DE202021105807U1 - Reducer, especially for the sealed connection of two pipes, and arrangement - Google Patents

Abstract

Reducing piece (1), in particular for the sealed connection of two pipes, the reducing piece (1) having a base body (4) on which a circumference (UG) extending in a radial direction around a longitudinal center axis (MG) of the base body (1) is circular outwardly facing sealing structure (6) is provided, in particular for insertion into a pipe end of a first pipe (2), a passage opening (7) extending through the base body (4) along a longitudinal center axis (M _D ) of the passage opening (7), in particular for introducing a pipe end of a second pipe (3), and wherein either the longitudinal center axis (M _D ) of the through opening (7) extends along, in particular parallel to, the longitudinal center axis (MG) of the base body (4) and the through opening (7) is arranged eccentrically with respect to the longitudinal center axis (MG) of the base body (4) or the longitudinal center axis (M _D ) of the through opening (7) extends on the longitudinal center axis (MG) of the base body (4) t and the through opening (7) is arranged concentrically with respect to the longitudinal center axis (MG) of the base body (4), characterized in that the reducing piece (1) has a sleeve-like section (5) which is attached to the base body (by means of a connecting region (8)). 4) is formed so that the sleeve-like section (5) extends concentrically in a reference state outside the through opening (7) and in relation to a straight line (9) on which the longitudinal center axis (M _D ) of the through opening (7) lies, and that the reducer is formed in one piece from rubber.

Description

Field of technology

The present invention relates to a reducer, in particular for the sealed connection of two pipes, the reducer having a base body on which a radially outwardly pointing sealing structure, in particular for insertion into a pipe end of a first pipe, along a circumference running circularly around a central longitudinal axis of the base body , is provided, wherein a through opening extends through the main body along a longitudinal center axis of the through opening, in particular for introducing a pipe end of a second pipe, wherein either the longitudinal center axis of the through opening extends along, in particular parallel to, the longitudinal center axis of the main body and the through opening extends with respect to the The longitudinal center axis of the base body is arranged eccentrically or the longitudinal center axis of the through opening extends on the longitudinal center axis of the base body and the through opening extends with respect to the longitudinal center axis of the base body is arranged concentrically.

State of the art

Generic reducers are in the state of the art from the utility model DE 88 07 430 U1 known. In these, the base body is made of plastic using a plastic injection molding process, and the radially outer sealing structure is a sealing ring made of synthetic rubber that is held on the plastic housing and seals with its inner surface when the reducer is inserted into the spigot end of a pipe. The known reducers also have a sealing ring in the through opening of the base body made of plastic, which sealing ring seals with the outer surface of this tube when a pipe end of a second pipe is inserted into the through opening. Such reducers are usually used for the sealing connection of two pipes of connecting lines which, depending on the design of the reducer, can have more or less different nominal widths, with numerous different nominal widths being common in practice. A limitation of the known reducers is that a certain reducer can only be used on its plug-in area, i.e. on the sealing structure, as well as on its plug-on area, i.e. on the through opening, to connect pipes with a nominal width that is tailored to the specific dimensions . This requires that a corresponding number of variants of reducers are available for the multitude of different applications or for the numerous combinations of different nominal sizes. Reducers are known in which the connection for the smaller pipe cross-section is eccentric to the connection for the larger pipe cross-section, especially for applications in which the pipes to be connected have nominal widths that differ greatly from one another. In applications with only a slight line gradient, this enables the reducer to be used in such a rotational position so that the connection for the smaller nominal diameter is located in the lower cross section of the reducer, in order to avoid in particular that it is blocked by liquids flowing through it, especially waste water undesired noise development occurs. The previously possible noise reduction is, however, still felt to be inadequate. In addition, reducers are also known in which the connection for the smaller pipe cross-section is arranged concentrically to the connection for the larger pipe cross-section. In the case of the known reducers, their multi-part structure and the described “material mix” of plastic and rubber are also felt to be disadvantageous.

Summary of the invention

Against the background of the prior art described, the present invention is based on the object of advantageously designing a reducer. In particular, the aim is to be able to at least partially or completely avoid the disadvantages described above by means of a reducer according to the invention.

According to a first aspect of the present invention, the set object is achieved first and foremost in connection with the features that the reducer has a sleeve-like section which is molded onto the base body by means of a connecting area, so that the sleeve-like section is in a reference state of the reducer outside of the through-opening and thereby with respect to a straight line on which the longitudinal center axis of the through-opening lies, extends concentrically, and that the reducer is formed in one piece from rubber.

Because the reducer is made in one piece from rubber, the disadvantage described in relation to the prior art of a complicated multi-part structure and the undesirable mix of materials are advantageously avoided. In addition, it can advantageously be achieved that when liquids flow through inside the reducer and adjacent in the pipes, noises are better attenuated compared to conventional reducers, ie are weaker or no longer perceptible from the outside. Finally, because of the A sleeve-like section is formed on the base body, which enables a more versatile application of the reducers compared to the prior art described at the beginning. For this purpose, there is, for example, the possibility of an embodiment in which the sleeve-like section can either be separated or introduced into the through opening in a state molded onto the base body, for which reference is made in particular to the rest of the disclosure.

According to a second aspect of the present invention, the set object is achieved first and foremost in connection with the features that the reducer has a sleeve-like section which is molded onto the base body by means of a connecting area, so that the sleeve-like section is in a reference state outside of the Passage opening and thereby extends concentrically with respect to a straight line on which the longitudinal center axis of the passage opening lies, and that the sleeve-like section in the state molded onto the base body can be introduced into the passage opening starting from the reference state, so that the sleeve-like section is concentric with the longitudinal center axis of the Through opening extends, and that the reducer is integrally formed.

