Sanitary insert assembly

Abstract

The invention relates to a sanitary insert assembly (1) with a thread (6) and a seal ring (7). According to the invention, the thickest point (8) of the seal ring (7) is arranged outside of a thread region (9) radially occupied by the thread (6).

Description

[0001] Sanitary insertion arrangement

[0002] The invention relates to a sanitary insert assembly with a thread and a sealing ring.

[0003] The invention further relates to a sanitary fitting with a fitting thread.

[0004] Furthermore, the invention relates to a sanitary fitting with a sanitary insert arrangement.

[0005] Such insert assemblies are known and typically include a jet regulator, which can be removably inserted into the outlet openings of sanitary fittings to uniformly shape the jet pattern. Such insert assemblies can also be referred to as sanitary inserts.

[0006] It is necessary to provide at least one sealing ring on the upstream or downstream side of the thread to prevent water from escaping from the side of the insert assembly. It has become common practice to provide a groove next to one end of the thread to hold this sealing ring. To ensure that the sealing ring is pressed between the insert assembly and the sanitary fitting, a matching, cylindrical counter-sealing surface is usually provided on the fitting, which interacts with a sealing surface on a sealing element of the aerator. This counter-sealing surface must be designed within small manufacturing tolerances to ensure sufficient tightness between the fitting and the insert assembly. This increases the effort required for fitting machining.

[0007] The invention is based on the object of reducing the effort involved in machining fittings. To achieve this object, the features of claim 1 are provided according to the invention. In particular, to achieve this object, in a sanitary insert assembly of the type described above, the invention proposes that a thickest point of the sealing ring be arranged outside a threaded region radially occupied by the thread.

[0008] Thus, the insertion arrangement can also be used for fittings with non-cylindrical shaped counter sealing surfaces.

[0009] The thickest point of the sealing ring can, for example, be characterized as the point or the area in which a dimension in the axial direction is maximum. This can be the sealing ring in its assembled state on the sanitary insert arrangement. The axial direction can be the direction of the longitudinal center axis of the sanitary insert arrangement. The thickest point of the sealing ring can be determined when the sealing ring is unpressed and / or undeformed. The thickest point of the sealing ring can also be determined when the sealing ring is pressed and / or deformed. The sealing ring can be provided to seal against a fitting. The sealing ring can be pressed against a counter sealing surface of a fitting.

[0010] Alternatively or additionally, it can be provided that a thickest point of a sealing ring, for example the one already mentioned, is arranged radially outside or inside a thread crest and / or a thread root. This makes it easy to avoid the thickest point being located radially in an area that is radially delimited by the thread crest and the thread root.

[0011] Alternatively or additionally, it can be provided that at least, in particular more than half of the cross-sectional area of ​​the sealing ring is arranged outside a thread region radially occupied by the thread.

[0012] Thus, depending on the geometry of the fitting, different types of sealing rings can be used.

[0013] In general, it can be said that the invention allows for less tight manufacturing tolerances and can thus reduce the scrap rate in production.

[0014] Alternatively or additionally, it can be provided that a groove base of the thread is arranged outside a sealing ring area radially occupied by the sealing ring.

[0015] The diameter of the sealing ring can therefore be much smaller or much larger than the diameter of the thread, so that the radially occupied sealing ring and thread areas do not overlap.

[0016] In an advantageous embodiment, it can be provided that the sealing ring has a round and / or wedge-shaped and / or rectangular cross-sectional area.

[0017] The sealing ring can be an O-ring, for example. However, sealing rings with a different geometry can also be used to meet the specific requirements of certain fittings.

[0018] In an advantageous embodiment, it can be provided that the sealing ring is pressed or can be pressed at least partially in the axial direction against a counter sealing surface of a fitting.

