DE102004032955A1 - Pipe connection has sealing ring inserted in annular groove applied to one pipeline end; first pipeline has reduced external diameter section near first end, second pipeline has securing element for axially fixing pipelines together - Google Patents

Abstract

The connection has two pipelines (3,4) to be connected together, each with an end (1,2), whereby the first end (1) has an external diameter matching the internal diameter of the second pipeline end (2) and a sealing ring (6) inserted in an annular groove applied to the first or second pipeline end. The first pipeline has a reduced external diameter section (7) near the first end and the second pipeline has a securing element (9) for axially fixing the pipelines together.

Description

The The invention relates to a pipe joint according to the preamble of the claim 1.

such Pipe joints are known in a variety of embodiments such that it in this regard No special proof required. Especially For example, existing copper pipes are known in where the one pipe end is widened so that Connection with another pipe section of the same diameter the other plugged fit into the flared end and there soldered can be. These compounds are used, for example, in heating circuits, since they are unproblematic in themselves.

There by soldering a cohesive bond created between the two pipes, cause temperature fluctuations to thermal expansions, in turn, since the pipes regularly, for example, at a Wall are fixed, mechanical stresses in the overall piping system have as a consequence.

Especially in pipelines of boilers, which inevitably have larger temperature fluctuations are exposed, such thermal expansion and the so are connected mechanical stresses, in the worst case even to destruction the solder joint to lead could can not be avoided. Encountered regularly one this problem by the fact that the connection areas accordingly large dimensions and, accordingly, withstand maximum possible loads can. When properly processed, the according to professional soldering skills presupposes, is such a soldered Pipe connection despite the effort mentioned currently the common solution.

Furthermore It may also be due to inaccurate manufacturing or positioning, for example, a heater come to mechanical stresses.

Of the Invention is based on the object, a pipe connection of the above referred to type possibly occurring mechanical stresses due to thermal expansion or tolerance compensation requirements to be improved, that these compensate better in particular an axial change in length better can.

These Task is with a pipe connection of the type mentioned solved by the features listed in the characterizing part of claim 1.

To The invention is thus intended that for sealing between the two pipe ends in one of either the first or second Pipe end introduced, circumferential groove arranged sealing ring is arranged, that the first pipe a the first pipe end neighboring and relative has reduced pipe section of its outer diameter, and that for axial fixation of the pipes to each other on the second Pipe end in the region of said pipe section of the first Pipe provided a preferably annular securing element is.

These Construction guaranteed first, by the sealing ring a tight connection between the both pipes and allows second, a relative movement of the two pipe ends to each other, if the mentioned thermal expansion occur or compensate for manufacturing or assembly tolerances should be required.

Of the Advantage of the invention is therefore that without a thermal joining methods (Soldering) one Dense connection between two pipes is created, the about that In addition, it is also capable of elongation effects in particular due to thermal expansion compensate. Ensures said fuse element thereby that the smaller diameter pipe end does not come from the larger diameter can slip out.

Other advantageous developments emerge from the dependent claims.

The pipe connection according to the invention including their advantageous developments according to the dependent claims below with reference to the drawings of two preferred embodiments explained in more detail.

It shows

1 in perspective, two interconnected pipelines;

2 in side view the pipe connection according to the invention 1 ;

3 in section the pipe connection according to the invention according to 2 ;

4 in side view one of the two tubes cables;

5 in section the pipe connection according to the invention with a snap ring as a securing element;

6 in front view the snap ring according to 5 ;

7 on average, the snap ring according to 6 ;

8th in section the pipe connection according to the invention with an annular disc as a securing element;

9 in front view the ring disk according to 8th ;

10 in section, the annular disc according to 9 ; and

11 in section a preferred embodiment of the pipe joint according to the invention with a seal at the second pipe end.

The particular in the 5 and 8th easily recognizable, pipe connection according to the invention comprises two pipes to be connected together 3 . 4 (see for example 1 ) each with at least one pipe end 1 . 2 , In this case, the first pipe end 1 - Just like with a usual, to be soldered connection - a precisely to the In nendurchmesser of the second pipe end 2 trained outside diameter.

