offers the advantage that the guide walls are relatively close to the plumbing fixture when installed. In the unlikely event of a blockage, the interior of the drain bend is easily accessible with the fixture removed.
[0066] Preferably, the outlet bend is in direct and immediate contact with the sanitary fitting. Alternatively, a pipe section is provided between the outlet bend and the sanitary fitting. Preferably, the length of this pipe section is between 50 and 200 millimeters. This means that the first section of the diverting pipe is spaced this length away from the sanitary fitting.
[0067] Further embodiments are specified in the dependent claims.
[0068] BRIEF DESCRIPTION OF THE DRAWINGS
[0069] Preferred embodiments of the invention are described below with reference to the drawings, which serve only for illustration and are not to be interpreted restrictively. The drawings show:
[0070] Fig. 1 shows a side view of a preferred first embodiment of a discharge arc of the present invention;
[0071] Fig. 2 shows a perspective sectional view of the exit arc according to Figure 1 in a first variant of an installation position;
[0072] Fig. 3 shows a sectional view of the exit arc according to Figures 1 and 2;
[0073] Fig. 4 shows a front view of the exit arch according to the preceding figures in the direction of a first central axis;
[0074] Fig. 5 shows a perspective sectional view of the exit arc according to the preceding figures in a second variant of an installation position;
[0075] Fig. 6 shows a side view of a preferred second embodiment of a discharge arc of the present invention;
[0076] Fig. 7 shows a perspective sectional view of the exit arc according to Figure 6 in a first variant of an installation position;
[0077] Fig. 8 shows a sectional view of the exit arc according to Figures 6 and 7;
[0078] Fig. 9 shows a front view of the exit arch according to the preceding figures in the direction of a first central axis;
[0079] Fig. 10 shows a perspective sectional view of the outlet bend according to the preceding Figures 6 to 9 in a second variant of an installation position; Fig. 11a / b shows sectional views of a preferred embodiment of an outlet bend of the present invention;
[0080] Fig. 12a / b Sectional views of a preferred embodiment of a discharge arc of the present invention;
[0081] Fig. 13a / b / c Sectional views of a preferred embodiment of a discharge arc of the present invention; and
[0082] Fig. 14a / b Sectional views of a preferred embodiment of a discharge arc of the present invention.
[0083] DESCRIPTION OF PREFERRED EXECUTION FORMS
[0084] Figures 1 to 5 show a first embodiment of a discharge bend 1 according to the present invention, and Figures 6 to 10 show a second embodiment of a discharge bend 1 according to the present invention. Identical parts are identified by the same reference numerals. The discharge bend 1 serves to discharge a multiphase flow medium, which consists in particular of water, solids, and air. The discharge bend 1 is located in a wastewater pipe between a sanitary fixture and other pipes. The discharge bend 1 deflects the flow medium from a horizontal flow direction to a vertical direction or at an angle to the vertical direction.
[0085] The outlet bend 1 comprises a first pipe section 2, a deflection section 3 adjoining this first pipe section 2, and a second pipe section 6 adjoining the deflection section 3. The first pipe section 2, the deflection section 3, and the second pipe section 6 together form the pipe section 1 and define an interior space 14 through which the fluid flows. The fluid flows along a flow direction F from the first pipe section 2 through the deflection section 3 and finally through the second pipe section 6.
[0086] The first pipe section 2 extends along a first central axis M1. The first central axis M1 extends along a straight line.
[0087] The deflection section 3 has an outer deflection side 4 and an inner deflection side 5. The deflection section 3 extends along a deflection axis U, which is arc-shaped, in particular circular arc-shaped. In the deflection section 3, the flow medium is deflected relative to the first pipe section 2.
[0088] The second pipe section 6 extends along a second central axis M2. The second central axis M2 extends along a straight line. The first central axis M1 and the second central axis M2 are at an angle of 90° to each other. The deflection axis U connects the first central axis M1 and the second central axis M2. In the installed position, the first central axis M1 runs horizontally, i.e., perpendicular to the vertical direction L.
[0089] Figures 3 and 8 show that, viewed in a central plane ME passing through the two central axes M1, M2, the deflection section 3 on the outer deflection side 4 runs in an arc 23, in particular in a circular arc shape; and that the deflection section 3 on the inner deflection side 5 is designed as a deflection edge 24.
