DE102012106232B3 - Pipe joint for use in exhaust tube system for axially joining exhaust gas sleeve pipe with exhaust tube, has retainer axial side turned away from another axial side to secure joint in prefixing state axial at sleeve of pipe - Google Patents

Abstract

The joint has prefixing units (7) for pre-assembly of the joint at an exhaust gas sleeve pipe. A partial ring (1) includes large diameter in a resulting prefixing state, and fixing agents (8) are produced in a fixing state in an axial region between two intervention units. An axial safety device (25) radially engages behind a sleeve of the exhaust gas sleeve pipe on one of seal retainer axial sides, where one of the sides is turned away from the other axial side to secure the pipe joint in the prefixing state axial at the sleeve of the exhaust gas sleeve pipe. An independent claim is also included for a method for manufacturing an exhaust tube system with a pipe joint.

Description

The invention relates to a pipe connector for axially connecting together a first exhaust pipe with a second exhaust pipe, in particular a Abgaswellrohr according to the preamble of claim 1 and an exhaust pipe system according to claim 6 and a method for assembling an exhaust pipe system according to claim 10. The pipe connector comprises two with fixing , In particular latching means connectable to a closed ring, in particular latchable partial rings.

Trained as a plastic injection molded pipe connector for connecting two plastic exhaust pipes are well known. For example, the applicant already has in the DE 10 2005 045 482 A1 such pipe connector described. The known pipe connectors are characterized in that they comprise two mutually latchable sub-rings, which cooperate via end-side engaging means radially inwardly with the assembled exhaust pipes and connect them so fast with each other. The known pipe connector has proven itself. However, there are efforts to make the installation of an exhaust pipe system more comfortable. In particular, it should also be avoided that the partial rings to be connected to each other at the construction site are lost.

From the EP 2 405 171 A1 and the DE 10 2007 039 827 A1 Pipe connectors are known from the prior art, wherein from the EP 2 405 171 A1 known pipe connector by means of screw-nut combinations can be fixed and from the DE 10 2007 039 827 A1 known pipe connector consists of fixed part rings and comprises a clamp locking system.

Based on the above-mentioned prior art, the object of the invention is therefore to specify a pipe connector which makes possible an easier assembly of exhaust pipes to an exhaust pipe system. In particular, a loss of the pipe connector components should be avoided. Furthermore, the object is to provide an exhaust pipe system with a corresponding pipe connector and a simplified assembly process.

This object is achieved with regard to the pipe connector with the features of claim 1, with regard to the exhaust pipe system having the features of claim 6 and with regard to the assembly method having the features of claim 10. Advantageous developments of the invention are specified in the subclaims. All combinations of at least two features disclosed in the description, the claims and / or the figures fall within the scope of the invention.

In order to avoid repetition, features disclosed according to the device should also be regarded as being in accordance with the method and be able to be claimed. Likewise, according to the method disclosed features should be considered as device disclosed and claimed claimable.

The invention is based on the idea to make the tube connector formed from two partial rings pre-assembled so that it can be delivered already mounted on the sleeve of a first exhaust sleeve pipe. In this way, a loss of the partial rings can be prevented and moreover, the partial rings can already be aligned relative to each other so that they can be simplified, in particular by compressing the partial rings from a Vorfixierposition be transferred to the final fixing position. In order to ensure a prefixing, the pipe connector according to the invention comprises in addition to, in particular designed as locking means fixing Vorfixiermittel for pre-assembly of the pipe connector to the first exhaust sleeve, wherein the Vorfixiermittel are designed and arranged such that with these the partial rings, especially in the factory, to a Ring are prefixed, said ring defines a Vorfixierzustand and in this prefixed state has a larger diameter than in the (final) fixing state produced with the fixing agents. Preferably, the diameter of the pipe connector, in particular the diameter of the second engagement means in Vorfixierzustand is such that this (something) is greater than the outer diameter of the second exhaust pipe and / or at least as large as the insertion diameter of the sleeve tube, so that the second exhaust pipe at The first exhaust sleeve pipe prefixed pipe connector can be axially inserted into the sleeve of the first exhaust sleeve pipe. So that this Vorfixierring is secured in the axial direction and the Vorfixierring not lost or has only a small axial movement play are in addition to the first engagement means, the annular, radially outwardly projecting, formed for the inner receiving a sealing ring seal seat on a first axial Seal receiving axial side engage behind in the radial direction, axial securing means are provided, which are arranged in a region between the first and the second engagement means and engage behind the seal receptacle on a second, facing away from the first seal receiving axial side seal receiving axial side. The second engagement means are preferably designed to engage in a wave trough of the second exhaust pipe, which is preferably designed as an exhaust gas corrugated pipe.