Essential for the pipe joint according to the invention is now that, first, for sealing between the two pipe ends 1 . 2 one in either the first (see 1 to 10 ) or second (see 11 ) Pipe end 1 . 2 introduced, circumferential groove 5 arranged sealing ring 6 provided is that, secondly, the first pipeline 3 a the first pipe end 1 adjacent and with respect to its outer diameter reduced pipe section 7 third, and third, to axially fix the piping 3 . 4 to each other at the second pipe end 2 in the area of the pipe section 7 the first pipeline 3 an annular securing element 9 is provided. Preferably, the securing element 9 in an inside at the second pipe end 2 circumferential groove 8th arranged. Alternatively, for example, one comes to the second pipe end 2 screwed socket into consideration (not shown). It is essential that the possibility of movement of the first pipe end 1 is limited in the axial direction.

To the effect of the fuse element 9 to optimize, is advantageously provided in the illustrated, preferred embodiment, that between the first pipe end 1 and the pipe section 7 a sudden tube cross section change 10 is trained. So it should be an axial displacement between the two pipe ends 1 and 2 come, the interaction of fuse element 9 and pipe section change 10 Ensure that the piping 3 and 4 can not solve each other.

Alternatively, the transition from pipe section 7 to the pipe end 1 but also more or less continuous.

According to another advantageous development, it is provided that the first pipe end 1 in the area of the sealing ring 6 a cylindrical section 11 (which, as shown, from the groove 5 may be interrupted) and axially displaceable in the likewise cylindrically formed pipe end 2 is arranged. This design ensures an optimally guided relative movement of the two pipe ends 1 and 2 to each other.

Supplementary to the movement limitation in the direction of securing element 9 is advantageously provided for the other axial direction according to a further embodiment of the pipe connection according to the invention that the pipe end 2 towards the pipeline 4 a diameter taper 12 this optionally shoulder-shaped (not shown) or continuously (see in particular 3 . 5 and 8th ) is trained.

Regarding the fuse element 9 In particular, two embodiments are preferred in addition to various other possibilities:
After a first execution is according to 6 and 7 Advantageously provided that the securing element 9 as an open circlip 13 is formed, this preferably a circular and the groove 8th has a semicircular cross-section. How out 5 can be seen, allows the material-free section on the snap ring 13 in that this by appropriate compression in the groove 8th can be used. Positioned, the snap ring is located 13 about halfway in the groove 8th ; the other half protrudes from this and limits as a stop for the tube cross section change 10 the movement of the pipe end 1 , This solution is particularly suitable if the pipeline 3 after the pipe section 7 expands again, ie a closed ring is not pushed on.

After another, in 9 and 10 illustrated embodiment, it is provided that the securing element 9 as closed, mindes at least groove-toothed ring disk 14 is trained. The toothed shape leads to an optimized elasticity of the annular disc 14 their insertion into the groove 8th facilitated. Preferably, as shown, both the annular disc 14 as well as the groove 8th at least partially a rectangular cross section. So that the ring disk 14 mountable, this embodiment requires that the pipeline 3 the same (or smaller) diameter as the pipe section 7 having.

In particular, to ensure that the fuse element 9 is not lost, is advantageously provided for both embodiments that the fuse element 9 with preload in the groove 8th is arranged.

To ensure the tightness of the pipe connection is in accordance with 5 and 8th Advantageously provided that the sealing ring 6 is designed as an O-ring. O-rings are known to be flexible or elastic over a long period of time, ie they are particularly well suited for frequent heat-expansion effects.

As shown, another production technology favorable and accordingly preferred embodiment is that the first, inner pipe end 1 as copper pipe and the second, outer pipe end 2 as brass ( 5 and 8th ) or as a plastic sleeve ( 11 ) is trained. But also the first, inner pipe end 1 or the pipeline 3 can be made entirely of plastic.

Furthermore, to facilitate Einbringbarkeit the fuse element 9 in the groove 8th advantageously provided that the second, outer pipe end 2 at its open cross section, a phasing 15 having.

