PIPE CONNECTOR FOR CONNECTING THE SPIKED ENDS OF TWO PIPES

Description

[0001] The invention relates to a pipe connection part for connecting the spigot ends of two pipes, wherein the pipe connection part has two socket areas, wherein each socket area is designed to receive a pipe spigot end and has an insertion opening for inserting the pipe spigot ends, wherein between the socket areas of the pipe connection part an annular web is arranged which runs along the inner wall transversely to the longitudinal extent of the pipe connection part.

[0002] Pipe connectors for connecting pipes, particularly for connecting pipes in which the longitudinal axes of symmetry of the two pipes almost coincide, are known, for example, in the form of double sockets. Double sockets can, for example, be essentially hollow cylindrical and have insertion openings on both sides into which the spigot ends of two pipes can be inserted. The inner diameter of the double socket is adapted to the outer diameter of the pipes to be connected.

[0003] Inside a double socket, an annular web extending radially from the inner wall of the double socket can be arranged. The two side walls of the annular web can serve as a lateral stop for the pipes to be connected, preventing one pipe from being pushed too far into the double socket and causing the other pipe to be pushed out of the double socket.

[0004] Such an annular web can be disadvantageous if the pipes being laid are subjected to lateral loads. For example, when laying pipes in a curve, the pipes are pressed together on the inside of the curve, while the pipe spigots on the outside of the curve are pulled apart. This creates a gap between the annular web and the pipe spigots. Dirt particles or similar can accumulate in this gap. In addition, the tightness of the pipe connection can no longer be fully guaranteed. Furthermore, lateral loads create significant stress, which can damage the coupling.

[0005] DE 19 37 176 A1 discloses a connector for thin-walled, threadless pipes. It has one or more annular ribs inside. These ribs form annular grooves open toward the pipe inlets for accommodating sealing rings and threadless pipe ends.

[0006] US 3,796,057 A discloses a pile connector or pile coupler used to join the ends of two piles together to drive them further into the ground and to align the ends of two piles. A two-ended splicer comprises an outer sleeve having an inwardly directed bar between its ends. An inner support for each pile end is supported by the bar and is spaced from the outer sleeve to receive the end of the pile therebetween.

[0007] DE 197 18 282 A1 shows an arrangement for connecting two pipes with a socket that is double-walled at both ends and has a smooth inner surface. The pipe ends are inserted with their front edges into the gaps between the outer and inner walls. This connection allows for length compensation due to temperature fluctuations and avoids disruptive annular spaces on the inside of the connection point.

[0008] EP 2 085 673 A1 relates to a pipe connection structure comprising a socket element having an end edge suitable for receiving a spigot end of a pipe, the socket element having a wall in which a circumferential sealing ring groove is provided. A sealing ring is arranged in the sealing ring groove and, when the spigot end is received in the socket element, is in a compressed sealing state to seal the connection between the socket element and the spigot end.

[0009] The invention is based on the object of proposing a pipe connection part for connecting two pipes in which no open gap is created between the pipes even under lateral load and a high load capacity is ensured when laying bends.

[0010] This problem is solved by a pipe connection part having the features of claim 1. Further developments and advantageous embodiments are specified in the subclaims.

[0011] In a pipe connection part for connecting the spigot ends of two pipes, wherein the pipe connection part has two socket areas, each socket area being designed to receive a pipe spigot end and having an insertion opening for inserting the pipe spigot ends, wherein an annular web is arranged between the socket areas of the pipe connection part, which runs circumferentially along the inner wall transversely to the longitudinal extent of the pipe connection part, wherein the circumferential annular web has an inner sleeve extending on both sides in the direction of the insertion openings, wherein a circumferential receiving space for at least partially receiving the respective pipe spigot ends is formed between the inner sleeve, the side walls of the annular web and sections of the inner wall of the pipe connection part on both sides of the annular web, wherein the socket areas each have at least one circumferential annular bead for receiving at least one annular seal,wherein the outer sides of the annular bead, in particular the outer side of the bead base, form at least in sections a circumferential rib on the outer side of the pipe connection part, it is essential to the invention that the rib formed by the outer sides of the annular bead has a smaller outer diameter than the adjacent rib arranged further in the direction of the insertion opening and that the rib formed by the outer sides of the annular bead has a larger outer diameter than the adjacent reinforcing rib arranged further in the direction of the center of the pipe connection part.