In summary, the basic idea of the invention is thus to provide axial securing means which, together with the first engagement means engage behind the seal receptacle of the first axial sleeve tube, wherein the axial distance between the axial securing means and the first engagement means preferably corresponds to the axial extent of the annular seal receptacle plus a game. In addition, according to the invention, prefixing means are provided in addition to the (final) fixing means in order to connect the partial rings to a ring with a larger diameter than the end ring resulting from fixing of the fixing means. The pipe connector can preferably rotate in the prefixed state in the circumferential direction around the seal receptacle, wherein the fixing means are preferably designed such that this is not possible or only with difficulty, ie, that the pipe connector in the fixing state clamps the pipes to be joined together axially.

It is particularly expedient if the two partial rings of the pipe connector are formed as identical, preferably designed as plastic injection molded semi-circular rings, whereby the pipe connector can be produced with only one injection molding tool. The fixing means, preferably designed as latching means, preferably project beyond the semicircles which can be joined together to form a full circle in the circumferential direction.

Preferably, the prefixing means are designed as latching means, which are spaced in the circumferential direction to the fixing means. It is even more preferable if the prefixing means and the fixing means each comprise a latching lug, wherein the two latching lugs can cooperate with a common latching projection, of course not simultaneously, but only as an alternative.

It is particularly preferred if the latching lugs Vorfixiermittel and the latching means are arranged at the first circumferential ends of each partial ring and at the circumferentially spaced circumferential ends of the latching projections, so that the latching lugs of the first partial ring with the latching projection of the second partial ring and the latching lugs of the second Partial ring with the latching projection of the first part ring can cooperate latching.

It is particularly useful if the axial securing means point less far radially inward or protrude than the fixing means so as to be able to overpress the partial rings radially inwardly elastically for fixing the fixing means. In other words, a circumferential gap radially between the axial securing means and the first exhaust sleeve pipe in the pre-fixing state is larger than such a circumferential gap between the first engaging means and the first exhaust sleeve pipe, and preferably the circumferential gap between the first engaging means and the first exhaust sleeve pipe is at least approximately zero in the assembled state.

The invention also leads to an exhaust pipe system with a first, preferably designed as a plastic pipe exhaust pipe and a, preferably designed as a plastic injection molded part, designed according to the concept of the invention pipe connector.

Preferably, the pipe connector is prefixed to the first sleeve tube, wherein with the help of Vorfixiermittel the two partial rings are pre-assembled into a ring having a larger diameter than a ring resulting by fixing the fixative. The partial rings preferably surround the sealing receptacle of the sleeve tube in the prefixed state, wherein the sealing receptacle is used as an axial securing element, which is radially inwardly engaged on the first Dichtungsaufnahmeaxialseite by the first engagement means and on the second, in the direction of second engagement means facing seal receiving axial side of the axial securing means.

These may be ring-shaped, or what is preferred, as preferably substantially tangentially with respect to the first exhaust sleeve pipe extending webs, in principle, a single web is sufficient. It is even more preferable, in particular for identical partial rings, if such a web is provided on each partial ring.

The exhaust pipe system can be extended in which a second, preferably designed as a corrugated tube second exhaust pipe is fixed to the first sleeve tube, with the help of the pipe connector, wherein the two exhaust pipes are nestable and in the fixed state of the pipe connector with the two tubes each on cooperates radially inwardly facing engagement means and wherein even in the fixed state, the seal receptacle of the first pipe connector is engaged behind in the radial direction, on the one hand of the first engagement means and in addition of the axial securing means.

