DE102017119201A1 - Connector and pipe connection with a connector - Google Patents

Abstract

The invention relates to a plug connector (1) having an end piece (2) and an insertion pin (10), wherein along a channel axis (A) a passage opening (3) extends from the end piece (2) through the insertion pin (10) and at an insertion end (4) of the insertion pin (10) through an outlet opening (5) opens, and wherein the insertion pin (10) on its outer side a first insertion tooth (13), the more with increasing distance from the outlet opening (5) of the channel axis ( A) stretches out. In addition, the invention relates to a pipe connection (100) with such a connector (1) and a first tube (50) with a pipe jacket (51) forms a pipe channel (52) at a pipe end (53) has an insertion opening (58). forms, wherein the insertion pin (10) of the connector (1) in the insertion opening (58) of the pipe channel (52) is inserted.

Description

The invention relates to a connector according to claim 1 and a pipe connection with such a connector according to claim 15.

Various connecting devices are known from the prior art for connecting a pipe to a destination element, for example a second pipe.

A disadvantage of the known connection means that they consist of a variety of components, which makes the production, logistics and assembly difficult and expensive. In addition, special tools are often necessary for assembly and automated assembly is sometimes not possible. Therefore, many pipes are already pre-produced in the intended length and provided with the connecting devices. As a result, there is a large number of part numbers, with correspondingly high production, storage and logistics costs.

Other problems in the prior art are too low pull-out forces between the connecting device and the pipe and a poor tightness.

In the prior art, the production of corrugated pipes with smooth nozzles is particularly expensive, in order to be able to attach a connecting device to the smooth connection. Because a great many different tube lengths are required, the extruder must be retrofitted for each individual tube length to produce the corrugated tubes. This leads to machine service lives. Because every single tube length has to be managed and stored, the costs are high.

The object of the invention is therefore to overcome the disadvantages of the prior art and to provide a connecting device with which a tube can be connected quickly, inexpensively, comfortably and with little logistics. This should be possible without tools and automated if possible. In addition, the tube length should be flexibly selectable. The solution should have a reliable tightness and high extraction forces.

Main features of the invention are specified in claims 1 and 15. Embodiments are the subject of claims 2 to 14 and 16 to 18.

The invention relates to a connector with an end piece and an insertion pin, wherein along a channel axis, a through hole extends from the end piece through the insertion pin and opens at an insertion end of the insertion pin through an outlet opening, and wherein the insertion pin has on its outer side a first insertion tooth, the extends farther away from the channel axis with increasing distance from the outlet opening.

The advantage of this is that the connector can be easily inserted with the insertion pin in a pipe. That's fast, easy and inexpensive. The first insertion tooth gets caught in the tube, which results in high extraction forces. It is also possible to perform the assembly on a tailor-made tube. This can be used by the meter and the logistics costs are low.

The channel axis can run straight or make a change of direction. In the region of the insertion pin, the channel axis should preferably run essentially straight or exactly straight.

In a preferred embodiment, the insertion pin is rotationally symmetrical. It can therefore be used for round tubes, which is the majority of all tubes.

Preferably, the first insertion pin has a cylindrical outer base surface beyond which protrudes the first insertion tooth. Thus, the tube is clamped and the first insertion tooth can get caught in the pipe jacket.

According to a further embodiment option, the first insertion pin has an insertion bevel at the insertion end. This makes it easy to insert into a pipe end.

A simple low-cost construction is optionally achieved in that the insertion pin is formed integrally or in one piece with the end piece. Furthermore, the insertion pin and the end piece preferably comprise plastic or metal. In particular, injection molding and casting processes are suitable for producing the insertion pin and the end piece.

Furthermore, the end piece preferably forms a tube stop which extends farther away from the channel axis than the first insertion tooth. Thus, the insertion depth of the connector is defined, which easily manages a correct installation. For this purpose, the pipe stop should be aligned transversely, in particular substantially perpendicular, to the channel axis. Preferably, the pipe stop is formed by a circumferential shoulder or a circumferential rib.