According to this aspect of the invention, the multi-part construction and the material mix, which are disadvantageous in known reducers, are avoided. In addition, there is the advantage that the sleeve-like section molded onto the base body enables alternatively pipes or line sections with at least two different nominal widths to be connected to the reducer in a sealing manner. This is achieved in that, in an optionally possible first state of use of the reducer, to achieve this, starting from the reference state, the sleeve-like section can be separated from the base body, a pipe with a nominal width that matches the through opening directly and sealingly with the surface of the through opening into the Through-opening can be introduced or plugged in, whereas in an optionally possible second state of use, in which the sleeve-like section is "turned inside out" starting from the reference state in a state still molded onto the base body and is introduced into the through opening, the diameter of this connection on the reducer is reduced by the sleeve-like section, so that another pipe with a smaller nominal diameter (compared to the above-mentioned alternative state of use) can be inserted sealingly into the sleeve-like section introduced into the through-opening. In the second possibility, too, a pipe end is introduced into the through-opening, but is surrounded therein by the sleeve-like section, the sleeve-like section sealing inwardly from the pipe end and outwardly from the surface of the through-opening. The fact that the sleeve-like section continues to be molded onto the base body by means of the connection area when it is inserted into the through-opening also prevents the sleeve-like section from being unintentionally moved through the through-opening or even pushed out of it when a pipe end is inserted. In order to be able to “roll inside out” or turn inside the sleeve-like section for the described second option, the reducer can be made of a material that is suitable for this purpose, for example rubber. In the manner explained, a reducer according to the invention is suitable for converting a first pipe with a comparatively large first nominal diameter either with a second pipe, which has a comparatively smaller second nominal diameter, or with another second pipe, that is to say with a third pipe which has a to connect the third nominal size that differs from the second nominal size. A reducer according to the invention can therefore advantageously replace two conventional reducers that are differently dimensioned from one another due to its dual application possibilities. Depending on the selected application, either a pipe end to be connected can be introduced into the through opening either alone or in combination with the sleeve-like section inserted therein (preferably beforehand).

The pipes to be connected can each preferably be pipes from connection lines in building drainage. Such connecting lines can be used, for example, to discharge household waste water and / or rainwater. In this respect, one could also speak of connecting line sections instead of pipes. The reference state addressed with regard to the reducers according to the invention relates to a state in which the sleeve-like section is molded onto the base body and extends concentrically to a straight line on which the longitudinal center axis of the through opening lies outside the through opening. In this respect, the reference state can in particular be a state before the reducer was used as intended.

There are numerous options for preferential training:

It is preferred that the rubber is ethylene-propylene-diene rubber (EPDM). In particular, the rubber can have a hardness which is in a hardness range of 55 up to 65 Shore-A, and in particular 60 Shore-A.

An advantageous embodiment is seen in the fact that the base body has an outer wall which extends along a circular circumference around the longitudinal center axis of the base body and on which the sealing structure is formed radially on the outside The passage opening extends around the longitudinal center axis of the passage opening, and that the reducer has a rib or a plurality of ribs, the rib or a respective rib being connected at its one longitudinal end, in particular in one piece, to an outside of the inner cylindrical wall and at its other longitudinal end, in particular in one piece, is connected to an inside of the outer cylindrical wall. The inner wall and / or the outer wall can be configured in a cross-section to be circular or essentially circular. Such a configuration proves to be advantageous in particular with regard to a possible eccentric position of the through opening with respect to the longitudinal center axis of the base body. The inner wall can be supported radially along its circumference by the rib or ribs, which promotes a uniformly good sealing effect along the circumference. It is preferred here that the rib or a respective rib extends in a radial direction with respect to the longitudinal center axis of the through opening. To equalize or improve the sealing effect along the circumference, it is also preferred that the ribs are spaced apart from one another by uniformly large intermediate angles along a circumference related to the longitudinal center axis of the through opening. It is preferred that cavities are formed in the base body, each of which is bordered by the inner wall, by the outer wall and by a rib or a plurality of ribs. In this way, on the one hand, a stable structure can be achieved by means of the ribs and, on the other hand, a simultaneously lightweight construction of the reducer by means of the cavities. In connection with a possible eccentric position of the through opening with respect to the longitudinal center axis of the base body, there is the possibility that the outer wall and the inner wall merge into one another in a circumferential section.

With regard to the sealing structure, it is preferred as a further development that it has a cylindrical surface section or several cylindrical surface sections and, in particular between these cylindrical surface sections, a sealing lip or several sealing lips, the sealing lip or a respective sealing lip extending radially outward from the cylindrical surface sections or extend. This contributes to a reliable sealing effect. The sealing lips are also appropriately bordered with a circular cross-section on their outer circumference. There is the possibility that the base body has an axial stop on the side of the sealing structure facing the sleeve-like section, the outer diameter of which is greater than the outer diameter of the cylindrical surface section or the cylindrical surface sections and in particular greater than the outer diameter of the sealing lip or the sealing lips. The axial stop can effectively prevent the reducer from being inserted too far into a pipe to be connected, and a concentric alignment of the sealing structure in the pipe can be promoted.

A preferred embodiment is also seen in the fact that the sleeve-like section in the reference state has an outer surface area or several outer surface areas on its outer side, which lies or lie on an outer conical envelope surface in the reference state, that the sleeve-like section in the Reference state has an inner surface area or a plurality of inner surface areas on its inside, which lies or lie on an inner conical envelope surface in the reference state. It is preferred that a cone angle of the outer conical envelope surface corresponds in terms of amount to a cone angle of the inner conical envelope surface. There is the possibility that an annular groove or a plurality of annular grooves are made in the sleeve-like section on its said outer side between outer surface areas. The annular groove or the annular grooves can preferably have a rounded groove bottom. Such a configuration can not only bring about an improvement in the seal, but can also be advantageous in connection with the described “turning inside out” of the sleeve-like section.

It is preferred that a cylindrical surface section of the sealing structure has an outer diameter, that the through opening has an inner diameter and that the outer diameter of the sealing structure is greater than the inner diameter of the through opening and in particular at least 1.5 times, in particular at least 2 times, the Inner diameter of the through opening is. It goes without saying, however, that different ratios are also possible.

With regard to the through opening, in order to achieve the most effective seal possible, a grooving or an annular groove or a plurality of annular grooves is formed in the surface bordering the through opening.

An expedient embodiment is seen in the fact that in the reference state the sleeve-like section, at its longitudinal end facing away from the base body, has an outer diameter that is greater, in particular a few tenths of a millimeter, than an inner diameter of the through opening.

There is the possibility that the connection area is molded onto the base body on an end face of the base body along the edge of the through opening. It is preferred that the connection area is continuously connected to the base body and to the sleeve-like section along the entire circumference of the sleeve-like section. Alternatively, it would also be possible to design the connection area only along one or more sections of the circumference. It is preferred that, within the connection region, its wall thickness is reduced, in particular continuously, at least in an axial length section in the direction from the sleeve-like section to the base body. There is the possibility that an annular groove closed along its circumference is formed on the outside of the connection area, in the groove base of which the connection area has its smallest wall thickness, it being provided in particular that the annular groove adjoins the base body. The groove cross section can preferably have a rounded groove bottom. Such an annular groove can preferably serve as a predetermined separation point visible from the outside, along which the sleeve-like section can easily be cut off or torn off from the base body if necessary.