[0090] Figures 2 to 5 and 7 to 10 further show that the outlet bend 1 has at least one guide wall 7 extending into the cross-section of the outlet bend 1, with a side surface. The at least one guide wall 7 extends into the interior 14 in such a way that the flow medium is guided through the at least one guide wall 7. The guide wall 7 is arranged in the deflection section 3 on the outer side 4 of the deflection and in the second pipe section 6. In other words, the guide wall 7 extends from the deflection section 3 into the second pipe section 6. Other embodiments in which the guide wall is arranged either only in the deflection section 3 or only in the second pipe section 6 are also conceivable. It is also conceivable that the guide wall 7 is arranged in the first pipe section 2, in the deflection section 3, and in the second pipe section 6.In both embodiments, two guide walls 7 are provided, each having a side surface 8. The side surface 8 has a surface section 9. In the embodiment shown, the surface section 9 is concavely curved. The concave curvature is clearly visible in Figures 4 and 9. In general terms, the surface section 9 is arranged such that a transverse distance Q between the surface section 9 and the first central axis M1, the deflection axis U, or the second central axis M2, viewed perpendicular to the respective axis M1, U, M2, decreases with increasing distance from the first pipe section 2 to the second pipe section 6. In Figures 4 and 9, the transverse distances Q are shown twice. The fluid flows downwards in Figures 4 and 9. The flow direction is indicated by the reference numeral F.
[0091] The transverse distance Q is, as mentioned, the distance between surface section 9 and the respective axis M1, U, M2. The transverse distance Q is oriented perpendicular to a median plane ME, which is spanned by the respective axes M1, U, M2.
[0092] In other embodiments not shown in the figures, the said surface section can also be inclined at an angle to the respective axes.
[0093] The at least one guide wall 7 extends from an inner surface 12 of the deflection section 3 and from an inner surface 13 of the second pipe section 6 into the interior 14 of the outlet bend 1. The at least one guide wall 7 is preferably an integral part of the outlet bend.
[0094] Figures 2 to 5 and 7 to 10 further show that in both embodiments, the side surface 8 has at least one wall section 32 formed with a flat surface. The wall section 32 is optional. In the illustrated embodiments, one such wall section 32 is arranged upstream of the surface section 9 in the flow direction F of the fluid, and another wall section 32 is arranged downstream of the surface section 9 in the flow direction F of the fluid.
[0095] In both embodiments, two of the aforementioned guide walls 7 are arranged. The side surfaces of the guide walls 7 are arranged symmetrically with respect to the aforementioned central plane ME. Furthermore, the two guide walls 7 are each located at an equal distance from the aforementioned central plane ME.
[0096] In the first embodiment according to Figures 1 to 6, two of the aforementioned guide walls 7 are arranged. The guide walls 7 are connected to each other via an end wall 33. The end wall 33 abuts the end faces 17 of the guide walls 7.
[0097] In the second embodiment according to Figures 7 to 12, two of the aforementioned guide walls 7 are arranged. A channel section 34 lies between the two guide walls 7.
[0098] Figure 2 shows that the at least one guide wall 7 has a front end 10 and a rear end 11. The front end 10 is located in the deflection section 3, and the rear end 11 is located in the second pipe section 6. The front end 10 is located essentially directly at the transition area 28 from the first pipe section 2 to the deflection section 3. Alternatively, the front end 10 can also be arranged in the deflection section 3 with an offset from this transition area 28. The rear end 11 is located at a distance from the transition area from the deflection section 3 to the second pipe section 6.
[0099] In the first embodiment, the lateral distance Q between the two front ends 10 is at its maximum. With increasing distance from the front end 10, the lateral distance is minimized. According to the first embodiment, the lateral distance is minimized such that the two side walls 8 form a common rear end 11. In the second embodiment, both the front ends 10 and the rear ends 11 are positioned at a lateral distance from each other, with the lateral distance between the rear ends 11 being smaller than the lateral distance between the front ends 10.
[0100] Figures 4 and 9 further show that the front end 10 lies above a plane which extends through the first central axis M1 and which is perpendicular to the second central axis M2. This plane is designated by the reference symbol E.
[0101] The height of the at least one guide wall 7, viewed perpendicularly from an inner surface 12 of the deflection section 3, is preferably selected as follows: In a first arc section 19 of the deflection section 3, the height increases continuously. In a second arc section 20 of the deflection section 3, the height is essentially constant. In other words, the height of the guide wall increases continuously from the front end 10 through the first arc section 19 and is then essentially constant in the second arc section. Preferably, the first arc section 19 extends over a length range of one-fifth to half the total length of the deflection section 3 or over a length range of one-third to half the total length of the deflection section 3.