The subsequent to the insertion end portion of the through hole is preferably cylindrical, in particular to the tail or the optional pipe stop. This can be a stable insertion with maximum cross-section of the passage opening are provided. In order to restrict a cross-sectional constriction of the flow channel to the most necessary, the lying in the region of the tail portion of the passage opening should taper in the direction of the insertion, preferably conical or frusto-conical.

The design of the first insertion tooth is preferably selected so that the first insertion tooth forms an insertion bevel. This allows the insertion pin to push with little force into a pipe.

After a special molding, the first insertion tooth on a cone (blunt) shaped outer surface. This succeeds a harmonious postponement.

Furthermore, the outer circumferential surface of the first insertion tooth should have a pitch relative to the channel axis that is less than 30 degrees and preferably less than 25 degrees. As a result, the slope is still so low that the pushing is easy.

Optionally, it is provided that the first insertion tooth on the end-oriented side transversely, in particular substantially perpendicular, springs back to the channel axis. Thus, the first insertion tooth is stable and at the same time a sharp edge is provided with which the first insertion tooth can get caught in the tube.

In a specific embodiment, the first insertion tooth is arranged adjacent to a first sealing ring, in particular adjacent to the channel axis, and in particular adjacent thereto. With such a sealing ring, the tightness of the connector can be increased with a pipe. The first Einführzahn then has not only the task of entanglement, but also the lifting of the tube on the sealing ring, without damaging the latter. The seal allows in particular in combination with a corrugated pipe a tight plug connection. The corrugated pipes can thus be made without smooth pipe socket and simply stored as a coil. Changeover times of the extruder omitted. In production, the corrugated pipe can then be cut to length and pushed directly onto the insertion pin. With the sealing ring, a process-tight tightness is ensured, whereas the pull-out strength is caused against slipping substantially by the Einführzahn or optional further Einführzähne.

According to one embodiment, the first sealing ring has an outer diameter which preferably corresponds approximately to the largest diameter of the first insertion tooth, more preferably projects beyond 20% of the sealing ring cross section the first insertion tooth, and particularly preferably, the first sealing ring has an outer diameter which is at most so large is like the largest diameter of the first insertion tooth. Thus, the first insertion tooth can easily and comfortably guide the tube over the first sealing ring. The seal is mainly caused by the constriction of the tube behind the Einführzahn.

In a specific embodiment, a first seal seat is formed adjacent to the first insertion tooth and on the end-oriented side of the first insertion tooth.

The first sealing ring should be arranged in the first sealing seat. With the aid of the sealing seat, the sealing ring is held in position along the passage opening or channel axis. The first sealing ring may be, for example, an O-ring. This can be pushed over the first insertion tooth for assembly. For this purpose, the first sealing ring should have an elastic material.

In particular, a design contributes to this, according to which the first seal seat is formed between the first insertion tooth and a first shoulder. This first paragraph preferably has a cylindrical outer surface. Thus, the sealing ring is supported over the entire circumference against displacement, whereby damage is avoided. In addition, a circumferentially uniform support of the tube is achieved behind the sealing ring (if it rests), whereby a uniform seal with the first sealing ring is achieved.

Preferably, the outer diameter of the first paragraph corresponds to the largest diameter of the first insertion tooth. Thus, the sealing ring is equally supported in both directions and the constriction and pinching of the sealing ring through the tube is uniform and well predetermined. A space-saving design with additional hooking with the tube succeeds when the first paragraph is formed by a circumferential first rib.

Furthermore, it is provided according to an optional embodiment that the insertion pin has on its outer side at least one second insertion tooth, namely exactly one second insertion tooth or exactly two second insertion teeth or at least two second insertion teeth, which extends further away from the channel axis with increasing distance from the outlet opening , With the second Einführzahn the tightness is increased and higher extraction forces are achieved. For this purpose, the second insertion tooth should be arranged offset along the passage opening to the first insertion tooth. The second insertion tooth preferably has a cone (dull) shaped outer surface. In addition, the second insertion tooth should form an insertion bevel. The lateral surface of the second insertion tooth preferably has a pitch relative to the channel axis which is less than 30 degrees, preferably less than 25 degrees and further preferably less than 20 degrees. Ideally, it is provided that the second insertion tooth on the end-oriented side transversely, in particular substantially perpendicular, springs back to the passage opening. The advantages of the individual optional technical details of the second insertion tooth correspond to those described for the corresponding design options of the first insertion tooth.