Finally, as in 11 shown, to avoid shearing the O-ring 6 Advantageously provided that each pipe end 1 . 2 a diameter graduated area 16 . 17 has, wherein the area 16 . 17 formed adapted to each other and wherein the area 16 of the first pipe end 1 to the end of the pipe 3 Towards the area and rejuvenates 17 of the second pipe end 2 to the end of the pipeline 4 extended.

1

Pipeline end

2

Pipeline end

3

pipeline

4

pipeline

5

groove

6

seal

7

pipe section

8th

groove

9

fuse element

10

Pipe cross-section changes

11

cylindrical section

12

Diameter reduction

13

snap ring

14

washer

15

chamfer

16

Area

17

Area

Claims (15)

Pipe connection comprising two pipes to be connected ( 3 . 4 ) each having at least one pipe end ( 1 . 2 ), the first pipe end ( 1 ) a precisely to the inner diameter of the second pipe end ( 2 ) formed outer diameter, characterized in that for sealing between the two pipe ends ( 1 . 2 ) in either one of the first and second pipe ends ( 1 . 2 ) introduced, circumferential groove ( 5 ) arranged sealing ring ( 6 ) is provided that the first pipeline ( 3 ) one the first pipe end ( 1 ) adjacent and reduced in terms of its outer diameter pipe section ( 7 ), and that for the axial fixation of the pipelines ( 3 . 4 ) to each other at the second pipe end ( 2 ) in the region of the pipe section ( 7 ) of the first pipeline ( 3 ) a fuse element ( 9 ) is provided. Pipe connection according to claim 1, characterized in that the securing element ( 9 ) annular and in an inside at the second pipe end ( 2 ) circumferential groove ( 8th ) is arranged. Pipe connection according to claim 1 or 2, characterized in that between the first pipe end ( 1 ) and the pipe section ( 7 ) an abrupt pipe cross-section change ( 10 ) is provided. Pipe connection according to one of claims 1 to 3, characterized in that the first pipe end ( 1 ) in the region of the sealing ring ( 6 ) a cylindrical section ( 11 ) and axially displaceable in likewise cylindrically formed pipe end ( 2 ) is arranged. Pipe connection according to one of claims 1 to 4, characterized in that the pipe end ( 2 ) in the direction of the pipeline ( 4 ) for limiting the movement of the other pipe end ( 1 ) a diameter taper ( 12 ) having. Pipe connection according to claim 5, characterized in that the diameter taper ( 12 ) is optionally formed shoulder-shaped or continuous. Pipe connection according to one of claims 1 to 6, characterized in that the securing element ( 9 ) as an open snap ring ( 13 ) is trained. Pipe connection according to claim 7, characterized in that the snap ring ( 13 ) a circular and the groove ( 8th ) has a semicircular cross-section. Pipe connection according to one of claims 1 to 8, characterized in that the securing element ( 9 ) as a closed, at least groove-toothed annular disc ( 14 ) is trained. Pipe connection according to claim 9, characterized in that both the annular disc ( 14 ) as well as the groove ( 8th ) at least partially have a rectangular cross-section. Pipe connection according to one of claims 1 to 10, characterized in that the securing element ( 9 ) with preload in the groove ( 8th ) is arranged. Pipe connection according to one of claims 1 to 11, characterized in that the sealing ring ( 6 ) is designed as an O-ring. Pipe connection according to one of claims 1 to 12, characterized in that the first, inner pipe end ( 1 ) as copper or plastic pipe and the second, outer pipe end ( 2 ) is designed as a brass or plastic sleeve. Pipe connection according to one of claims 1 to 13, characterized in that the second, outer pipe end ( 2 ) at its open cross-section to facilitate the insertion of the securing element ( 9 ) a phasing ( 15 ) having. Pipe connection according to one of claims 1 to 14, characterized in that each pipe end ( 1 . 2 ) a diameter graduated area ( 16 . 17 ), the area ( 16 . 17 ) are adapted to each other and wherein the area ( 16 ) of the first pipe end ( 1 ) to the end of the pipeline ( 3 ) and the area ( 17 ) of the second pipe end ( 2 ) to the end of the pipeline ( 4 ) extended.