It is preferred that the reducer is produced by means of vulcanization, in particular in an injection mold.

According to a further aspect, the invention relates to an arrangement comprising a first tube, a second tube and a connecting part, the connecting part being a reducer according to the invention, the sealing structure being inserted into a spigot end of the first tube, the sleeve-like section is arranged in the through opening and wherein a pipe end of the second pipe is inserted into the sleeve-like portion. For further developments and advantages possible in this regard, reference is made to the rest of the description.

According to a further aspect, the present invention relates to an arrangement comprising a first pipe, a second pipe and a connecting part, the connecting part being the base body of a reducer according to the invention, from which the sleeve-like section is separated, the sealing structure in a The spigot end of the first tube is inserted and wherein the sleeve-like section is separated from the base body and a tube end of the second tube is inserted into the through opening. Reference is also made to the rest of the description for further developments and advantages that are possible in this regard.

In order to develop the arrangements according to the invention, it is preferred that the spigot end of the first tube is flush with the surface of a floor or a wall. There is the possibility that the spigot end of the first tube and the tube end, in particular spigot end, of the second tube each extend vertically or horizontally or with a slight slope (i.e. with a slope angle of only a few degrees).

Figure list

• 1 Perspektivisch ein erfindungsgemäßes Reduzierstück gemäß einem Ausführungsbeispiel in einem Referenzzustand;
• 2 perspektivisch das in 1 gezeigte Reduzierstück in einer anderen Blickrichtung;
• 3 eine Draufsicht in Blickrichtung III gemäß 1;
• 4 eine Unteransicht in Blickrichtung IV gemäß 2;
• 5a eine Schnittansicht entlang Schnittebene Va-Va in 3;
• 5b eine Schnittansicht entlang der abgewinkelten Schnittebene Vb, Vb in 3;
• 6 eine Ausschnittsvergrößerung von Detail VI aus 5a;
• 7 das in den 1 bis 6 gezeigte Reduzierstück während des Abschneidens des hülsenartigen Abschnittes;
• 8 eine Draufsicht auf das in den 1 bis 7 gezeigte Reduzierstück, ohne den von dem Grundkörper abgetrennten hülsenartigen Abschnitt;
• 9a eine Schnittansicht des Grundkörpers gemäß Schnittebene IXa-IXa in 8 und daneben den abgetrennten hülsenartigen Abschnitt;
• 9b eine Schnittansicht des in 8 gezeigten Grundkörpers entlang Schnittebene IXb-IXb ohne den abgetrennten hülsenartigen Abschnitt,
• 10a in perspektivischer Schnittansicht eine erfindungsgemäße Anordnung gemäß einem ersten Ausführungsbeispiel;
• 10b in perspektivischer Schnittansicht eine erfindungsgemäße Anordnung gemäß einem zweiten Ausführungsbeispiel;
• 11 das in den 1 bis 7 gezeigte Reduzierstück, wobei der hülsenartige Abschnitt umgestülpt („umgekrempelt“) und in der Durchgangsöffnung angeordnet ist;
• 12a in perspektivischer Schnittansicht eine erfindungsgemäße Anordnung gemäß einem dritten Ausführungsbeispiel und
• 12b in perspektivischer Schnittansicht eine erfindungsgemäße Anordnung gemäß einem vierten Ausführungsbeispiel.

The inventions are described below by way of example with reference to the accompanying figures, which show preferred exemplary embodiments. In detail shows:

• 1 Perspective of a reducer according to the invention according to an exemplary embodiment in a reference state;
• 2 in perspective the in 1 Reducer shown in a different direction of view;
• 3 a plan view in the direction III according to 1 ;
• 4th a bottom view in viewing direction IV according to 2 ;
• 5a a sectional view along section plane Va-Va in 3 ;
• 5b a sectional view along the angled cutting plane Vb, Vb in 3 ;
• 6th an enlarged section of Detail VI 5a ;
• 7th that in the 1 until 6th Reducer shown during the cutting off of the sleeve-like section;
• 8th a top view of the in the 1 until 7th Reducer shown without the sleeve-like section separated from the base body;
• 9a a sectional view of the base body according to section plane IXa-IXa in 8th and next to it the separated sleeve-like section;
• 9b a sectional view of the in 8th Basic body shown along the sectional plane IXb-IXb without the separated sleeve-like section,
• 10a in a perspective sectional view an arrangement according to the invention according to a first embodiment;
• 10b in a perspective sectional view an arrangement according to the invention according to a second embodiment;
• 11th that in the 1 until 7th Reducer shown, wherein the sleeve-like section is turned inside out (“turned inside out”) and arranged in the through opening;
• 12a in a perspective sectional view an arrangement according to the invention according to a third embodiment and
• 12b in a perspective sectional view an arrangement according to the invention according to a fourth embodiment.

Description of the embodiments

A reducer according to the invention 1 According to one embodiment, reference is first made to 1 until 6th described. Such a reducer 1 can how then based on the 10a , 10b , 12a and 12b is shown, preferably for the sealed connection of two pipes 2 , 3 serve, but other applications are also conceivable. As explained by way of example, as an alternative to the 10a , 10b connected pipe 3 according to the 12a , 12b another pipe 3 that is different from the one in the 10a , 10b selected pipe 3 differs by its nominal size. With reference to the 1 - 6th comprises a reducer according to the invention 1 a base body 4th and a sleeve-like section formed thereon during its manufacture 5 , being the reducer 1 is formed in one piece overall. On the main body 4th is at one along a circular about a longitudinal central axis M _G of the main body 1 running circumference U _G a radially outwardly facing sealing structure with a circular edge in cross section 6th for insertion into a pipe end of a first pipe 2 trained, see also the 10a , 10b , 12a , 12b . Through the main body 4th a through opening with a circular edge in cross section extends 7th along a longitudinal central axis M _D the passage opening 7th . As described below, the through opening 6th for, depending on the application, direct or indirect introduction of a pipe end of a second pipe 3 serve. Like in particular the 5a and 5b show, extends the longitudinal central axis M _D the passage opening 7th in the example parallel to and laterally spaced from the longitudinal center axis M _G of the main body 4th , so that the through opening with respect to the longitudinal center axis of the M _G of the main body 4th is arranged eccentrically. In 4th is this eccentricity with the reference number e referred to, the drawing or cross-sectional plane perpendicular to the longitudinal center axes M _D and M _G located. The sleeve-like section 5 is by means of a connection area 8th to the main body 4th molded. the 1 until 6th show one after the reducer is made 1 reference condition before using the reducer 1 . The sleeve-like section extends here 5 outside the through opening 7th and with respect to a straight line 9 , on which the longitudinal central axis M _D the passage opening 7th lies, concentrically. In the embodiment, like that 5a and 5b show the connection area 8th on one end face 10 of the main body 4th along the edge of the through opening 7th continuously molded. The connection area 8th extends in the reference state between the base body 4th and the sleeve-like section 5 and, as will be described below, either a flexible hinge for "turning inside out" or turning inside out the sleeve-like section, depending on the desired application 5 into the through opening 7th into or a preferred separating area for separating, in particular for cutting and / or tearing off, from the base body 4th ready. In the embodiment shown, the reducer is 1 made in one piece from rubber. Alternatively, the reducer could 1 be made in one piece from another deformable material, which also, depending on requirements, turning inside out or cutting off the sleeve-like section 5 enables. In the embodiment shown in the figures, the reducer is made in one piece from ethylene-propylene-diene rubber (EPDM), the hardness of which is 60 Shore-A.