[0012] The pipe connection part for connecting the spigot ends of two pipes is designed in the form of a double socket, i.e. for receiving pipe ends on both sides. The pipe connection part has a substantially hollow-cylindrical interior into which the spigot ends of the pipes can be inserted from both sides. In particular, the pipe connection part is designed such that two pipes can be connected such that their longitudinal axes of symmetry essentially coincide. The pipe connection part has two socket areas that extend from a central area on both sides and each have an insertion opening through which the pipes to be connected can be inserted from both sides. The insertion openings of the two adjacent socket areas are preferably radially symmetrical, and the central axes of symmetry of the two insertion openings essentially coincide.An annular web is arranged on the inner wall of the pipe connection part, which extends radially from the inner wall towards the interior of the pipe connection part. The annular web therefore preferably has the shape of a circular ring. The pipe connection part can be mirror-symmetrical and rotationally symmetrical. The annular web is arranged in the region of the central axis of symmetry, which runs perpendicular to the longitudinal extent of the pipe connection part. The side surfaces of the annular web each face an insertion opening and are arranged essentially parallel to the plane spanned by the radius of the inner wall of the pipe connection part. The inner radius of the annular web is arranged rotationally symmetrically around the cylinder axis, around which the interior of the pipe connection part is rotationally symmetrical. The cylinder axis corresponds to the longitudinal axis of the pipe connection part.An inner sleeve is arranged on the inner radius of the ring web, extending on both sides in the direction of the insertion openings. The sleeve is thus arranged transversely to the ring plane spanned by the ring web. The sleeve is therefore arranged on the web in the form of a belt, like a T-beam. The inner sleeve thus forms a projection that projects beyond the side walls of the ring web on both sides, i.e. in the direction of the insertion openings. The width of the inner sleeve, i.e. the dimension of the inner sleeve in the longitudinal extension of the pipe connection part, is preferably approximately one sixth of the diameter of the pipes to be connected. Between sections of the inner wall of the pipe connection part, the inner sleeve and the side walls of the ring web, a receiving space is formed along the ring web to accommodate the pipe spigot ends of the pipes to be connected.The receiving spaces are each open in the direction of the insertion openings so that the pipe spigot ends can be pushed in. When the pipe spigot ends of the two pipes to be connected are pushed into the pipe connection part from both sides and each brought into contact with the respective side wall of the ring web, or at least brought close to it, the gap between the pipe spigot ends and the ring web is covered or bridged by the inner sleeve. The inner diameter of the sleeve can correspond to the inner diameter of the pipes to be joined. The spigot ends of the pipes to be joined can be tapered accordingly. By inserting the spigot ends of the pipes to be joined into the receiving spaces, a gap is prevented from forming between the ring web and the pipe spigot ends.Furthermore, when installing pipes in curves, a gap is prevented from forming between the pipe spigot ends and the annular web on the outside of the curve where the pipe spigot ends are pulled apart, as the hollow spaces between the pipe spigot ends and the side walls of the annular web are covered by the inner sleeve. Furthermore, the arrangement of the inner sleeve results in improved stability of the pipe connection piece when installing pipes in curves. The formation of open gaps due to temperature fluctuations is also prevented by the arrangement of the inner sleeve. The pipe connection piece is preferably made of a single piece of plastic.

[0013] The socket areas each have a circumferential annular bead for receiving at least one annular seal. The socket areas each have at least one annular bead, into which a ring seal can be inserted. A seal received in the annular bead is provided in particular for sealing the connection between the pipes. The annular beads can each be arranged adjacent to the respective socket neck. An annular bead is designed in particular as a recess in the inner wall of the pipe connection part. The imaginary plane spanned by an annular bead is arranged parallel to a plane spanned by the diameter of the pipe connection part. The annular beads are thus arranged transversely to the longitudinal extent, i.e. to the cylinder axis of the pipe connection part.