[0102] In the second pipe section 6, the at least one guide wall 7 has a substantially constant height over a first subsection 21, viewed perpendicularly from an inner surface 13 of the second pipe section 6. In a second subsection 22, the at least one guide wall 7 runs at an angle in the range of 35° to 65°, particularly in the range of 40° to 50°, to the inner surface 13, so that the height of the guide wall 7 decreases continuously in the second subsection 22.
[0103] Viewed in cross-section transversely to the deflection axis U and / or transversely to the second central axis M2, the guide wall 7 is at an angle α, α perpendicular to a tangent T. The tangent T extends tangentially to the respective inner surfaces 12, 13 of the deflection section 3 and / or the second pipe section 6 and through the intersection between the respective side surface 8 and the respective inner surface 12, 13. The angle α, α is preferably in the range of 40° to 90°. The minimal angle in this range has the advantage that solids cannot become wedged, or can become less likely to become wedged, between the inner surface and the side surface.
[0104] Figures 2 and 7 show a first use of the outlet bend 1 as the outlet bend 1 of a sanitary fixture, such as a toilet bowl or a urinal. In this first use, when viewed in the installed position of the outlet bend 1, the first central axis M1 runs perpendicular to the vertical direction L. The second central axis M2 runs in the vertical direction L. The arrangement of the outlet bend 1 is such that the flow medium flows through the first pipe section 2 into the deflection section 3 and is channeled in the deflection section 3 by the at least one guide wall 7 in the direction of the vertical direction L.
[0105] Figures 5 and 10 show a second use of the outlet bend 1 as the outlet bend 1 of a sanitary fixture, such as a toilet bowl or a urinal. In this second use, when viewed in the installed position of the outlet bend 1, the first central axis M1 runs perpendicular to the vertical direction L. The second central axis M2 is inclined at an angle β to the vertical direction L. The arrangement of the outlet bend 1 is such that the flow medium flows through the first pipe section 2 into the deflection section 3 and, in the deflection section 3, is prevented from flowing upwards against the vertical direction L by the at least one guide wall 7 and is deflected towards the second pipe section 6. This prevents the flow medium from rotating around the second central axis M2 during the course of the second pipe section 6 due to the deflection in the deflection section 3.
[0106] The first pipe section 2 also has a receiving groove 25 for receiving a seal. Furthermore, the first pipe section 2 has a stop surface 26. Viewed in the flow direction of the fluid, the stop surface 26 is located upstream of the deflection section 3 and upstream of the at least one guide wall 7. Upstream of the stop surface 26, the second pipe section has an insertion area 27 into which a pipe section can be inserted. The pipe section, which projects into the insertion area 27 of the first pipe section 2, can abut the stop surface 26. The stop surface 26 is arranged such that the pipe section cannot be inserted far enough to come into contact with the at least one guide wall 7.
[0107] In the second pipe section 6, the guide wall 7 can be slightly offset from the inner surface 13. This creates a gap 29 between the guide wall 7 and the inner surface 13. Over a first partial section 30 of its length, the guide wall 7 is firmly in contact with the respective inner surfaces 12 and 13. In a second partial section 31, here in the second pipe section 6, the guide wall 7 is offset from the respective inner surfaces 12 and 13, so that the aforementioned gap 29 is formed.
[0108] Figures 11a to 14d show preferred embodiments of the present invention. The features of the embodiment shown can be configured with the channel section 34, as shown and as in the second embodiment, or without the channel section, as in the first embodiment.
[0109] In the further development shown in Figures 11a to 12b, the rear end 11 is chamfered with a bevel 35. The bevel 35 can also be arranged in all other embodiments described herein.
[0110] Preferably, the chamfer 35 has a first chamfer section 36 and a second chamfer section 37. The two chamfer sections 36, 37 are arranged opposite each other. That is, the first chamfer section 36 lies on one side of a median plane ME spanned by the two central axes M1, M2 and the deflection axis U, and the second chamfer section 37 lies on the other side of the median plane ME. If the channel section 34 is present, the two chamfer sections 36, 37 are located to the left and right of the channel section 34, respectively.
[0111] Preferably, the two chamfer sections 36, 37 are inclined at an angle to each other.