Like in particular the 2 and 4th show, possesses the main body 4th an outer wall 11th extending along a circular perimeter U _G around the longitudinal central axis M _G of the main body 4th extends. On the wall 11th is with respect to the longitudinal central axis M _G radially outside the sealing structure 6th educated. Furthermore, the base body 4th a substantially cylindrical inner wall 12th on, which is under the border of the through opening 7th closed on the circumference around the central longitudinal axis M _D the passage opening 7th extends. Looking at the outer wall 11th and the inner wall 12th geometrically as a cylinder, these cylinders penetrate one another in a circumferential section. The reducer 1 has several, in the example five, ribs 13th on who like 4th shows, with respect to the longitudinal central axis M _D the passage opening 7th extend radially. Every rib is there 13th at their radially inner longitudinal end 14th integral with the outside 15th the inner cylindrical wall 12th connected and at their radially outer longitudinal end 16 integral with the inside 17th the outer cylindrical wall 11th connected. The ribs are along one on the longitudinal center axis M _D the passage opening 7th related scope U _D from each other in pairs through uniformly large intermediate angles γ spaced. Using the described design are in the base body 4th multiple cavities 18th each formed by the inner wall 12th , from the outer wall 11th and, depending on the position of the cavity, either a rib 13th or two ribs 13th are bordered.

The sealing structure 6th has a plurality of cylindrical surface sections in the exemplary embodiment 19th and between each two adjacent cylindrical surface sections 19th one sealing lip each 20th , with a respective sealing lip 20th from the cylindrical surface portions 19th starting with respect to the longitudinal center axis M _G of the main body 4th extends radially outward. In 5a is that of the surface sections 19th certain outside diameters with d ₁ and that of the radially outer tips of the sealing lips 20th certain outside diameter is with d ₂ specified, where d ₂ greater than d ₁ is. The base body also has 4th at its the sleeve-like section 5 facing side of the sealing structure 6th an axial stop 21 . This extends starting from the surface section adjoining it 19th also annularly radially outward, where the reference number d ₃ denotes the outer diameter on its outer edge. In the example is the outside diameter d ₃ larger than the outside diameter d ₂ . This configuration enables the base body 4th , starting with his from the axial stop 21 facing away from the longitudinal end, insert it into a spigot end of a pipe with a suitable nominal diameter until the axial stop 21 abuts against an end face of the spigot, the sealing lips 20th can deform elastically to achieve the desired sealing effect.

The one in the 1 - 6th The embodiment shown has the sleeve-like section 5 with respect to the reference state, four outer surface areas on its outside 22nd in the, for example. Also in the 5a , 5b reference state shown on an outer conical envelope surface, so on a geometrically imaginary conical surface, lie. In 6th is the cone angle belonging to this conical envelope surface α specified. Furthermore, the sleeve-like section in the example has a continuous inner surface area on its inside 23 which lies on an inner conical envelope surface in the reference state, the related cone angle as well β in 6th is specified. In the example, the cone angle corresponds to α the cone angle β so that the sleeve-like section 5 along its axial extent, apart from that on its outside between the outer surface areas 22nd introduced ring grooves 24 , a constant wall thickness w owns. In the example, the two cone angles are between 1 and 2 degrees. It goes without saying, however, that different angles can also be possible.

Also in 6th is shown in a schematic enlargement that in which the passage opening 7th limiting surface in the example a grooving is introduced to improve the sealing effect. In the example, the creasing is carried out without a slope. The largest inside diameter related to the grooves is denoted as d4, while the smallest inside diameter resulting between adjacent grooves is denoted as d ₅ is designated. In the example is the outside diameter d ₁ the sealing structure 6th significantly larger than the inner diameter d ₄ the passage opening 7th by being more than 1.5 times the inner diameter d ₄ amounts to. Instead of or in addition to the grooving 25th could be on the surface of the through hole 7th one or more sealing lips and / or one or more annular grooves can be formed.

In 5b it is shown for the reference state that the sleeve-like section 5 on his of the main body 4th facing away from the longitudinal end an outer diameter d ₆ owns. In the example, this is only a few tenths of a millimeter larger than the inner diameter d ₄ the passage opening 7th .

The connection area 8th is on one end face 26th of the main body 4th along the edge 27 the passage opening 7th to the main body 4th molded. In the example is the connection area 8th along the entire circumference of the sleeve-like section 5 continuous with the main body 4th and with the sleeve-like section 5 connected. As 6th shows enlarged, decreases in the connection area 8th its wall thickness in one of the sleeve-like section 5 outgoing length section in the direction of the base body 4th by means of a rounding on the inside 28 . Furthermore is on the outside of the connection area 8th a closed ring groove along its circumference 29 formed, in the groove bottom of the connection area 8th its thinnest wall thickness w ' having. In the example, the outer ring groove borders 29 to the front 26th of the main body 4th on.

That in the 1 until 6th Reducer shown 1 was made from EPDM in an injection mold by means of vulcanization.

As has been described, relate to 1 until 6th for the embodiment of the reducer according to the invention shown therein 1 a reference condition before use. In addition, the 7th - 9b and 11th exemplary different possible states of use of the reducer 1 shown. the 10a and 10b show two possible arrangements based on the in the 8-9b shown state of use of the reducer according to the invention 1 in connection with two pipes 2 , 3 are realized. On the other hand, they show 12a and 12b For example, two possible exemplary embodiments of arrangements that are based on the in 11th shown state of use of a reducer according to the invention 1 in connection with two pipes 2 , 3 are realized.