[0019] Additionally or alternatively, a sealing surface on the sealing ring can be curved. The sealing surface is formed on the sealing ring and can be pressed against a mating sealing surface of the fitting. Thus, the sealing surface of the sealing ring can be adapted to the specific requirements of certain fittings. A curved sealing surface has the advantage that a tight fit can be achieved even on inclined surfaces (which provide a mating sealing surface) whose helix angle is subject to tolerances.

[0020] In an advantageous embodiment, a screw sleeve can be provided. The screw sleeve can be designed, for example, as a jet regulator housing or jet regulator carrier.

[0021] Thus, the insert assembly can be removably inserted into a fitting.

[0022] In an advantageous embodiment, the thread can be provided as an external thread. Thus, the insert assembly can be easily screwed in. A concealed insert assembly can thus be formed.

[0023] For example, the thread can be formed on the housing of a jet regulator or on a screw sleeve. The screw sleeve can therefore be a screw-in sleeve, for example.

[0024] In an advantageous embodiment, the screw sleeve, for example a screw-in sleeve, can be snapped, welded, pressed, and / or manufactured in one piece with a jet regulator. Thus, a jet regulator can be part of the sanitary insert arrangement in order to create a favorable jet pattern.

[0025] Depending on the intended use, the aerator can be connected to the screw sleeve in a more or less detachable manner. In particular, the aerator can thus be easily removed or replaced.

[0026] In an advantageous embodiment, it can be provided that the screw sleeve has, at its downstream end in the assembled position, pronounced tool engagement surfaces in the axial and / or radial direction, in particular indentations and / or preferably evenly distributed in the circumferential direction and / or two or at least three formations, which are so pronounced that they can interact with a tool such that a screwing movement of the sanitary insert arrangement can be driven by the tool. It is particularly advantageous in this case to form twelve indentations and / or formations.

[0027] This allows the sanitary insert assembly to be easily and removably fixed into a sanitary fitting. The insert assembly can also be manufactured in such a way that no special tools are required. For example, the insert assembly can be manufactured in such a way that a standard or standardized ring spanner can be used for assembly.

[0028] Alternatively or additionally, the features of the independent claim directed to a sanitary fitting with a fitting thread are provided according to the invention to achieve the stated object. In particular, to achieve the stated object, in sanitary fittings of the type described above, the invention proposes that an obliquely oriented counter-sealing surface preferably adjoins the fitting thread directly.

[0029] This simplifies valve machining. The angle of the counter-sealing surface, for example, can be freely selected within a tolerance range. Larger manufacturing tolerances may be permitted.

[0030] With an obliquely oriented counter sealing surface, there is linear contact between the counter sealing surface and the sealing element, whereby the contact line can run at different points on the sealing element depending on the gradient of the counter sealing surface. In an advantageous embodiment, it can be provided that a valve thread area radially occupied by the valve thread is less than half the size of a sealing surface area radially occupied by a counter sealing surface, for example the one already mentioned. The valve thread area can be defined by the distance between the root and head in the thread profile. The sealing surface area can be defined by the inner and outer boundaries of the counter sealing surface in the radial direction.

[0031] This means that the sealing rings used do not have to be precisely aligned to the diameter of the mating sealing surface intended for them on the valve. Sealing rings with different cross-sectional areas can even be used. For example, O-rings can also be used with a wedge-shaped cross-sectional area.

[0032] Alternatively or additionally, to achieve the stated object, the features of the independent claim directed to a sanitary fitting with a sanitary insert arrangement are provided according to the invention. In particular, to achieve the stated object, in sanitary fittings of the type described at the outset, it is proposed according to the invention that a counter-sealing surface between the fitting and the sealing ring is arranged on the downstream side of a thread in the assembled position of the sanitary insert arrangement and is designed such that the sealing ring contacts the fitting at at least two points which are axially and radially spaced from one another and / or is angled obliquely in the screwing-in direction such that the diameter of the contact area varies in the screwing-in direction, in particular whereby a chamfer is formed.