[0112] In a first variant, as shown in Figures 11a and 11b, the angle opens towards the end of the second pipe section. In a second variant, as shown in Figures 12a and 12b, the angle closes towards the end of the second pipe section.
[0113] In the further developments of Figures 11a to 13c, the at least one guide wall 7 limits part of a cavity 38 towards the interior 14 of the exit arch 1.
[0114] The cavity 38 is open at the rear end 11 of the at least one guide wall 7. On the side facing the interior of the outlet bend 1, the cavity 38 is closed off by the wall of the first pipe section 2 and / or the deflection section 3 and / or the second pipe section 6.
[0115] The cavity 38 of the aforementioned canal section 33 is here bounded by a further wall surface 39.
[0116] In the further development according to Figures 13a to 13c, an alternative form of the surface section 9 is shown. The surface section 9 is spanned by a first edge 40 and a second edge 41. The first edge 40 and the second edge 41 extend from endpoints P of an arc section B, which lies on the inner surface of the first pipe section 2 or the deflection section 3. The arc section B is a virtual line on the inner surface of the outlet arc 1. The second edge 41 extends from the aforementioned endpoint P, at least section by section, with an increasing distance from the inner surface, in the direction of the second pipe section 6. The first edge 40 extends on the inner surface of the first pipe section 2 and / or the deflection section 3 and / or the second pipe section 6.
[0117] With respect to the aforementioned intermediate plane ME, the first edge 40 is closer to the intermediate plane ME than the second edge 41.
[0118] Preferably, the distance between the first edge 40 and the second edge 41 decreases, at least section by section, as viewed perpendicularly to the first edge 40 and / or the second edge 41, with increasing distance to the first pipe section 2.
[0119] Figures 14a / 14b show a further development of the aforementioned flat wall section 32. Here, the flat wall section 32 is provided by a wall with a small wall thickness. A small wall thickness is preferably understood to be in the range of 0.5 to 10 millimeters. REFERENCE SYMBOL LIST
[0120] 1 Exit form
[0121] 2 first pipe section
[0122] 3 Deflection section
[0123] 4 Deflection side
[0124] 5 Deflection inside
[0125] 6 second pipe section
[0126] 7 Guide wall
[0127] 8 side surface
[0128] 9 Area section
[0129] 10 front end
[0130] 11 rear end
[0131] 12 interior surface area of 3
[0132] 13 interior surface area of 6
[0133] 14 Interior
[0134] 17 Front surface
[0135] 19 first arc section
[0136] 20 second arc section
[0137] 21 first subsection
[0138] 22 second subsection
[0139] 23 sheets
[0140] 24 Deflection edge
[0141] 25 recordings
[0142] 26 Stop surface
[0143] 27 Insertion area
[0144] 28 Transition area
[0145] 29 gap
[0146] 30 first sub-area
[0147] 31 second sub-area
[0148] 32 flat wall section
[0149] 33 Front wall
[0150] 34 Canal section
[0151] 35 Bevel
[0152] 36 first chamfer section
[0153] 37 second chamfer section
[0154] 38 Cavity
[0155] 39 additional wall space 40 first edge
[0156] 41 second edge
[0157] M1 first central axis M2 second central axis U deflection axis ME middle plane
[0158] Level E
[0159] L plumb line
[0160] Q Lateral spacing
[0161] A distance
[0162] Level E
[0163] Key points
[0164] B arc section
Claims
22 PATENT CLAIMS 1. Outlet bend (1) for discharging a multiphase flow medium, in particular consisting of water, solids and air, comprising a first pipe section (2) extending along a first central axis (M1), a deflection section (3) adjoining this first pipe section (2) with a deflection outer side (4) and a deflection inner side (5), which deflection section (3) extends along a deflection axis (U) and deflects the flow medium with respect to the first pipe section (2), a second pipe section (6) adjoining the deflection section (3), which extends along a second central axis (M2), wherein the first central axis (M1) and the second central axis (M2) run at an angle in the range of 80° to 100°, in particular at an angle of 90° to each other and the first central axis (M1) runs substantially perpendicular to the vertical direction (L) in the installed position, wherein the outlet arc (1) further comprises at least one guide wall (7) extending into the cross-section of the outlet arc (1) with at least one side surface (8), and wherein the at least one side surface (8) has a surface section (9) which is arranged such that a transverse distance (Q) between the surface section (9) and the first central axis (M1) or the deflection axis (U) or the second central axis (M2) decreases with increasing distance in the course from the first pipe section (2) to the second pipe section (6) perpendicular to the respective axis (M1, U, M2).