7th shows in perspective the possibility that the sleeve-like section 5 along the ring groove 29 with the lowest wall thickness in the bottom of the groove w ' of the connection area 8th is located from the main body 4th is separated. In the example it is suggested by means of the blade 30th a knife 31 along the groove base of the annular groove 29 make a circumferential cut around the sleeve-like portion 5 from the main body 4th to separate. The remaining body 4th is in 8th shown. 9a shows a sectional view of the base body 4th along the cutting plane IXa-IXa, with the separated sleeve-like section 5 is shown. The representation is simplified insofar as the groove 29 is not shown and the dividing line is flush with the face 10 of the main body 4th runs. Regardless of this, as already described, the separation can also be carried out along the in 6th indicated dividing line 32 , in which the smallest wall cross-section w ' located, done so that along the edge 27 the passage opening 7th at least initially one over the face 10 protruding collar remains, which can be removed if necessary. 9b shows the main body 4th after separating the sleeve-like section 5 along the in 8th shown, angled section line IXb-IXb.

Based on, for example, in 9a shown state of use can the reducer according to the invention 1 for example application for the various, exemplarily in the 10a and 10b find the arrangements shown. In the 10a The arrangement shown can be obtained in that the spigot end 33 one with a slight slope in a wall 34 running first pipe 2 flush with a wall surface 35 is shortened that the on the base body 4th trained sealing structure 6th into the spigot end of the first tube 2 is inserted until the axial stop 21 rests against the spigot end, and that (preferably subsequently) a spigot end 36 of the second pipe 3 into the through opening 7th is inserted sealingly. 10a shows the arrangement in which the sealing structure 6th in the spigot end 33 of the first pipe 2 is inserted, in which the sleeve-like section 5 from the main body 4th is separated and at which a spigot end 36 of the second pipe 3 into the through opening 7th is plugged in. It is shown schematically that in this arrangement the sleeve-like section 5 and at least a part of the connecting portion 8th remains as a leftover piece.

In the 10b The arrangement shown differs from the arrangement according to 10a by having the first pipe 2 vertically in a floor 37 , which can be a concrete floor, for example. To achieve the in 10 The arrangement shown was the first tube 2 initially flush with the floor surface 38 shortened and then the one on the base body 4th trained sealing structure 6th into the pointed end formed by the shortening 33 of the first pipe 2 inserted until the axial stop 21 at the tip end 33 is applied. This was followed by a top end 36 of the second pipe 3 , starting from the axial stop 21 having side of the base body 4th , into the through opening 7th inserted sealingly. As a result, the arrangement was obtained in which the sealing structure 6th in a pointed end 33 of the first tube is inserted and at the spigot end 36 of the second pipe 3 into the through opening 7th is plugged in. The separated sleeve-like section also remains in this arrangement 5 with part of the connection area 8th , as far as this on the sleeve-like section 5 remains, as a leftover piece.

11th shows for that in the 1 until 6th illustrated embodiment of a reducer according to the invention 1 one to the 8th until 9b alternative state of use. Based on the reference state of the 1 until 6th became the sleeve-like section for it 5 not separated, but "turned inside out" and still attached to the base body 4th molded state in the through opening 7th plugged in. For this purpose, the sleeve-like section 5 due to its elastic deformability, it can be turned inside out, ie “turned inside out”, so that the reducer is in the reference state 1 surface areas lying on its outside 22nd are in the everted state inside it, and so that the surface area 23 which is in the reference state in the interior of the sleeve-shaped portion 5 is now located on its outside, see also, for example, the 5a , 5b and 11th . As a result, the in 11th shown turned inside out or turned inside out state of the sleeve-like portion 5 its ring grooves 24 on the inside. The turning inside out or turning inside out in the molded-on state is supported by the connection area 8th , especially the one on the rounding 28 adjacent material area, acts as a flexible hinge. In 5b referred to at the free longitudinal end of the sleeve-shaped section 5 the reference number d ₆ the outside diameter and d ₇ the inner diameter, and at that of the connecting portion 8th adjacent other longitudinal end designated d ₈ the outside diameter and d ₉ the inside diameter. In the exemplary embodiment, the diameters are d ₆ , d ₇ , ds, ds so on the diameter d ₄ , d ₅ (see also 6th ) agreed that the sleeve-like section 5 in the rolled-up state according to 11th elastically against the surface along its entire axial extent 25th the passage opening 7th presses. To support this, you can use the cone angles, for example α and β have one value or different values which is or are in the range of values from 1.5 to 2 °, although different angles may also be possible. 11th also shows that the length of the sleeve-like section 5 is chosen so that its opposite to the flexible hinge, that is, the free longitudinal end is flush with that of the end face 10 opposite end face 29 concludes.

the 12a and 12b each show examples of different possible arrangements, each based on the in 11th shown condition of use of the reducer 1 are realized. Here are a first pipe 2 and a second pipe 3 , the one to the first pipe 2 has a comparatively smaller nominal diameter, by means of which also in the 1 - 6th shown reducer 1 sealingly connected to each other. As with the 10a , 10b also in the 12a , 12b the same reference numerals have been chosen for comparable features. A common feature of the 12a and 12b The arrangements shown is that the sealing structure 6th in a pointed end 33 of the first pipe 2 is inserted that the sleeve-like section 5 in the through opening 7th is arranged and that a spigot end 36 of the second pipe 3 in the sleeve-like section 5 that is in the through opening 7th is plugged in. The corresponding in the through opening 7th introduced spigot 36 will be in the through hole 7th sealing along the circumference of the sleeve-like section 5 encompassed. The arrangements of the 12a and 12b differ in that the first pipe 2 in 12a almost horizontally through a wall 34 extends while the second tube extends 2 in 12b vertically through a floor 37 , for example a concrete floor. To obtain the in 12a the arrangement indicated became the spigot end 33 flush with the wall surface 35 shortened before the sealing structure 6th was inserted sealingly until the axial stop 21 kicks against the tip end. This was comparable to the in 12b To get the arrangement shown, the second tube 2 flush with the floor surface 38 shortened before the sealing structure 6th was inserted into it until the axial stop 21 towards the tip end 33 is applied.