[0033] This allows the size of the contact surface between the sealing ring and the valve to be varied by varying the contact pressure. A particularly tight seal can be achieved. Valve machining can be simplified by adding a chamfer. Radial tolerances can thus be compensated for by axially positioning the insert assembly, by screwing it in more or less.

[0034] In an advantageous embodiment, it can be provided that the fitting has at least one, in particular cylindrical and / or conical, shoulder on the downstream side of the sealing ring, in particular to the chamfer.

[0035] This protects the counter sealing surface, for example, during a polishing process. Compression of the sealing ring when inserting the insert assembly into the fitting can also be avoided, as the diameter of the cylindrical shoulder can be dimensioned sufficiently large. This facilitates insertion and makes it easier to locate the threads. Furthermore, the circular shape of the downstream end of the insert assembly remains intact, even if tolerances or deviations occur during grinding or polishing.

[0036] The invention allows a sealing surface to be arranged at a distance from a casting path end of a melt flow during the manufacture of a fitting, at which impurities concentrate and at which shrinkage cavities and similar irregularities are likely to form.

[0037] This reduces the reject rate, as post-processing does not result in voids being opened or other defective areas being created.

[0038] Furthermore, the invention also enables the counter-sealing surface to be formed more simply and with fewer work steps, since it can be milled with a conventional countersunk head. The invention will now be described in more detail using exemplary embodiments, but is not limited to the exemplary embodiments. Further exemplary embodiments result from the combination of the features of one or more claims with one another and / or with one or more features of the exemplary embodiment.

[0039] It shows :

[0040] Fig. 1 shows the outlet end of a sanitary fitting according to the invention with a sanitary insert arrangement according to the invention in an axial section,

[0041] Fig. 2 is an enlargement of the area marked in Fig. 1 of a counter sealing surface, a wedge-shaped seal and a section of a screw sleeve,

[0042] Fig. 3 a wedge-shaped sealing ring,

[0043] Fig. 4 the end of an inventive

[0044] Sanitary fitting with a sanitary insert arrangement according to the invention in an axial section from the downstream direction,

[0045] Fig. 5 shows a screw sleeve of a sanitary insert arrangement according to the invention from the downstream direction,

[0046] Fig. 6 shows a screw sleeve of a sanitary insert arrangement according to the invention from the inflow direction,

[0047] Fig. 7 shows the outlet end of a sanitary fitting according to the invention with a second sanitary insert arrangement according to the invention in an axial section,

[0048] Fig. 8 shows the outlet end of a sanitary fitting according to the invention with a third sanitary insert arrangement according to the invention in an axial section, Fig. 9 shows the outlet end of a sanitary fitting according to the invention with a sanitary insert arrangement according to the invention with ring-shaped tool engagement surfaces from the downstream direction,

[0049] Fig. 10 shows a screw sleeve according to the invention with ring-shaped tool gripping surfaces,

[0050] Fig. 11 the cross-sectional areas of various sealing rings,

[0051] Fig. 12 shows the outlet end of a sanitary fitting according to the invention with a fourth sanitary insert arrangement according to the invention in an axial section,

[0052] Fig. 13 shows the outlet end of a sanitary fitting according to the invention with a sanitary insert arrangement according to the invention with indentations as tool engagement surfaces from the downstream direction,

[0053] Fig. 14 shows a sanitary insert arrangement according to the invention with indentations as tool engagement surfaces from the inflow direction,

[0054] Fig. 15 shows the outlet end of a sanitary fitting according to the invention with a fifth sanitary insert arrangement according to the invention in an axial section,

[0055] Fig. 16 is an exploded view of the outlet end of a sanitary fitting according to the invention with a sanitary insert arrangement according to the invention,

[0056] Fig. 17 shows the outlet end of a sanitary fitting according to the invention with a sanitary insert arrangement according to the invention in an axial section,

[0057] Fig. 18 the ends of an inventive

[0058] Sanitary fitting with a sanitary insert assembly according to the invention in an axial section using various sealing rings. In the following description of various embodiments of the invention, elements that correspond in function are given the same reference numerals, even if they have different designs or shapes.