2. Exit arc (1) according to claim 1, characterized in that the surface section (9) is concavely curved.
3. Outlet bend (1) according to claim 1 or 2, characterized in that the surface section (9) is oriented obliquely to the flow direction.
4. Exit arch (1) according to one of the preceding claims, characterized in that the side surface (8) has at least one wall section (32) formed with a flat surface, wherein such a wall section (32) is arranged in the direction of flow of the flow medium in front of said surface section (9) and / or wherein such a wall section (32) is arranged downstream of said surface section (9) in the direction of flow of the fluid; and / or wherein such a wall section (32) is provided by a wall with a small wall thickness.
5. Exit arc (1) according to one of the preceding claims, characterized in that two of the aforementioned guide walls (7) are arranged, wherein the side surfaces (8) are symmetrically formed with respect to a central plane (ME) spanned by the two central axes (M1, M2) and the deflection axis (U).
6. Exit bend (1) according to one of the preceding claims 1 to 5, characterized in that two of the aforementioned guide walls (7) are arranged, wherein the guide walls (7) are connected to an end wall (33), wherein the end wall (33) adjoins the end faces (17) of the guide walls (7).
7. Outlet bend (1) according to one of the preceding claims 1 to 5, characterized in that two of the aforementioned guide walls (7) are arranged, wherein a channel section (34) lies between the two guide walls (7).
8. Outlet bend (1) according to one of the preceding claims, characterized in that the guide wall (7) is arranged in the deflection section (3) on the deflection outer side (4) and / or in the second pipe section (6).
9. Exit bend (1) according to one of the preceding claims, characterized in that the at least one guide wall (7) has a front end (10) and a rear end (11).
10. Exit bend according to claim 9, characterized in that, that the transverse distance (Q) between the two front ends (10) is maximal and that the transverse distance (Q) is minimized with increasing distance from the front end (10), in particular such that the two side surfaces (8) form a common rear end (11); or that both the front ends (10) and the rear ends (11) are at a respective transverse distance to each other, the transverse distance between the rear ends (11) being smaller than the transverse distance between the front ends (10).
11. Exit arc according to claim 9 or 10, characterized in that the front end (10) lies above a plane (E) which extends through the first central axis and which is perpendicular to the second central axis.
12. Exit bend according to one of claims 9 to 11, characterized in that the rear end (11) is chamfered with a bevel (35), wherein the chamfer (35) preferably has a first chamfer section (36) and a second chamfer section (37), wherein the first chamfer section (36) lies on one side of a median plane (ME) spanned by the two central axes (M1, M2) and the deflection axis (U), and wherein the second chamfer section (37) lies on the other side of the median plane (ME), wherein the two chamfer sections (36, 37) preferably extend at an angle to each other, the angle closing towards the pipe end of the second pipe section (6); or wherein the angle opening towards the pipe end of the second pipe section (6).
13. Outlet bend (1) according to one of the preceding claims, characterized in that the at least one guide wall (7) extends from an inner surface (12) of the deflection section and / or from an inner surface (13) of the second pipe section (6) into the interior (14) of the outlet bend (1).
14. Exit bend according to claim 13, characterized in that the at least one guide wall (7) is in contact with the respective inner surface (13) over its entire length; or that the at least one guide wall (7) is in contact with the respective inner surface (12, 13) over at least a first partial area (30) of its entire length and that the at least one guide wall (7) is set off from the respective inner surface (12, 13) over at least a second partial area (31) such that a gap (29) is created between the guide wall (7) and the respective inner surface (12, 13).
15. Exit arch (1) according to one of the preceding claims, wherein 25 characterized that the height of the at least one guide wall (7) increases continuously at right angles to an inner surface (12) of the deflection section (3) in a first arc section (19) of the deflection section (3) and is essentially constant in a second arc section (20) of the deflection section (3), wherein the first arc section (19) preferably extends over a length range of one fifth to half the total length of the deflection section (3) or from one third to half the total length of the deflection section (3); and / or that the at least one guide wall (7) in the second pipe section (6) has a substantially constant height over a first subsection (21) as seen perpendicularly from an inner surface (13) of the second pipe section (6), and that the at least one guide wall (7) in a second subsection (22) runs at an angle in the range of 35° to 65°, in particular in the range of 40° to 50°, to the inner surface (13), so that the height of the guide wall (7) in the second subsection (22) decreases continuously.