In the embodiments of 10a , 10b , 12a and 12b is the pipe 2 an example of an HTPP pipe with an exemplary nominal diameter of 110 mm. In the 10a , 10b is the pipe 3 an example of an HTPP pipe with a nominal width of 50 mm. Deviating from this, the 12a , 12b by the pipe 3 for example another HTPP pipe, which has a nominal width of only 40 mm. In the arrangements according to 10a and 10b the sealing effect is created on the pipe 3 directly on the wall of the passage opening 7th , while with the arrangements of the 12a and 12b the sealing effect between the pipe 3 and the inside of the sleeve-like portion 5 as well as between the outside of the sleeve-like section 5 and the wall of the through opening 7th arises. With regard to the described arrangements, it goes without saying that the tube 3 not necessary after the pipe 2 to the reducer 1 must be connected, but that the reverse order would also be possible. The sleeve-like section 5 has according to the 12a , 12b the function of a sealing spacer sleeve in order to adapt to a smaller nominal diameter of a pipe to be connected 3 to effect. Overall, a reducer according to the invention can consequently 1 due to its possible different states of use, it can replace two conventional, mutually different reducers.

In the example of the reducer shown in the figures 1 extends the longitudinal center axis M _D the passage opening 7th along the longitudinal central axis M _G of the main body 4th , the through opening 7th with respect to the longitudinal center axis of the M of the base body 4th is arranged eccentrically. Alternatively, configurations are also possible in which the longitudinal center axis is M _D the passage opening 7th on the longitudinal central axis M _G of the main body 4th extends, wherein the through opening 7th with respect to the longitudinal center axis of the M _G of the main body 4th is arranged concentrically. In particular in this context, for example, the sealing structure 6th having connection of the reducer 1 exemplarily for a nominal width of 110 mm of a pipe to be connected 2 be adjusted while the through opening 7th and the sleeve-like section 5 for example, to an optional connection of different pipes 3 with a nominal width of 75 mm or with a nominal width of 90 mm can be adapted. It goes without saying that other dimensions or designs are also possible.

The above explanations serve to explain the inventions covered by the application as a whole, which also develop the state of the art independently at least through the following combinations of features, whereby two, more or all of these combinations of features can also be combined, namely:

A reducer 1 , which is characterized in that the reducer 1 a sleeve-like section 5 has, which by means of a Connection area 8th to the main body 4th is formed that the sleeve-like section 5 in a reference state outside the through opening 7th and with respect to a straight line 9 , on which the longitudinal central axis M _D the passage opening 7th lies, extends concentrically, and that the reducer is integrally formed from rubber.

A reducer 1 , which is characterized in that the reducer 1 a sleeve-like section 5 having, by means of a connection area 8th to the main body 4th is formed that the sleeve-like section 5 in a reference state outside the through opening 7th and with respect to a straight line 9 , on which the longitudinal central axis M _D the passage opening 7th lies, extends concentrically, and that the sleeve-like section 5 in to the main body 4th molded state based on the reference state in the through opening 7th can be introduced so that the sleeve-like section 5 concentric to the longitudinal central axis M _D the passage opening 7th extends, and that the reducer 1 is formed in one piece.

A reducer 1 , which is characterized in that the reducer ( 1 ) is made of rubber.

A reducer 1 , which is characterized in that the rubber is ethylene-propylene-diene rubber (EPDM).

A reducer 1 , which is characterized in that the rubber has a hardness which is in the value range from 55 to 65 Shore-A and which is in particular 60 Shore-A.

A reducer 1 , which is characterized in that the base body has an outer wall 11th which extends along a circular perimeter Basement around the longitudinal central axis MG of the main body 4th extends and on which radially outside the sealing structure 6th is designed that the base body 4th an inner wall 12th has, which are located under the border of the through opening 7th around the longitudinal central axis M _D the passage opening 7th extends, and that the reducer 1 a rib 13th or multiple ribs 13th having, the rib 13th or a respective rib at one of its longitudinal ends 14th , in particular in one piece, with an outside 15th the inner cylindrical wall is connected and at its other longitudinal end 16 , in particular in one piece, with an inside 17th the outer cylindrical wall 11th connected is.

A reducer 1 , which is characterized by the fact that the rib 13th or a respective rib 13th each in one with respect to the longitudinal center axis M _D the passage opening 7th extends radial direction.

A reducer 1 , which is characterized in that the ribs 13th along one on the longitudinal center axis MD of the through opening 7th related circumference UD from each other through uniformly large intermediate angles γ are spaced.

A reducer 1 , which is characterized in that in the base body 4th Cavities 18th are formed, each of the inner wall 12th , from the outer wall 11th and from a rib 13th or more ribs 13th are bordered.

A reducer 1 , which is characterized in that the outer wall 11th and the inner wall 12th merge into one another in a circumferential section.

A reducer 1 , which is characterized in that the sealing structure 6th a cylindrical surface portion 19th has or more cylindrical surface sections 19th and between these cylindrical surface sections 19th a sealing lip 20th or more sealing lips 20th has, wherein the sealing lip 20th or a respective sealing lip 20th from the cylindrical surface portions 19th extend radially outward.

A reducer 1 , which is characterized in that the base body 4th on the the sleeve-like section 5 facing side of the sealing structure 6th an axial stop 21 has, the outer diameter of which d3 larger than the outside diameter d1 of the cylindrical surface portion 19th or the cylindrical surface sections 19th and in particular larger than the outer diameter d2 the sealing lip 20th or the sealing lips 20th is.

A reducer 1 , which is characterized in that the sleeve-like section 5 an outer surface area on its outside in the reference state 22nd or several outer surface areas 22nd has, which are in the reference state on an outer conical envelope surface that the sleeve-like portion 5 an inner surface area on its inside in the reference state 23 or several inner surface areas 23 which lie in the reference state on an inner conical envelope surface.

A reducer 1 , which is characterized by the fact that a cone angle ( α ) the outer conical envelope surface corresponds to a cone angle ( β ) corresponds to the inner conical envelope surface.

A reducer 1 , which is characterized in that in the sleeve-like section 5 on its outside between outside Surface areas 22nd an annular groove 24 or several ring grooves 24 are introduced.

A reducer 1 , which is characterized in that a cylindrical surface section 19th the sealing structure 6th an outside diameter d ₁ has that the through opening 7th an inside diameter d ₄ , d ₅ and that the outside diameter d ₁ the sealing structure 6th larger than the inside diameter d ₄ , d ₅ the passage opening 7th is and in particular at least 1.5 times, in particular at least 2 times the inner diameter d ₄ , d ₅ the passage opening 7th amounts to.

A reducer 1 , which is characterized in that the through opening 7th edging surface 25th a grooving 25th or annular grooves is formed.

A reducer 1 , which is characterized in that the sleeve-like section 5 in the reference state on his of the base body 4th facing away from the longitudinal end an outer diameter d ₆ which is larger, in particular by a few tenths of a millimeter larger than an inner diameter d ₄ the passage opening 7th is.