According to a special embodiment, the second insertion tooth is arranged adjacent to a second sealing ring, in particular adjacent to the channel axis, and in particular adjacent thereto. This sealing ring increases the tightness between the insertion and a deferred tube. The second sealing ring may be an O-ring. In addition, the second sealing ring may comprise an elastic material. Preferably, a second seal seat is formed along the channel axis adjacent to the second insertion tooth and on the side of the second insertion tooth aligned with the end piece. The second seal seat may be formed between the second insertion tooth and a second step. In addition, the second paragraph may have a cylindrical outer surface. In this case, the outer diameter of the second paragraph should correspond to the largest diameter of the second Einführzahns. Preferably, the second shoulder is formed by a circumferential second rib. Furthermore, the second sealing ring should have an outer diameter which preferably corresponds approximately to the largest diameter of the second insertion tooth, more preferably projects beyond 20% of the sealing ring cross section the second insertion tooth, and particularly preferably, the second sealing ring has an outer diameter which is at most so large like the largest diameter of the second insertion tooth. The advantages of the individual optional technical details of the second sealing ring and the second sealing seat correspond to those described with respect to the corresponding design options of the first sealing ring and the first sealing seat.

In a further embodiment variant, it is provided that the insertion pin has on its outside at least one third insertion tooth, namely exactly one third insertion tooth or exactly two third insertion teeth or at least two third insertion teeth, which extends further away from the channel axis with increasing distance from the outlet opening. With the third Einführzahn the tightness is increased and higher extraction forces are achieved. In this case, the third insertion tooth should be arranged offset along the channel axis to the first and / or second insertion tooth. This third insertion tooth preferably has a conical (blunt) outer peripheral surface. In addition, the third insertion tooth should form an insertion bevel. The insertion bevel of the third insertion tooth preferably has a pitch relative to the channel axis which is less than 30 degrees, preferably less than 25 degrees and more preferably less than 20 degrees. The advantages of the individual optional technical details of the third insertion tooth correspond to those described for the corresponding design options of the first insertion tooth.

Furthermore, an embodiment is suitable in which the third insertion tooth on the end-oriented side transversely, in particular substantially perpendicular, springs back to the through-opening. This makes it possible to provide a sharp edge with which the third insertion tooth can get caught. Nevertheless, the third Einführzahn is stable.

According to a special embodiment, no sealing ring is arranged adjacent (in particular along the channel axis) to the third insertion tooth and on the end-oriented side of the third insertion tooth, and preferably no seal seat is formed, in particular until the next insertion tooth or until the pipe stop. Without a sealing ring, the third insertion tooth can engage deeper into the tube jacket, because the tube can constrict behind the third insertion tooth without hitting a sealing ring, whereby particularly high extraction forces can be achieved.

Furthermore, it is provided in a special embodiment that the tail forms a pipe stop, which extends farther away from the channel axis than the first, second and third insertion tooth. This prevents the pipe from being pushed over the pipe stop.

According to an optional embodiment, the pitch of the insertion bevel of the first insertion tooth is greater than the slopes of the insertion bevels of the second and / or the third insertion tooth. The first insertion tooth, which is preferably located on the side of the insertion end, thus forms the greatest counterforce when pushed on, so that the tube easily slides on overcoming the first insertion tooth. The slopes of the lead-in bevels of the second and third insertion teeth are preferably the same size.

According to a special embodiment, the smallest diameter of the first insertion tooth is smaller than the respective smallest diameter of the second and the third insertion tooth. Thus, the insertion with the narrow end easy be pushed and the pipe jacket is stretched. The smallest diameters of the second and third insertion teeth are preferably the same size. Thus, the second and third Einführzahn can act similarly in terms of pull forces and sealing.

In one embodiment variant, the largest diameters of the first, second and third insertion teeth are the same size. This allows all three insertion teeth to act similarly in terms of pull-out forces and sealing.