[0059] For clarity, not all reference symbols are shown in the figures, although the elements may very well be present in the figures. However, identical reference symbols indicate functionally and / or structurally identical components and functional units.

[0060] Fig. 1 shows an axial section of a sanitary insert assembly 1 according to the invention, which is inserted into a sanitary fitting 20. The direction of water flow is designated by 34. The insert assembly 1 comprises a diffuser 3 inserted into a diffuser ring 2 and an outlet structure 5 inserted into a housing part 4 or molded onto a housing part 4. Furthermore, the insert assembly 1 has a thread 6 and, in this case, a wedge-shaped sealing ring 7. The sealing ring 7 is positioned upstream of the thread 6 in the screw-in direction. The thickest point 8 of the sealing ring 7 is located outside the radially occupied thread area 9. This also applies to at least half of the cross-sectional area 10 of the sealing ring 7. Furthermore, a groove base 11 of the thread 6 is located outside a radially occupied sealing ring area 12. Furthermore, a screw sleeve 13 is shown, into which the jet regulator 14 is inserted.

[0061] Fig. 2 shows an enlarged view of the contact area 31 between the sealing ring 7 on the screw sleeve 13 and the fitting 20. The sealing ring 7 contacts the fitting 20 at a counter sealing surface 21, which forms a chamfer 23. A cylindrical shoulder 22 is also visible.

[0062] Fig. 3 shows a wedge-shaped sealing ring 7, ie with a wedge-shaped cross-sectional area 10. Fig. 4 shows a sanitary insert arrangement 1 according to the invention in axial section, which is inserted into a sanitary fitting 20, seen from the downstream end 25 of the screw sleeve 13.

[0063] Fig. 5 shows a screw sleeve 13 with tool engagement surfaces 15 in the form of indentations 16 as seen from the downstream end 25.

[0064] Fig. 6 shows the screw sleeve 13 from Fig. 5 from the inflow end 17.

[0065] Fig. 7 shows a further sanitary insert arrangement 1 according to the invention in axial section, which is inserted into a sanitary fitting 20. The insert arrangement 1 comprises a diffuser 3 inserted into a diffuser ring 2 and an outlet structure 5 inserted into a housing part 4 or formed onto a housing part 4. Furthermore, the insert arrangement 1 has a thread 6 and a sealing ring 7 designed as an O-ring. The thickest point 8 of the sealing ring 7 is located outside the radially occupied thread area 9. Furthermore, a screw sleeve 13 is shown, which in this embodiment is designed in one piece with the housing part 4. In addition, an attachment sieve 18 and a flow regulator 19 are formed.

[0066] Fig. 8 shows a further sanitary insert assembly 1 according to the invention in axial section, which is inserted into a sanitary fitting 20. In this exemplary embodiment, there is no cylindrical shoulder 22 adjacent to the counter-sealing surface 21 formed as a chamfer 23. The diameter 30 of the contact area 31 between the sealing ring 7 and the fitting 20 is indicated.

[0067] The thickest point 8 is radially outside the

[0068] Thread crests 36 of the thread 6. Fig. 9 shows the downstream end 25 of a sanitary fitting 20 according to the invention with a sanitary insert assembly 1 according to the invention, on whose screw sleeve 13 ring-shaped formations 24 are formed as tool engagement surfaces 15.

[0069] Fig. 10 shows a screw sleeve 13 according to the invention with ring-shaped formations 24 as tool engagement surfaces 15 from the downstream end 25.

[0070] Fig. 11 shows sealing rings 7 with variously shaped cross-sectional areas 10. These can be, for example, circular in the case of an O-ring, triangular in the case of a wedge-shaped ring, or even square. The thickest point 8 of each sealing ring is indicated.