Preferably, the corrugated pipe in the inserted into the sleeve of the first exhaust sleeve pipe section on a non-corrugated, smooth cylindrical fixing section.

The invention also leads to a method for mounting an exhaust pipe system according to the invention using a pipe connector according to the invention. In this case, first the second exhaust pipe is inserted into a sleeve of the first exhaust sleeve pipe and the preassembled pipe connector is transferred from the prefixed state in the fixing state in which the two exhaust pipes are axially secured to each other on the engagement means of the partial rings of the pipe connector.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings.

These show in:

1a to 1e : different, partially cut overall and detailed representations of one of two identical sub-rings for mounting a pipe connector,

2a to 2d FIG. 2: different partially sectioned views of an exhaust pipe system with a pre-fixed (pre-assembled) pipe joint, and FIG

3a to 3c : different, partially sectioned views of a pipe system comprising two nested exhaust pipes, which are axially secured by means of the pipe connector.

In the figures, like elements and elements having the same function are denoted by the same reference numerals.

In the 1a to 1e is a trained as a plastic injection molded part first ring 1 shown with an identical second subring 2 (S. 2d ) to a pipe connector 3 is connectable.

The first part ring 1 is formed as a semi-circular ring and has at a first circumferential end 4 a Fixiermittelrastnase 5 and a circumferentially spaced, further circumferentially projecting prefixer latch 6 on. The prefixer latch 6 is part of prefixing agents 7 , in addition to the Vorfixiermittelrastnase 6 a latching receptacle and a further Rastaufnahmenvorfixiermittel Rastnasenkombination include.

The prefixing agents 7 serve to the first part ring 1 with the second part ring 2 to a pipe connector 3 vorzumontieren, the apparent, from the 2a to 2d resulting ring has a larger diameter than the one in the 3a to 3c shown ring, which results when the two rings with the help of fixative 8th to be assembled.

The two locking lugs 5 . 6 are on a radially elastically adjustable, circumferentially projecting tongue 9 provided, wherein the Fixiermittelrastnase 5 in the circumferential direction between the Vorfixiermittelrastnase 6 and the solid (not free) end of the tongue 9 are located.

At a circumferential direction from the first circumferential end 4 remote from the second circumferential end 10 of the first partial ring 1 there is a snap-in receptacle 11 for cooperation with a prefixing agent nose and with a fixing agent nose of a further (second) partial ring 2 , The snap-in receptacle 11 is formed in the manner of a receiving pocket and includes a radially inwardly facing locking element 13 , which is rigidly formed with the on the elastic tongue 9 provided latching noses alternatively cooperate, wherein the mating of the two partial rings 1 . 2 First, the Vorfixiermittelrastnase with the locking receptacle 11 comes into locked engagement and so defines a Vorfixierzustand before by further compression of the first part ring and the second part ring 1 . 2 in a diametrical direction the Fixiermittelrastnase 5 latched in the locking receptacle.

How to get out 1a and 1c results, includes the first sub-ring 1 in the region of a first axial end 13 Partial annular, radially inwardly facing first engagement means 14 to, how out 3c it can be seen, radial engaging behind a gasket 15 a first exhaust sleeve pipe 16 , The gasket holder 15 is seen from the inside as an inner circumferential groove for receiving a, here designed as a three-lip seal ring seal 17 (preferably a multi-lip seal) is formed. The gasket holder 15 is radially outward and, as mentioned, on a first seal receiving axial side 18 from the first intervention means 14 engaged behind.

In the region of the second axial end facing away from the first axial end 19 of the pipe connector are second, radially inwardly facing engagement means 20 , which in the assembled state with the second exhaust pipe 21 axially engage together, wherein in the embodiment shown, the second engagement means 20 continue to project radially inward than the first engagement means 14 so in a wave trough 22 of the second exhaust pipe designed as a corrugated tube 21 intervene. The second exhaust pipe 21 has a shaft-free axial section 23 on which it is in a thimble 24 of the first exhaust sleeve pipe 16 is received, such that the ring seal 17 radially outward on the axial section 23 is applied.