The first and second seal seats should be identical. This also applies to the first and the second sealing ring. Both contribute to a simple cost-effective design.

In a preferred embodiment, the connector has exactly a first insertion tooth, exactly a second insertion tooth and exactly a third insertion tooth. The three insertion teeth achieve a high density and withstand high extraction forces. In addition, insertion teeth can be combined with and without seal or seal seat. The second insertion tooth should be arranged between the first insertion tooth and the end piece. The third insertion tooth should be arranged between the first insertion tooth and the end piece. In addition, the third insertion tooth should be arranged between the first insertion tooth and the second insertion tooth.

High pull-out forces and high tightness can be achieved if a cylindrical outer intermediate section is arranged between the pipe stop and the nearest insertion tooth. It is also preferable if a cylindrical outer intermediate section is arranged between adjacent insertion teeth, preferably between all adjacent insertion teeth. The resulting distances allow the pipe a large constriction, whereby the extraction forces are high by good hooking. In addition, the pipe may possibly also be supported. The first intermediate section preferably has a smaller diameter before the first insertion tooth than the further intermediate sections. Thus, the tube at this point need not be stretched as far as closer to the tail and can be easily postponed.

The invention also relates to a pipe joint with a connector as described above and below, and a first tube which forms a pipe with a pipe jacket which forms an insertion opening at a pipe end, wherein the insertion of the connector inserted into the insertion opening of the pipe channel is, in particular linear without rotation, so preferably inserted. As a result, a simple and inexpensive connection is provided, which in particular also works with individual tube lengths of endless tubes. In this case, the first tube should have an inner diameter which is smaller than the largest diameter of the insertion pin. As a result, a clamping is achieved, which contributes to the tightness and high extraction forces. For a simple pushing on the outer diameter of the Einführzapfens at the insertion end should be smaller than the inner diameter of the first tube, which can be achieved in particular by means of the optional insertion bevel. If the insertion pin provides intermediate sections, a vote is appropriate in which the inner diameter of the first tube is smaller than the diameter of the insertion pin in the region of the intermediate sections. Thus, the tube can constrict in the region of the intermediate sections and create the insertion pin. Preferably, the connector does not extend into an area on the outside of the tube shell.

In a particular embodiment variant, the first tube is a corrugated tube. In such a way, on the one hand, the insertion teeth can hook well and on the other hand create the optional seal or seals for sealing. The biggest advantage is that endlessly manufactured corrugated tubes without end-side smooth sections can be combined with the connector. These are inexpensive to manufacture and manage.

It is particularly advantageous for a stable connection when the first insertion tooth protrudes into a crest of the outer surface of the tubular jacket. Here he can hook up formally.

If the first insertion tooth is arranged adjacent to a first sealing ring, an embodiment is suitable in which the first sealing ring rests against the inner surface of the tubular jacket. Preferably, it lies in the region of a wave trough of the outer surface on the inner surface of the tubular jacket.

Furthermore, the passage opening of the connector can have an inlet opening in the region of the end piece. Optionally, a second pipe or a housing or a container is connected to the inlet opening.

If necessary, it can be provided that the first pipe is clamped between the insertion pin and a separate pipe clamp. As a result, a higher density and higher extraction forces can be achieved. For cost reasons, however, it is preferable in many technical applications, if no additional fixative except the connector are available.

Coupling elements may be formed between the end piece and the second pipe, via which end piece and the second pipe are connected to one another. In a very special embodiment, the connector has a second insertion pin, which in turn may have the individual aforementioned optional features.

• 1 einen Längsschnitt durch einen Steckverbinder; und
• 2 einen Längsschnitt durch eine Rohrverbindung mit einem Steckverbinder und einem Rohr.

Further features, details and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. Show it:

• 1 a longitudinal section through a connector; and
• 2 a longitudinal section through a pipe joint with a connector and a pipe.