[0071] Fig. 12 shows another sanitary insert assembly 1 according to the invention in axial section, which is inserted into a sanitary fitting 20. The insert assembly 1 in this exemplary embodiment has a coarse thread 6 and is more compactly constructed, so that it does not fill the entire fitting thread 27. The radially occupied fitting thread area 28 is less than half the size of the radially occupied sealing surface area 29. Furthermore, in this exemplary embodiment, the screw sleeve 13 is welded to the housing part 4.

[0072] Fig. 13 shows the downstream end 25 of a sanitary fitting 20 according to the invention with a sanitary insert arrangement 1 according to the invention, on the screw sleeve 13 of which indentations 16 are formed as tool engagement surfaces 15.

[0073] Fig. 14 shows a screw sleeve 13 according to the invention with indentations 16 as tool engagement surfaces 15 from the upstream end 17. Fig. 15 shows a further sanitary insert arrangement 1 according to the invention in axial section, which is inserted into a sanitary fitting 20. The insert arrangement 1 in this exemplary embodiment again has a finer thread 6 and is constructed in a similarly compact manner to the insert arrangement from Fig. 12, so that it does not fill the entire fitting thread 27. In this exemplary embodiment, a plurality of cylindrical and conical shoulders 22 are formed on the downstream end 25 of the fitting 20. The sealing ring 7 contacts the fitting 20 at two axially and radially spaced points 32 and 33.

[0074] Fig. 16 shows an exploded view of a sanitary fitting 20 according to the invention with a sanitary insert assembly 1 according to the invention. The sanitary fitting 20 comprises the fitting thread 27, to which a chamfer 23 and a cylindrical shoulder 22 are connected on the downstream side. Also shown are the diffuser ring 2, the sealing ring 7, and the screw sleeve 13 with its thread 6 and the tool engagement surfaces 15.

[0075] Fig. 17 shows a sanitary fitting 20 according to the invention with a sanitary insert assembly 1 according to the invention in an axial section, wherein the sealing ring 7 is positioned downstream of the thread 6 in the screwing direction. On the sanitary fitting 20, a cylindrical shoulder 22 is followed in the screwing direction by the fitting thread 27, another cylindrical shoulder 22, and the chamfer 23.

[0076] In Fig. 17 it is also evident that the thickest point 8 of the sealing ring 7 lies radially inside the thread root 37 (and thus, since the thread 6 is an external thread here, also radially inside the thread crest 36).

[0077] By screwing the thread 6, the sealing ring 7 is pressed at least partially axially against the counter sealing surface 21. The sealing ring 7 forms a curved sealing surface 26 that bears against the counter sealing surface 21.

[0078] Fig. 18 shows sanitary fittings 20 according to the invention with sanitary insert assemblies 1 according to the invention in an axial section in comparison when using different sealing rings 7. In an enlargement, it can be seen how the effect of the chamfer 23 with sealing rings 7, in this case O-rings, of different cord thicknesses leads to different positions of the end 35 of the sanitary insert assembly 1, which end is positioned upstream of the thread 6 in the screwing direction. In a similar way, different positions of the end 35, which is positioned upstream of the thread 6 in the screwing direction, result from variations in the angle between the chamfer 23 and the screwing direction 34 and the immersion depths of the chamfer 23.