[0014] The outer sides of the annular bead, in particular the outer side of the bead base, form, at least in sections, a circumferential rib on the outside of the pipe connection part. The annular beads for receiving the ring seals are essentially groove-like. The groove base or the bead base has an outer wall that forms a circumferential rib on the outside of the pipe connection part. The rib is arranged parallel to the reinforcing ribs formed on the outside. The rib formed by the bead base can be wider than the reinforcing ribs. The formation of a rib by the bead base provides the annular bead with dimensional flexibility.Particularly when laying pipes connected to the pipe connection part in curves, the resulting forces can be absorbed by compression on the inside of the curve and by simultaneous stretching on the outside of the curve, so that the pipe connection part does not break.

[0015] The rib formed by the outer side of the annular bead has a smaller outer diameter than the adjacent reinforcing rib located further toward the receiving opening, and the rib formed by the outer side of the annular bead has a larger outer diameter than the adjacent reinforcing rib located further toward the center of the pipe connection piece. The outer diameters of the ribs formed by the annular beads on the outside of the pipe connection piece thus fit into the outer diameters of the reinforcing ribs, which decrease from the outside to the inside. This enables favorable force distribution, particularly when installing in curves.

[0016] In a further development of the invention, the inner sleeve extending on both sides is arranged circumferentially along the inner radius of the annular web, and a circumferential undercut is formed on both sides of the annular web by the inner sleeve arranged on the annular web. The inner sleeve is arranged circumferentially in the form of a projection along the inner radius of the annular web. This enables the pipes to be joined together, with the inner walls of the pipes to be joined and the sleeve being arranged with as little step, projections, or the like as possible, so that the inner surface is as flat as possible.

[0017] In one embodiment of the invention, the inner diameter of the inner sleeve corresponds to the inner diameter of the pipes to be connected. The pipes to be connected can be chamfered or tapered on both sides at their spigot ends. The tapered areas can be accommodated between the sleeve and the inner wall of the pipe connection piece, while the front edges of the pipes can be brought into contact with the side walls of the annular web. In particular, the pipe spigot ends with their tapered sections can be adapted to the receiving spaces between the inner sleeve and the inner wall of the pipe connection piece, so that when two pipes are joined, the inner surface between the pipes and the sleeve is as flat as possible, with the inner wall of the pipes merging into the inside of the sleeve. The inner diameter of the inner sleeve therefore corresponds to the nominal inner diameter of the pipes to be connected.

[0018] In a further development of the invention, the inner sleeve is bevelled at the edges facing the insertion openings, wherein the bevel is formed on the side of the projection facing away from the inner wall of the pipe connection part, and wherein the material thickness of the inner sleeve decreases, at least in sections, towards the outer edges of the inner sleeve. The inner sleeve, i.e. the projection on both sides arranged on the annular web, has a bevel on its side facing away from the inner wall of the pipe connection part, i.e. on the side facing the interior, i.e. the longitudinal axis. In particular, the material thickness, i.e. the thickness of the inner sleeve, is less on the outer edges facing the insertion openings than in the area at the annular web. Starting from the annular web, the material thickness of the inner sleeve decreases towards its outer edges, with a bevel being formed in the direction of the inner wall of the pipe connection part.This results in improved joining of the pipes to be connected and an improved formation of an inner surface between the pipes and the inner sleeve with a surface line that is as straight as possible.

[0019] In a further development of the invention, the bevel at the outer edges of the inner sleeve transitions into a curve. The inner sleeve, which is beveled at the outer areas, transitions into a curve at its outer edges, so that the outer edges facing the insertion openings form a radius. This facilitates the joining of the pipe spigot ends to be connected.

[0020] In a further development of the invention, at least one reinforcing element is formed between the side walls of the annular web and the inner sleeve. To enable improved stability of the projection extending on both sides, formed as an inner sleeve, a reinforcing element in the form of a thickened portion of the annular web is formed between the sides of the inner sleeve facing the inner wall of the pipe connection part and the side walls of the annular web. The thickened portion of the annular web can be adapted, in particular, to the bevels, in particular the inner bevels, of the pipe spigot ends to be joined.

[0021] In a further development of the invention, the reinforcement element is designed to correspond to the bevels of the pipe spigots to be inserted. Preferably, the pipe spigots of the pipes to be joined each have an outer and inner bevel on their outer and inner edges. The reinforcement elements between the side walls of the annular web and the respective projecting area of ​​the inner sleeve can be adapted to the inner bevel of the pipe spigots, thus enabling easy joining of the pipe spigots.