1 shows a longitudinal section through a connector 1 with a tail 2 and an insertion pin 10 , which are integrally or integrally formed with each other and rotationally symmetrical. The insertion pin 10 and the tail 2 For example, they may be made of plastic or metal. A passage opening 3 extends through the tail 2 and through the insertion pin 10 , The passage opening 3 is in the area of the insertion pin 10 cylindrical and in the area of the tail 2 cone-shaped or frustoconical configured. In particular, the tapered in the region of the tail 2 lying portion of the passage opening 3 in the direction of the Einführzapfens 10 ,

At an end insertion 4 of the insertion pin 10 opens the passage opening 3 through an exit opening 5 out. At this introductory 4 is an outer insertion bevel 6 at the insertion pin 10 educated.

The insertion pin 10 has on its outside exactly a first Einführzahn 13 , exactly a second insertion tooth 20 and exactly a third insertion tooth 30 on. Here are the first, second and third Einführzahn 20 each along the passage opening 3 staggered to each other. In particular, the second and third insertion tooth 20 between the first insertion tooth 13 and the tail 2 , wherein the third insertion tooth 30 between the first insertion tooth 13 and the second insertion tooth 20 is arranged.

The first, second and third insertion teeth 13 . 20 . 30 each stand with increasing distance from the outlet opening 5 further from the passage opening 3 or their channel axis A path. For this purpose, the first, second and third Einführzahn 13 . 20 . 30 each have a frusto-conical outer surface, whereby in each case an insertion bevel is formed. The outer lateral surfaces of the first, second and third insertion teeth 13 . 20 . 30 each have a pitch relative to the passage opening 3 or to the channel axis A the passage opening 3 which is less than 25 degrees. The gradients of the second and third insertion teeth 20 . 30 are the same size and smaller than 20 degrees. Visible is the slope of the insertion bevel of the first Einführzahns 13 greater than the pitches of the chamfers of the second and third Einführzahns 20 . 30 , In addition, the smallest diameter of the first Einführzahns 13 smaller than the smallest diameter of the second and the third Einführzahns 20 . 30 , The smallest diameters of the second and third insertion teeth 20 . 30 are again the same size. In contrast, the largest diameters of the first, second and third Einführzahns 13 . 20 . 30 each same size.

Furthermore, it can be seen that the insertion pin 10 on its outside in front of the insertion teeth 13 . 20 . 30 that is, in the direction of the introductory 4 pointing side, a cylindrical intermediate section 17 . 24 . 31 having. A cylindrical fourth intermediate section 8th of the insertion pin 10 is on its outside just before the end section 2 arranged, in particular between the second insertion tooth 20 and the tail 2 , The first intermediate section 17 before the first insertion tooth 13 has a smaller diameter than the other intermediate sections 8th . 24 . 31 which all have the same diameter. The other intermediate sections 8th . 24 . 31 thereby form a cylindrical outer base surface of the insertion pin 10 out, over which the first, second and third Einführzahn 13 . 20 , 30 stand out.

Furthermore, the tooth flanks, which are on the tail 2 aligned side at the highest point of the respective Einführzahns 13 . 20 . 30 on the outer surface, at the first, second and third Einführzahn 13 . 20 . 30 each transverse, in particular substantially perpendicular, to the passage opening 3 or the channel axis A the passage opening 3 aligned.

The first insertion tooth 13 is adjacent to a first sealing ring 14 and the second insertion tooth 20 adjacent to a second sealing ring 21 arranged. The outer diameter of the first and second sealing ring 14 . 21 are the same size and substantially correspond to the largest diameter of the first and second insertion tooth 13 . 20 , Adjacent to the first and second insertion teeth 13 . 20 is always on the tail 2 aligned side of the first and second insertion tooth 13 . 20 a seal seat 15 . 22 formed, in which the first and second sealing ring 14 . 21 is arranged. The first and second seal seats 15 . 22 are identical.

In particular, the first seal seat 15 between the first insertion tooth 13 and a first paragraph 16 and the second seal seat 22 between the second insertion tooth 20 and a second paragraph 23 educated. Here are the first and second paragraph 16 . 23 each formed by a circumferential rib with a cylindrical outer surface. The outside diameters of the first and second paragraphs 16 . 23 correspond to the largest diameter of the first and second insertion teeth 13 . 20 ,

The first and second sealing ring 14 . 21 are identical. In particular, in each case an O-ring is used, which comprises an elastic material or consists of such.