Furthermore, the first part ring comprises 1 radially inwardly facing axial securing means 25 for engaging behind the gasket holder 15 on a second seal receiving axial side 26 , The axial securing means 25 are not circumferentially formed circumferentially, but as a tangential web, which protrudes less far radially inward as the first engagement means 14 ,

In the 2a to 2d is an exhaust pipe system 27 shown in a Vorfixierzustand, in which the two partial rings 1 . 2 prefixed with the help of Vorfixiermittel. For this purpose, the Vorfixiermittelnase the first part ring acts 1 with the locking receptacle of the second part ring 2 together and the Vorfixiermittelnase the second sub-ring with the locking receptacle of the first part ring, so that in the 2a and 2d shown ring having a larger diameter than a final ring. This is especially clear 2d , There it can be seen that the first circumferential end 4 of the first partial ring 1 spaced 11.6 mm apart from a circumferentially opposed second circumferential end 28 of the second partial ring 2 and the second circumferential end 10 of the first partial ring 1 and the same distance is spaced from the opposite first circumferential end 29 of the second partial ring 2 ,

At the same time is the pipe connector 3 axially on the seal receiver 15 secured axially, by engaging behind it in the radial direction by means of the first engagement means 14 and the axial securing means 25 ,

The diameter of the pipe connector 3 in the area of the second intervention means 20 is dimensioned in the Vorfixierzustand shown so that a second exhaust pipe axially into the sleeve 24 is insertable. In other words, the aforementioned diameter is equal to or larger than an insertion diameter 30 in the region of the axial end of the second exhaust pipe 21 ,

The pipe connector 3 can from the into the 2a to 2d Vorfixierzustand in the final, in the 3a to 3c be shown transferred state in which the two partial rings 1 . 2 diametrically, ie moved against each other along a diametrical line, so that the Vorfixiermittelrastnasen from the associated locking receptacles 11 do not oppose, but move out in the Verrastungsrichtung and the adjacent Fixiermittelrastnasen engage with the corresponding locking receptacles, as in 3b is shown. There it can be seen that the Vorfixiermittelrastnase 6 is out of engagement with the recording 11 or the locking element 12 , which is instead engaged with the Fixiermittelrastnase 5 , In the fixing state shown, the two tubes are axially secured together by means of the first and second engagement means 14 . 22 , wherein furthermore the axial securing means 25 which are arranged in a region between the engagement means are also the seal receiver 15 engage behind in the radial direction.

LIST OF REFERENCE NUMBERS

1

first part ring

2

second part ring

3

pipe connectors

4

first circumferential end

5

Fixiermittelrastnase

6

Vorfixiermittelrastnase

7

Vorfixiermittel

8th

fixer

9

elastic tongue

10

second circumferential end

11

latching receptacle

12

locking element

13

first axial end

14

first intervention means

15

seal Housing

16

first exhaust sleeve pipe

17

ring seal

18

first seal receiving axial side

19

second axial end

20

second intervention means

21

second exhaust pipe

22

trough

23

axial

24

sleeve

25

axial securing

26

second seal receiving axial side

27

pipe system

28

second circumferential end

29

first circumferential end

30

introducer

Claims (10)