[0022] In a further development of the invention, the sections of the inner wall of the pipe connection part that delimit the receiving space correspond to the outer diameters of the pipes to be accommodated. A receiving space is formed on both sides of the annular web to accommodate the spigot ends of the pipes to be joined. The outer diameter of a receiving space, which is defined by the inner wall of the pipe connection part in this area, corresponds to the outer diameter of the spigot ends of the pipes to be connected. The pipe spigot ends can be pressed into the receiving spaces. This ensures that the pipe spigot ends are securely held between the inside of the inner sleeve and the outer wall of the pipe connection part. In particular, the pipe spigot ends can have internal tapers.The inner diameter of the receiving spaces, formed by the side of the inner sleeve facing the inner wall of the pipe connection part, can correspond to the inner diameter of the pipe spigot ends in the area of ​​the inner tapers. The outer diameter of the pipe spigot ends can correspond to the inner diameter of the inner wall of the pipe connection part in this area.

[0023] In a further development of the invention, the inner diameter of the pipe connection part is larger at the openings of the receiving spaces than in the areas of the receiving spaces adjacent to the annular web. The receiving spaces extending on both sides of the annular web each have a receiving opening which is aligned towards the insertion openings. In a first area, which is arranged adjacent to the openings of the insertion spaces, i.e. in the area opposite the outer edges of the inner sleeve, the pipe connection part has a larger inner diameter than in a second area of ​​the receiving space which is arranged directly adjacent to the annular web. By reducing the inner diameter over the course of the receiving space from its opening towards the annular web, secure pressing of the pipe spigot ends in the receiving spaces is possible.

[0024] In a further development of the invention, the pipe connection part has external ribs; the ribs extend in the radial direction from the outer wall of the pipe connection part and the ribs are arranged parallel to one another. The pipe connection part has external ribs, which are designed in particular as reinforcing ribs. In particular, the ribs serve to stiffen and reinforce the pipe connection part during the deformation of the socket areas after the pipes have been joined and subsequently bent, or when the pipes are laid in curves. The ribs extend in the radial direction on the outside, for example on the outer surface of the pipe connection part. The imaginary planes spanned by the ribs are arranged parallel to one another and parallel to the plane spanned by the inner diameter of the pipe connection part. The ribs thus run transversely to the longitudinal extent of the pipe connection part.The ribs are preferably formed integrally with the pipe connection part, in particular from a plastic material. Furthermore, the ribs and the pipe connection part can alternatively be formed in two or more parts. In particular, the ribs on the outer socket regions can be formed on a sleeve-like component, which can be arranged around the socket regions. For example, the ribs can be formed on an outer sleeve part whose inner wall is essentially hollow-cylindrical. The outer regions of the socket regions can also be essentially cylindrical, so that the outer sleeves with the ribs are pushed, in particular pressed, over the socket regions. For this purpose, the socket regions can have undercuts, thus enabling secure fixing of the outer sleeves in the longitudinal direction of the pipe connection part.The ribbed outer sleeves can be made of a different material than the pipe connection part, for example, a metallic material such as aluminum, but they can also be made of the same material as the pipe connection part. When assembled, the ribs on the outer sleeves also extend radially toward the outer surface of the pipe connection part. The reinforcing ribs on the outside significantly increase the stability of the pipe connection part, particularly when deformations occur due to curved pipe routing.

[0025] In a further development of the invention, the ribs in the area of ​​the outer wall of the insertion openings have a larger outer diameter than the ribs in the middle area of ​​the connecting part. The outer ribs, i.e. the ribs in the area of ​​the insertion openings, have the largest outer diameters. The outer diameters of the adjacent ribs decrease towards the center, i.e. in the direction of the mirror symmetry axis in which the annular web is arranged. The ribs with the largest outer diameters are arranged in the area of ​​the insertion openings, while the ribs with the smallest outer diameters are arranged adjacent to the center, i.e. to the annular web. As the outer diameters of the ribs decrease, so does their height. The different outer diameters ensure improved force distribution when inserting the pipes to be connected.