Furthermore, the tail forms 2 a pipe stop 7 off, extending radially further from the channel axis A wegerstreckt as the first, second and third Einführzahn 13 . 20 . 30 , The pipe stop 7 is transverse, in particular substantially perpendicular, to the passage opening 3 or their channel axis A aligned. In addition, the pipe stop 7 formed by a circumferential shoulder or a circumferential rib with a cylindrical outer surface. The area, which is indicated by a cutting line and attached to the tail 2 can be continued in many ways. Here, for example, seals and coupling means may be arranged for a second tube. However, it may also, for example, connect a housing. This area is no longer considered to belong to the connector and can also be designed asymmetrically.

In contrast to the first and second insertion tooth 13 . 20 is adjacent as well as on the tail 2 aligned side of the third Einführzahns 30 no sealing ring arranged. It is adjacent to the third insertion tooth 30 not even a seal seat formed.

2 shows a longitudinal section through a pipe connection 100 with a connector 1 as he in 1 is shown and a first pipe 50 ,

The first pipe 50 has a pipe jacket 51 with an outer surface 56 and an inner surface 57 , With the pipe jacket 51 becomes a pipe channel 52 educated. The pipe channel 52 ends at a pipe end 53 that has an insertion opening 58 for the connector 1 formed. The first pipe 50 is a corrugated pipe, being on the outside surface 56 crests 54 and troughs 55 are formed.

The insertion pin 10 of the connector 1 is in the slot 58 of the pipe channel 52 inserted, in particular linear without rotation, that is plugged. The pipe end 53 stands frontally with the pipe stop 7 in contact. The first pipe 50 is shown in its stretched form. The smaller pipe diameter of the first pipe 50 in the area adjacent to the insertion 10 shows how strong the first pipe 50 above the insertion pin 10 is stretched. The insertion pin 10 deforms at most slightly, but rather not at all.

Recognizable points the first tube 50 in the unstretched state, an inner diameter which is smaller than the largest diameter of the Einführzapfens 10 , In particular, the inner diameter of the first tube 50 also smaller than the diameter of the insertion pin 10 in the area of intermediate sections 8th . 14 . 24 . 31 , Due to the insertion bevel 6 is the diameter of the insertion pin 10 at the introductory 4 but smaller than the inner diameter of the first tube 50 ,

Preferably, the first, the second and the third Einführzahn protrudes 13 . 20 . 30 each from the inside into a wave mountain 54 the outer surface 56 of the pipe jacket 51 into it. This is the pipe jacket 52 positive fit on the insertion teeth 13 . 20 . 30 hooked.

The first and second sealing ring 14 . 21 is also independent of the embodiment shown, preferably in each case in the region of a wave trough 55 the outer surface 57 on the inner surface 57 of the pipe jacket 51 at. Preferably, the wave trough is 55 on the inside of the pipe jacket 51 narrower than the sealing seats 15 . 22 are wide. This allows the entire trough 55 in the seal seat 15 . 22 fall into it, in particular so far that a balance of forces between the constricting force of the tube shell 51 and the counterforce of the sealing rings 14 . 21 is made.

As you can see, the connector extends 1 not in an area on the outside of the pipe jacket 51 or over the outer surface 56 , This is a slim structure.

Notwithstanding 1 is the representation of 2 in the area of the tail 2 extended. An entrance opening 9 the passage opening 3 in the area of the tail 2 however, is still out of the picture. At the entrance opening 9 a second tube can be connected, for which optional coupling means between the tail 2 and the second tube can be formed.

The invention is not limited to one of the above-described embodiments, but can be modified in many ways.

In particular, more than one second insertion tooth, namely two or more second insertion teeth, and / or more than a third insertion tooth, namely two or more third insertion teeth are providable.

In addition, components such as coupling means or a housing can be connected to the end piece. These may be formed integrally with the tail. In addition, these can have an asymmetrical shape.