A reducer 1 , which is characterized in that the connection area 8th on one end face 26th of the main body 4th along the edge 27 the passage opening 7th to the main body 4th is molded.

A reducer 1 , which is characterized in that the connection area 8th along the entire circumference of the sleeve-like section 5 continuous with the main body 4th and with the sleeve-like section 5 connected is.

A reducer 1 , which is characterized in that in the connection area 8th its wall thickness at least in an axial length section in the direction from the sleeve-like section to the base body 4th , especially steadily, decreased.

A reducer 1 , which is characterized in that on the outside of the connection area 8th a closed annular groove along its circumference 29 is formed, in the groove bottom of the connection area 8th its thinnest wall thickness w ' having, it being provided in particular that the annular groove 29 to the main body 4th adjoins.

A reducer 1 , which is characterized in that the reducer 1 is produced by means of vulcanization, in particular in an injection mold.

An arrangement 1 , which is characterized in that the connecting part is a reducer 1 according to one of the preceding claims that the sealing structure 6th in a pointed end 33 of the first pipe 2 is inserted and that the sleeve-like section 5 in the through opening 7th is arranged, one pipe end of the second pipe 3 in the sleeve-like section 5 is plugged in.

An arrangement 1 , which is characterized in that the connecting part is the base body 4th of a reducer 1 according to one of claims 1 - 23 is of which the sleeve-like section 5 is separated that the sealing structure 6th in a pointed end 33 of the first pipe 2 is inserted and that the sleeve-like section 5 from the main body 4th is separated and a pipe end of the second pipe 3 into the through opening 7th is plugged in.

An arrangement 1 , which is characterized in that the spigot end 33 of the first pipe 2 flush with the surface of a floor 37 or a wall 34 concludes.

An arrangement 1 , which is characterized by the fact that the spigot ( 33 ) of the first pipe ( 2 ) and the pipe end of the second pipe ( 3 ) each extend vertically or horizontally or with a slight slope.

All the features disclosed are essential to the invention (individually, but also in combination with one another). The disclosure of the application hereby also includes the full content of the disclosure content of the associated / attached priority documents (copy of the previous application), also for the purpose of including features of these documents in the claims of the present application. The subclaims characterize, even without the features of a referenced claim, with their features independent inventive developments of the prior art, in particular in order to make divisional applications on the basis of these claims. The invention specified in each claim can additionally have one or more of the features provided in the above description, in particular provided with reference numbers and / or specified in the list of reference numbers. The invention also relates to design forms in which some of the features mentioned in the above description are not implemented, in particular insofar as they are recognizable for the respective purpose or can be replaced by other technically equivalent means.

List of reference symbols

1

Reducer

2

pipe

3

pipe

4th

Base body

5

sleeve-like section

6th

Sealing structure

7th

Through opening

8th

Connection area

9

Just

10

Face

11th

outer wall

12th

inner wall

13th

rib

14th

Longitudinal end

15th

Outside

16

Longitudinal end

17th

inside

18th

cavity

19th

Surface section

20th

Sealing lip

21

Axial stop

22nd

outer surface area

23

inner surface area

24

Ring grooves

25th

surface

26th

Front side

27

edge

28

Rounding

29

Ring groove

30th

blade

31

knife

32

parting line

33

Spigot

34

Wall

35

Wall surface

36

Spigot

37

floor

38

Soil surface

39

Face

d1

outer diameter

d2

outer diameter

d3

outer diameter

d4

Inside diameter

d5

Inside diameter

d6

outer diameter

d7

Inside diameter

d8

outer diameter

d9

Inside diameter

MG

Longitudinal central axis of the base body

UD

Circumference of the passage opening

Basement

Circumference of the body

MD

Longitudinal central axis of the through opening

w

Wall thickness

w '

Wall thickness

e

eccentricity

α

angle

β

Cone angle

γ

Cone angle

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 8807430 U1 [0002]

Claims (28)