[0026] In a further development of the invention, the outer diameters of the parallel ribs decrease from the insertion openings toward the center of the pipe connection piece. The contour of the outer diameters ensures a good distribution of the forces occurring when laying the pipes around curves and when inserting the pipes into the pipe connection piece.

[0027] In a further development of the invention, the socket areas each have a socket neck, and the socket necks each have a length of approximately one-third of the diameter of the pipe to be accommodated. The socket necks are the inlet areas extending from the respective insertion opening towards the center of the pipe connection part. The socket necks are essentially hollow-cylindrical and have an inner surface with a straight surface line. The socket necks are designed in particular to guide the pipes to be connected and to stabilize the pipe connection part when curved with the connected pipelines. The inner diameter of the inner wall of the socket necks roughly corresponds to the outer diameter of the pipes to be connected.

[0028] In a further development of the invention, the inner edges of the insertion openings are rounded. To simplify insertion of the pipes to be connected into the pipe connection piece, the inner edges of the insertion openings of the socket areas are rounded, particularly in the direction of the outer diameter of the pipe connection piece. This results in an enlarged diameter at the insertion opening, so that the pipe to be inserted can be more easily accommodated and guided through the rounded portion into the socket neck. Furthermore, a rounded edge reduces the notch effect on the inserted pipe.

[0029] In a further development of the invention, the inner sleeve has an inclination on both sides of the annular web toward the nearest inner wall of the pipe connection piece. The lateral projections of the annular web forming an inner sleeve are each slightly inclined toward the nearest inner wall of the pipe connection piece, i.e., the inner wall that also defines the respective receiving space. This ensures a secure hold when inserting the pipe spigot ends.

[0030] In a further development of the invention, the annular bead is designed to be flexible, at least in sections. Due to the formation of a rib on the outer wall and the resulting relatively thin wall thickness of the bead and the bead base, the annular beads are designed to be flexible, allowing the bead base to be stretched and compressed. The wall thickness is less than in the case where the bead is a recess in a solid component.

[0031] In a further development of the invention, the distance in the longitudinal extension of the pipe connection part between the outer side of the annular bead facing the insertion end and the center of the annular web corresponds approximately to one-third of the pipe diameter of the pipes to be accommodated. The distance between the annular bead and the annular web, i.e., the axis of symmetry of the pipe connection part, ensures secure pipe accommodation and force distribution when laying the pipes in curves.

[0032] In one embodiment of the invention, the pipe connection part is constructed with mirror symmetry and / or rotational symmetry. Preferably, the pipe connection part is constructed with mirror symmetry to the axis of symmetry, which preferably coincides with the web, and rotational symmetry about a cylinder axis.

[0033] The invention is further explained below with reference to an exemplary embodiment illustrated in the drawing. The schematic drawings show in detail: Fig. 1: a sectional view of a pipe connection part according to the invention; Fig. 2: a pipe connection part according to Fig. 1 with inserted pipes, Fig. 3: a pipe connection part according to the invention with inserted pipes in a curved installation; and Fig. 4: a pipe connection part with outer sleeves having ribs.