All of the claims, the description and the drawings resulting features and advantages, including design details, spatial arrangements and method steps may be essential to the invention both in itself and in various combinations.

LIST OF REFERENCE NUMBERS

1

Connectors

2

tail

3

Through opening

4

introductory

5

outlet opening

6

chamfer

7

tube stop

8th

fourth intermediate section

9

inlet opening

10

insertion pin

13

first insertion tooth

14

first sealing ring

15

first seal seat

16

first paragraph

17

first intermediate section

20

second insertion tooth

21

second sealing ring

22

second seal seat

23

second paragraph

24

second intermediate section

30

third insertion tooth

31

third intermediate section

50

first pipe

51

pipe casing

52

tube channel

53

pipe end

54

Wellenberg (the outer surface)

55

Wave trough (the outer surface)

56

outer surface

57

palm

58

insertion opening

100

pipe connection

A

channel axis

Claims (18)

Connector (1) having an end piece (2) and an insertion pin (10), wherein along a channel axis (A) has a through hole (3) from the end piece (2) through the insertion pin (10) and at an insertion end (4) of Insertion pin (10) through an outlet opening (5) opens, and wherein the insertion pin (10) on its outer side a first Einführzahn (13) which extends with increasing distance from the outlet opening (5) further away from the channel axis (A). Connector (1) to Claim 1 , characterized in that the insertion pin (10) is rotationally symmetrical. Connector (1) according to one of Claims 1 or 2 , characterized in that the first insertion pin (10) at the insertion end (4) has an insertion bevel (6). Plug connector (1) according to one of the preceding claims, characterized in that the end piece (2) forms a pipe stop (7) which extends farther away from the channel axis (A) than the first insertion tooth (13). Connector (1) according to any one of the preceding claims, characterized in that the first insertion tooth (13) has a conical outer surface. Connector (1) according to one of the preceding claims, characterized in that the first insertion tooth (13) on the end piece (2) aligned side transverse to the channel axis (A) springs back. Connector (1) according to one of the preceding claims, characterized in that the first insertion tooth (13) adjacent to a first sealing ring (14) is arranged. Connector (1) according to one of the preceding claims, characterized in that adjacent to the first insertion tooth (13) and on the end piece (2) aligned side of the first insertion tooth (13), a first seal seat (15) is formed. Connector (1) to Claim 8 , characterized in that the first seal seat (15) between the first insertion tooth (13) and a first shoulder (16) is formed. Plug connector (1) according to one of the preceding claims, characterized in that the insertion pin (10) has on its outer side at least one second insertion tooth (20) which extends further away from the channel axis (A) with increasing distance from the outlet opening (5) , Connector (1) to Claim 10 , characterized in that the second insertion tooth (20) is arranged adjacent to a second sealing ring (21). Connector (1) according to one of the preceding claims, characterized in that the insertion pin (10) has on its outer side at least one third insertion tooth (30) which extends with increasing distance from the outlet opening (5) further away from the channel axis (A) , Connector (1) to Claim 12 , characterized in that adjacent to the third insertion tooth (30) and on the end piece (2) aligned side of the third Einführzahns (30) no sealing ring is arranged. Connector (1) according to a combination of Claims 11 and 13 , characterized in that it has exactly one first insertion tooth (13), exactly one second insertion tooth (20) and exactly one third insertion tooth (30). Pipe connection (100) with a connector (1) according to one of the preceding claims and a first pipe (50) forming with a pipe jacket (51) a pipe channel (52) forming at a pipe end (53) an insertion opening (58) , wherein the insertion pin (10) of the connector (1) in the insertion opening (58) of the pipe channel (52) is inserted. Pipe connection (100) according to Claim 15 , characterized in that the first tube (50) is a corrugated tube. Pipe connection (100) according to Claim 16 , characterized in that the first insertion tooth (13) projects into a corrugation peak (54) of the outer surface (56) of the tubular jacket (51). Pipe connection (100) according to one of Claims 16 or 17 combined with Claim 7 , characterized in that the first sealing ring (14) rests against the inner surface (57) of the tubular jacket (51).

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