16. Exit bend (1) according to one of the preceding claims, characterized in that, viewed in a central plane (ME) extending through the two central axes (M1, M2), the deflection section (3) extends arc-shaped, in particular circular arc-shaped, on the deflection outer side (4) with an arc (23); and / or that, viewed in a central plane (ME) extending through the two central axes (M1, M2), the deflection section (3) is designed as a deflection edge (24) on the deflection inner side (5).
17. Outlet bend (1) according to one of the preceding claims, characterized in that the at least one guide wall (7) is formed on the inner surface (12) of the deflection section (3) and the inner surface (13) of the second pipe section (6); or that the at least one guide wall is formed on an insert which can be inserted into the deflection section and the second pipe section.
18. Outlet bend (1) according to one of the preceding claims, characterized in that the first pipe section (2) has a stop surface (26) which, viewed in the flow direction of the flow medium, is arranged upstream of the deflection section (3) and upstream of the at least one guide wall (7).
19. Outlet bend (1) according to one of the preceding claims, characterized in that the at least one guide wall (7) forms part of a cavity26 (38) towards the interior (14) of the exit arch (1).
20. Outlet bend (1) according to claim 19, characterized in that the cavity (38) is open at the rear end of the at least one guide wall (7); and / or that the cavity (38) is closed off on the side facing the interior by the wall of the first pipe section (2) and / or the deflection section (3) and / or the second pipe section (6).
21. Exit arc according to one of the preceding claims, characterized in that the surface section (9) is spanned by a first edge (40) and a second edge (41), wherein the first edge (40) and the second edge (41) extend away from endpoints (P) of an arc segment (B) located on the inner surface of the first pipe segment (2) or the deflection segment (3), and wherein the second edge (41) extends from said endpoint (P) at least section by section with increasing distance to the inner surface in the direction of the second pipe section (6) and wherein the first edge (42) extends on the inside of the first pipe section (2) and / or the deflection section (3) and / or the second pipe section (6).
22. Outlet bend (1) according to claim 21, characterized in that the distance between the first edge (40) and the second edge (41) decreases, at least section by section, as viewed perpendicularly to the first edge (40) and / or the second edge (41), with increasing distance to the first pipe section (2).
23. Use of a discharge elbow (1) according to one of the preceding claims as a discharge elbow (1) of a sanitary article, such as a toilet bowl or a urinal, wherein, viewed in the installed position of the outlet bend (1), the first central axis (M1) runs perpendicular to the vertical direction (L) and the second central axis (M2) runs in the vertical direction (L), such that the flow medium flows through the first pipe section (2) into the deflection section (3) and is channeled in the deflection section (3) by the at least one guide wall (7) in the direction of the vertical direction (L); or where, viewed in the installed position of the outlet bend (1), the first central axis (M1) is perpendicular to the vertical direction (L) and the second central axis (M2) is angled at an angle (β)27 inclined to the vertical direction (L), such that the flow medium flows through the first pipe section (2) into the deflection section (3) and in the deflection section (3) is prevented from flowing upwards against the vertical direction (L) by the at least one guide wall (7) and is deflected in the direction of the second pipe section (6).
24. Sanitary arrangement comprising a drain bend (1) according to any one of the preceding claims 1 to 22, and a sanitary article, such as a toilet bowl or a urinal, with a connection area for connecting the drain bend (1) or a connection area for connecting a pipe section which then opens into the drain bend (1), wherein, in the installed position of the drain bend (1), the first central axis (M1) is perpendicular to the vertical direction (L) and the second central axis (M2) is in the vertical direction (L), such that the flow medium flows through the first pipe section (2) into the deflection section (3) and is channeled in the deflection section (3) by the at least one guide wall (7) in the direction of the vertical direction (L); or wherein, in the installed position of the outlet bend (1), the first central axis (M1) is perpendicular to the vertical direction (L) and the second central axis (M2) is inclined at an angle (β) to the vertical direction (L), such that the flow medium flows through the first pipe section (2) into the deflection section (3) and in the deflection section (3) is prevented from flowing upwards against the vertical direction (L) by the at least one guide wall (7) and is deflected in the direction of the second pipe section (6).