[0079] List of reference symbols

[0080] 1 sanitary installation arrangement

[0081] 2 Di f fusorring

[0082] 3 Di f fusor

[0083] 4 Housing part

[0084] 5 Expiry structure

[0085] 6 threads

[0086] 7 Sealing ring

[0087] 8 thickest part of the sealing ring

[0088] 9 Thread range

[0089] 10 Cross-sectional area of ​​the sealing ring

[0090] 11 Groove base

[0091] 12 Sealing ring area

[0092] 13 screw sleeve

[0093] 14 aerators

[0094] 15 Tool gripping surface

[0095] 16 indentations

[0096] 17 upstream end

[0097] 18 Front screen

[0098] 19 Flow regulator

[0099] 20 sanitary fittings

[0100] 21 Counter-sealing area

[0101] 22 paragraph

[0102] 23 phase

[0103] 24 wreath-shaped formations

[0104] 25 downstream end

[0105] 26 Sealing surface

[0106] 27 fitting threads

[0107] 28 fitting thread range

[0108] 29 Seal f 1 surface area

[0109] 30 diameter

[0110] 31 Contact area

[0111] 32 points

[0112] 33 further point flow direction upstream end thread tip thread root

Claims

Claims: Sanitary insertion arrangement (1) with a thread (6) and a sealing ring (7), characterized in that a thickest point (8) of the sealing ring (7) is arranged outside a threaded area (9) radially occupied by the thread (6). Sanitary insertion arrangement (1) according to the preamble of claim 1 or according to claim 1, characterized in that a thickest point (8) of a sealing ring (7) is arranged radially outside or inside a thread crest (36) and / or a thread root (37) of the thread (6). Sanitary insertion arrangement (1) according to the preamble of claim 1 or according to one of the preceding claims, characterized in that at least, in particular more than half of the cross-sectional area (10) of the sealing ring (7) is arranged outside a threaded area (9) radially occupied by the thread (6).Sanitary insertion arrangement (1) according to the preamble of claim 1 or according to one of the preceding claims, characterized in that the sealing ring (7) is positioned upstream and / or downstream of the thread (6) in the screw-in direction. Sanitary insertion arrangement (1) according to the preamble of claim 1 or according to one of the preceding claims, characterized in that a groove base (11) of the thread (6) is arranged outside a sealing ring area (12) radially occupied by the sealing ring (7). Sanitary insertion arrangement (1) according to one of the preceding claims, characterized in that the sealing ring (7) is round and / or wedge-shaped and / or rectangular. Sanitary insertion arrangement (1) according to one of the preceding claims, characterized in that the sealing ring (7) is pressed at least partially in the axial direction against a counter-sealing surface (21) and / or that a sealing surface (26) on the sealing ring (7) has a curvature. Sanitary insertion arrangement (1) according to one of the preceding claims, characterized in that a screw sleeve (13) is pronounced. Sanitary insertion arrangement (1) according to one of the preceding claims, characterized in that the thread (6) is an external thread. Sanitary insertion arrangement (1) according to one of the preceding claims, characterized in that the screw sleeve (13) is snapped, welded, pressed and / or manufactured in one piece with a flow regulator (14). Sanitary insertion arrangement (1) according to one of the preceding claims, characterized in that the screw sleeve (13) has, at its downstream end (25) in the mounting position, tool engagement surfaces (15) extending in the axial and / or radial direction, in particular indentations (16) and / or preferably arranged uniformly in the circumferential direction and / or two or at least three projections (24) which are such that they can interact with a tool in such a way that a screw movement of the sanitary insertion arrangement (1) can be driven by the tool. Sanitary fitting (20) with a fitting thread (27) , characterized in that preferably directly an obliquely oriented connection to the fitting thread (27) Sanitary fitting (20) according to the preamble of claim 9 or according to claim 9, characterized in that a fitting thread area (28) radially occupied by the fitting thread (27) is less than half the size of a sealing surface area (29) radially occupied by the or a counter-sealing surface (21). Sanitary fitting (20) with a sanitary insertion arrangement (1), in particular according to one of claims 9 or 10, characterized in that a counter-sealing surface (21) is connected between the fitting (20) and the sealing ring (7) of the The sanitary insertion arrangement (1) in its assembly position is arranged downstream of a thread (6) and is designed such that the sealing ring (7) contacts the fitting (20) at at least two axially and radially spaced points (32, 33) and / or is thus The screw-in direction is angled obliquely such that the diameter (30) of the contact area (31) varies in the screw-in direction, in particular forming a chamfer (23). Sanitary fitting (20) according to one of claims 9 to 11, characterized in that the fitting (20) has at least one, in particular cylindrical and / or conical, shoulder (22) on the downstream side towards the sealing ring (7), in particular towards the chamfer (23).

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