Reducing piece (1), in particular for the sealed connection of two pipes, the reducing piece (1) having a base body (4) on which a circumference (UG) extending in a radial direction around a longitudinal center axis (MG) of the base body (1) is circular outwardly facing sealing structure (6) is provided, in particular for insertion into a pipe end of a first pipe (2), a passage opening (7) extending through the base body (4) along a longitudinal center axis (M _D ) of the passage opening (7), in particular for introducing a pipe end of a second pipe (3), and wherein either the longitudinal center axis (M _D ) of the through opening (7) extends along, in particular parallel to, the longitudinal center axis (MG) of the base body (4) and the through opening (7) is arranged eccentrically with respect to the longitudinal center axis (MG) of the base body (4) or the longitudinal center axis (M _D ) of the through opening (7) extends on the longitudinal center axis (MG) of the base body (4) t and the through opening (7) is arranged concentrically with respect to the longitudinal center axis (MG) of the base body (4), characterized in that the reducing piece (1) has a sleeve-like section (5) which is attached to the base body (by means of a connecting region (8)). 4) is formed so that the sleeve-like section (5) extends concentrically in a reference state outside the through opening (7) and in relation to a straight line (9) on which the longitudinal center axis (M _D ) of the through opening (7) lies, and that the reducer is formed in one piece from rubber. Reducer (1), in particular for the sealed connection of two pipes (2, 3), the reducer (1) having a base body (4) on which a circumference (UG) extending circularly around a longitudinal center axis (MG) of the base body is provided radially outwardly facing sealing structure (6), in particular for insertion into a pipe end of a first pipe (2), is provided, with a through opening (7) extending through the base body (4) along a longitudinal center axis (M _D ) of the through opening (7) extends, in particular for introducing a pipe end of a second pipe (3), and wherein either the longitudinal center axis (M _D ) of the through opening (7) extends along, in particular parallel to, the longitudinal center axis (MG) of the base body (4) and the through opening ( 7) is arranged eccentrically with respect to the longitudinal center axis (MG) of the base body (4) or the longitudinal center axis (M _D ) of the through opening (7) extends on the longitudinal center axis (MG) of the base body (4) corner and the through opening (7) is arranged concentrically with respect to the longitudinal center axis (MG) of the base body (4), characterized in that the reducer (1) has a sleeve-like section (5) which is connected to the base body ( 4) is formed so that the sleeve-like section (5) extends concentrically in a reference state outside the through opening (7) and in relation to a straight line (9) on which the longitudinal center axis (M _D ) of the through opening (7) lies, and that the sleeve-like section (5) can be introduced into the through-opening (7) in the state molded onto the base body (4) starting from the reference state, so that the sleeve-like section (5) is concentric to the longitudinal center axis (M _D ) of the through-opening (7 ) extends, and that the reducer (1) is integrally formed. Reducer (1) according to Claim 2 , characterized in that the reducer (1) is made of rubber. Reducer (1) according to one of the preceding claims, characterized in that the rubber is ethylene-propylene-diene rubber (EPDM). Reducer (1) according to one of the preceding claims, characterized in that the rubber has a hardness which is in the value range from 55 to 65 Shore A and which is in particular 60 Shore A. Reducer (1) according to one of the preceding claims, characterized in that the base body has an outer wall (11) which extends along a circular circumference (UG) around the longitudinal center axis (MG) of the base body (4) and on which radially outside the sealing structure (6) is designed so that the base body (4) has an inner wall (12) which extends around the longitudinal center axis (M _D ) of the through opening (7) under the border of the through opening (7), and that the reducing piece ( 1) has a rib (13) or a plurality of ribs (13), the rib (13) or a respective rib at one of its longitudinal ends (14), in particular in one piece, being connected to an outer side (15) of the inner cylindrical wall and to its other longitudinal end (16), in particular in one piece, is connected to an inner side (17) of the outer cylindrical wall (11). Reducer (1) according to one of the preceding claims, characterized in that the rib (13) or a respective rib (13) each extends in a radial direction _{with respect to the longitudinal center axis (M D) of the through opening (7).} Reducing piece (1) according to one of the preceding claims, characterized in that the ribs (13) along a longitudinal center axis (M _D ) of the through opening (7) Circumference (U _D ) are spaced apart by uniformly large intermediate angles (γ). Reducer (1) according to one of the preceding claims, characterized in that cavities (18) are formed in the base body (4), each of which is formed by the inner wall (12), the outer wall (11) and a rib (13 ) or more ribs (13) are bordered. Reducer (1) according to one of the preceding claims, characterized in that the outer wall (11) and the inner wall (12) merge into one another in a circumferential section. Reducer (1) according to one of the preceding claims, characterized in that the sealing structure (6) has a cylindrical surface section (19) or several cylindrical surface sections (19) and, in particular between these cylindrical surface sections (19), a sealing lip (20) or has a plurality of sealing lips (20), the sealing lip (20) or a respective sealing lip (20) extending or extending radially outward from the cylindrical surface sections (19). Reducer (1) according to one of the preceding claims, characterized in that the base body (4) has an axial stop (21) on the side of the sealing structure (6) facing the sleeve-like section (5), the outer diameter (d ₃ ) of which is greater than that Outside diameter (d ₁ ) of the cylindrical surface section (19) or the cylindrical surface sections (19) and in particular greater than the outside diameter (d ₂ ) of the sealing lip (20) or the sealing lips (20). Reducer (1) according to one of the preceding claims, characterized in that the sleeve-like section (5) in the reference state on its outside has an outer surface area (22) or several outer surface areas (22), which in the reference state on an outer conical envelope surface lies that the sleeve-like portion (5) in the reference state has an inner surface area (23) or several inner surface areas (23) on its inside, which lies or lie on an inner conical envelope surface in the reference state. Reducer (1) according to one of the preceding claims, characterized in that a cone angle (α) of the outer conical envelope surface corresponds in terms of amount to a cone angle (β) of the inner conical envelope surface. Reducer (1) according to one of the preceding claims, characterized in that an annular groove (24) or several annular grooves (24) is or are made in the sleeve-like section (5) on its outside between outer surface areas (22). Reducer (1) according to one of the preceding claims, characterized in that a cylindrical surface section (19) of the sealing structure (6) has an outer diameter (d ₁ ), that the through opening (7) has an inner diameter (d ₄ , d ₅ ) and that the outside diameter (d ₁ ) of the sealing structure (6) is greater than the inside diameter (d ₄ , d ₅ ) of the through opening (7) and in particular at least 1.5 times, in particular at least 2 times, the inside diameter (d ₄ , d ₅ ) of the through opening (7). Reducer (1) according to one of the preceding claims, characterized in that a grooving (25) or annular grooves is or are formed in the surface (25) bordering the through opening (7). Reducer (1) according to one of the preceding claims, characterized in that the sleeve-like section (5) in the reference state at its longitudinal end facing away from the base body (4) has an outer diameter (d ₆ ) which is larger, in particular a few tenths of a millimeter larger , as an inner diameter (d ₄ ) of the through hole (7). Reducer (1) according to one of the preceding claims, characterized in that the connection area (8) is formed on an end face (26) of the base body (4) along the edge (27) of the through opening (7) on the base body (4). Reducer (1) according to one of the preceding claims, characterized in that the connection area (8) is continuously connected to the base body (4) and to the sleeve-like section (5) along the entire circumference of the sleeve-like section (5). Reducer (1) according to one of the preceding claims, characterized in that the wall thickness of the connecting area (8) decreases, in particular steadily, at least in an axial length section in the direction from the sleeve-like section to the base body (4). Reducer (1) according to one of the preceding claims, characterized in that a closed annular groove (29) is formed on the outside of the connecting region (8) along its circumference, in the groove base of which the Connection area (8) has its smallest wall thickness (w '), it being provided in particular that the annular groove (29) adjoins the base body (4). Reducer (1) according to one of the preceding claims, characterized in that the reducer (1) is produced by means of vulcanization, in particular in an injection mold. Arrangement (1), comprising a first pipe (2), a second pipe (3) and a connection part, characterized in that the connection part is a reducer (1) according to one of the preceding claims, that the sealing structure (6 ) is inserted into a spigot end (33) of the first tube (2) and that the sleeve-like section (5) is arranged in the through opening (7), one tube end of the second tube (3) being inserted into the sleeve-like section (5) . Arrangement (1), comprising a first tube (2), a second tube (3) and a connecting part, characterized in that the connecting part is the base body (4) of a reducer (1) according to one of the Claims 1 - 23 acts, from which the sleeve-like section (5) is separated, that the sealing structure (6) is inserted into a pointed end (33) of the first tube (2) and that the sleeve-like section (5) is separated from the base body (4) and one pipe end of the second pipe (3) is inserted into the through opening (7). Arrangement according to the preceding claim, characterized in that the spigot end (33) of the first tube (2) ends flush with the surface of a floor (37) or a wall (34). Arrangement according to the preceding claim, characterized in that the spigot end (33) of the first pipe (2) and the pipe end of the second pipe (3) each extend vertically or horizontally or with a slight gradient. Reducer or arrangement, characterized by one or more of the characterizing features of one of the preceding claims.

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