[0034] In Fig. 1 1 shows a pipe connection part 1 with two socket areas 2, 3. The socket areas 2, 3 each have insertion openings 4, 5 for inserting pipe spigot ends. A circumferential annular web 6 is arranged between the socket areas 2, 3 and runs along the inner wall 7 of the pipe connection part 1 and extends radially from the inner wall 7. The annular web 6 has an inner sleeve 8 on its outer radius, which is designed in the form of projections that extend in the direction of the insertion openings 4, 5. Receiving spaces 11, 12 for receiving pipe spigot ends of the pipes to be inserted are formed between the inner wall 7, the inner sleeve 8 and the side walls 9, 10 of the annular web 6. The annular web 6 is aligned along a mirror symmetry axis 13. The pipe connection part 1 is essentially cylindrical and radially symmetrical about a longitudinal axis 14.The inner sleeve 8 has bevels 15, 16 on its outer edges facing the insertion openings 4, 5, which taper to a radius 17, 18, forming a rounded edge of the inner sleeve 8. The socket areas 2, 3 each have an annular bead 19, 20, into which an annular seal can be accommodated. Reinforcing elements 21, 22 are formed between the side walls 9, 10 of the annular web 6. The reinforcing elements 21, 22 can be adapted, in particular, to the inner bevel of a pipe spigot end. The receiving spaces 11, 12 for receiving the pipe spigot ends each have a first region 23, 24 in which the inner radius of the inner wall 7 is larger than in a second region 25, 26. The width of the second region 25, 26 is approximately ¾ of the width of the respective receiving space 11, 12 and serves to center the respective pipe spigot end to be received.The inner edges 27, 28 of the insertion openings 4, 5 are rounded to ensure easy insertion of the pipes to be accommodated. Reinforcing ribs 30 are arranged on the outer side 29 of the pipe connection part 1, whereby the outer diameters of the reinforcing ribs and thus the height of the ribs relative to their base decrease from the insertion openings 4, 5 in the direction of the mirror symmetry axis 13. The outer sides 31, 32 of the annular beads 19, 20 each form a rib 33, 34. The distance between an insertion opening 4, 5 and an annular bead 19, 20, defining the socket neck 51, 52, is approximately ⅓ of the nominal diameter of the pipes to be connected.

[0035] In Fig. 2 is a pipe connection part 1 according to Fig. 1 with inserted pipes 35, 36. Identical components are provided with the same reference numerals. The pipes 35, 36 are received in the receiving spaces 11, 12. The pipe spigot ends 37, 38 each have an inner bevel 39, 40. Furthermore, the pipe spigot ends 37, 38 have a tapered area 41, 42 in which the inner radius of the pipe is larger than the nominal diameter. The area 41, 42 is adapted to the dimensions of the receiving space 11, 12. The inner diameter 43 of the pipes 35, 36 corresponds to the inner diameter 44 of the circumferential inner sleeve 8. Thus, when the pipe spigot ends 37, 38 are inserted into the receiving spaces 11, 12, the inner surface is as continuous as possible between the inner walls of the pipes 35, 36 and the inner sleeve 8. Ring seals 45, 46 are incorporated into the ring beads 19, 20.

[0036] In Fig. 3 is a pipe connection part 1 according to the Fig. 1 and 2when laying the pipes 35, 36 in a curve. Identical components are provided with the same reference numerals. By laying a curve with the pipes 35, 36, the pipe spigot ends 37, 38 are pressed together on the inside 47 of the curve, while the pipes 35, 36 are pulled apart on the outside 48 of the curve. The covering inner sleeve 8, which is arranged on the annular web 6, covers the resulting gaps 49, 50 between the pipe spigot ends 37, 38 and the annular web 6. This means that no open gaps are created in which, for example, impurities or the like can settle. On the outside 48 of the curve, the outer wall 29 of the pipe connection part 1 is stretched. In particular, the outer sides 31, 32 of the annular beads 19, 20 are also stretched.Because the annular beads 19, 20 are designed as ribs 33, 34, the outer sides of the annular beads 31, 32 can be stretched such that the pipe connection part 1 is not damaged by the curved routing of the pipes 35, 36. On the inner side 47 of the curve, the annular beads 31, 32 are compressed accordingly, allowing the acting forces to be absorbed.

[0037] In Fig. 41 shows a pipe connection part 1 with outer sleeves 53, 54 having ribs 30. Identical components are provided with the same reference numerals. The outer sleeves 53, 54 have a hollow cylindrical inner wall that is pushed over the outer areas of the socket necks 51, 52. In particular, the outer sleeves 53, 54 can be pressed over the socket necks 51, 52. For this purpose, the socket necks 51, 52 can have undercuts 55, 56 that enable secure assembly of the outer sleeves 53, 54. In particular, the undercuts 55, 56 can be designed such that slipping of the outer sleeves 53, 54 in the longitudinal direction of the pipe connection part 1 is prevented. The outer sleeves 53, 54 can be made, for example, of a metallic material, such as aluminum, or of a plastic.The plastic may be the plastic from which the pipe connection part 1 is made, but other materials may also be used.