Pipe Connector ( 3 ) for axially interconnecting a first exhaust sleeve pipe ( 16 ) with a second exhaust pipe ( 21 ) comprising two with fixatives ( 8th ) partial rings connectable to a closed ring ( 1 . 2 ) for encompassing a connection region of the tubes, wherein at least one of the partial rings ( 1 . 2 ) in the region of a first axial end ( 13 ) pointing radially inward first engagement means ( 14 ) for radially engaging behind a radially outer protruding seal receptacle ( 15 ) of the first exhaust sleeve pipe ( 16 ) on a first seal receiving axial side ( 18 ) and wherein at least one of the partial rings ( 1 . 2 ) at one of the first axial end ( 13 ) facing away from the second axial end ( 19 ) pointing radially inward second engagement means ( 20 ) for axially fixing the second exhaust pipe ( 21 ), characterized in that prefixing agents ( 7 ) for pre-assembly of the pipe connector ( 3 ) on the first exhaust sleeve pipe ( 16 ) are provided, with which the partial rings ( 1 . 2 ) are prefixable to a ring, wherein the ring in a resulting Vorfixierzustand has a larger diameter than in the fixing means ( 8th ) fixable state and that in a range axially between the first and second engagement means ( 14 . 20 ) Axial securing means ( 25 ) for radially engaging behind the Sleeve ( 24 ) of the first exhaust sleeve pipe ( 16 ) on one of the first seal receiving axial side ( 18 ) facing away from the second seal receiving axial side ( 26 ) are provided to the pipe connector ( 3 ) in the prefixing state axially on the sleeve ( 24 ) of the first exhaust sleeve pipe ( 16 ). Pipe connector according to claim 1, characterized in that the partial rings ( 1 . 2 ) are formed as identical, preferably formed as a plastic injection molded, semi-circular rings. Pipe connector according to one of the preceding claims, characterized in that the prefixing means ( 7 ) are formed as latching means, which in the circumferential direction to the fixing means ( 8th ) are spaced. Pipe connector according to one of the preceding claims, characterized in that the prefixing means ( 7 ) and the fixing agents ( 8th ) each have a latching nose and a common latching projection for alternative interaction with the latching lugs. Pipe connector according to one of the preceding claims, characterized in that the axial securing means ( 25 ) have less far radially inward than the fixing means ( 8th ) to elastically deform the partial rings ( 1 . 2 ) in the area of fixing agents ( 8th ). Exhaust pipe system comprising a first exhaust sleeve pipe ( 16 ) and a pipe connector ( 3 ) according to any one of the preceding claims. Exhaust pipe system according to claim 6, characterized in that the pipe connector ( 3 ) on the first exhaust sleeve pipe ( 16 ) with the aid of prefixing agents ( 7 ) is prefixed, such that the partial rings ( 1 . 2 ) the radially outwardly projecting seal receptacle ( 15 ) and on the first seal receiving axial side ( 18 ) radially inward with the first engagement means ( 14 ) and on the second seal receiving axial side ( 26 ) with the axial securing means ( 25 ). Exhaust pipe system according to claim 6, characterized in that on the first exhaust sleeve pipe ( 16 ) a second, preferably designed as a corrugated pipe exhaust pipe ( 21 ) with the help of the pipe connector ( 3 ), whereby the partial rings ( 1 . 2 ) of the pipe connector ( 3 ) via the fixing agents ( 8th ) to each other to a the gasket of the first exhaust sleeve pipe ( 16 ) enclosing ring are fixed together and wherein the pipe connector ( 3 ) with the first exhaust sleeve pipe ( 16 ) about the first intervention means ( 14 ) and with the second exhaust pipe ( 21 ) via the second intervention means ( 20 ) and wherein the seal receiver on the second seal receiving axial side ( 26 ) from the axial securing means ( 25 ) is engaged behind in the radial direction. Exhaust pipe system according to one of claims 6 to 8, characterized in that the pipe connector ( 3 ) and with this fixed exhaust pipes ( 16 . 21 ) are formed as plastic products. Method for producing an exhaust pipe system with a pipe connector ( 3 ) according to one of claims 1 to 5, characterized by the steps: introducing a second exhaust pipe ( 21 ) in a sleeve ( 24 ) of the first exhaust sleeve pipe ( 16 ) and transferring the at the first exhaust sleeve pipe ( 16 ) prefixed pipe connector ( 3 ) from a Vorfixierzustand in which the partial rings ( 1 . 2 ) of the pipe connector ( 3 ) via its prefixing agent ( 7 ) are prefixed to each other and a seal receiver ( 15 ) of the first exhaust sleeve pipe ( 16 ) outside on both axial sides of the pipe connector ( 3 ) is engaged behind in a fixing state, in which the partial rings ( 1 . 2 ) via fixative ( 8th ) are fixed to a ring whose diameter is smaller than the ring formed in Vorfixierzustand and wherein the pipe connector ( 3 ) with the first exhaust sleeve pipe ( 16 ) about the first intervention means ( 14 ) and with the second exhaust pipe ( 21 ) via the second intervention means ( 20 ) cooperates.

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