Claims

1. Pipe connection part (1) for connecting the spigot ends (37, 38) of two pipes (35, 36), wherein the pipe connection part (1) has two socket regions (2, 3), wherein each socket region (2, 3) is designed to accommodate one pipe spigot end (37, 38) and has an insertion opening (4, 5) for inserting the pipe spigot ends (37, 38), wherein a circumferential annular web (6) is arranged along the inner wall (7) and transverse to the longitudinal extension of the pipe connection part (1) between the socket regions (2, 3) of the pipe connection part (1), wherein the circumferential annular web (6) has an inner collar (8) extending on both sides in the direction of the insertion openings (4, 5), wherein a circumferential accommodation space (11, 12) is respectively designed on both sides of the annular web (6) between the inner collar (8), the side walls (9, 10) of the annular web (6), and sections of the inner wall (7) of the pipe connection part (1) for at least sectional accommodation of the respective pipe spigot end (37, 38), wherein the socket regions (2, 3) respectively have at least one circumferential annular bead (19, 20) for receiving at least one annular seal (45, 46), wherein the outer sides (31, 32) of the annular beads (19, 20), in particular the outer side (31, 32) of the bead base, form, at least in sections, a circumferential rib (33, 34) on the outer side (29) of the pipe connection part (1), characterized in that the ribs (33, 34), formed by the outer sides (31, 32) of the annular beads (19, 20), have a smaller outer diameter than the adjacent rib (30) arranged further in the direction of the insertion opening (4, 5), and that the ribs (33, 34), formed by the outer sides (31, 32) of the annular beads (19, 20), have a larger outer diameter than the adjacent reinforcing rib (30) arranged further in the direction toward the middle of the pipe connection part (1).

2. Pipe connection part according to claim 1, characterized in that the inner collar (8), which extends on both sides, is circumferentially arranged along the inner radius of the annular web (6), and that a circumferential undercut is respectively formed on both sides with respect to the annular web (6) by the inner collar (8) arranged on the annular web (6).

3. Pipe connection part according to claim 1 or 2, characterized in that the inner diameter of the inner collar (8) corresponds to the inner diameter (43) of the pipes (35, 36) to be connected.

4. Pipe connection part according to one of claims 1 to 3, characterized in that the inner collar (8) is beveled at the respective edges facing the insertion openings (4, 5), wherein the bevel (15, 16) is formed on the side of the inner collar (8) facing away from the inner wall (7) of the pipe connection part (1), and wherein the material thickness of the inner collar (8) decreases, at least in sections, towards the outer edges of the inner collar (8).

5. Pipe connection part according to one of claims 1 to 4, characterized in that the sections of the inner wall (7) of the pipe connection part (1), which delimit the receiving spaces, correspond to the outer diameters of the pipe spigot ends (37, 38) to be accommodated.

6. Pipe connection part according to one of claims 1 to 5, characterized in that the inner diameter of the pipe connection part (1) is greater at the openings of the receiving spaces (11, 12) than in the areas of the receiving spaces (11, 12) adjacent to the annular web (6).

7. Pipe connection part according to one of claims 1 to 6, characterized in that the pipe connection part (1) has external ribs (30) on its outer wall (29), that the ribs (30) extend in the radial direction from the outer wall (29) of the pipe connection part (1), and that the ribs (30) are arranged parallel to one another.

8. Pipe connection part according to claim 7, characterized in that the ribs (30) in the area of the outer wall (29) of the insertion openings (4, 5) have a greater outer diameter than the ribs (30) in the middle area of the pipe connection part (1).

9. Pipe connection part according to one of claims 7 or 8, characterized in that the outer diameter of the ribs (30) arranged parallel to one another decreases from the insertion openings (4, 5) in the direction toward the middle of the pipe connection part (1).

10. Pipe connection part according to one of claims 1 to 9, characterized in that the socket regions (2, 3) respectively have a socket neck (51, 52), and that the socket necks (51, 52) have a length of approximately one-third of the diameter of the pipes (35, 36) to be accommodated.

11. Pipe connection part according to one of claims 1 to 10, characterized in that the inner collar (8) has on both sides, starting from the annular web (6), an inclination in the direction of the closest inner wall (7) of the pipe connection part (1).

12. Pipe connection part according to one of claims 1 to 11, characterized in that the annular bead (19, 20) is designed to be flexible at least in sections.