DE202018002248U1 - Plastic piping with a support sleeve - Google Patents

Abstract

Plastic pipe (2), comprising at least one pipe end (1, 1A) and at least one support sleeve (6), which is inserted into the at least one pipe end (1), characterized in that the plastic pipe (2) with inserted support sleeve (6) its support sleeve (6) associated end (1A) has a radially inwardly facing collar (8) which is dimensioned such that its inner diameter (8A) is smaller than the outer diameter (6A) of the support sleeve (6) and larger or the same as the inner diameter (6A) of the support sleeve (6).

Description

The invention relates to a plastic pipe, comprising at least one pipe end and at least one support sleeve which is inserted into the at least one pipe end.

Plastic pipelines are often an inexpensive and easy alternative to metallic pipes. In particular, blow-molded pipes are of increasing importance, for example for use as charge air pipes in motor vehicles.

Since such pipes are inherently rigid, it is often necessary to connect flexible elements, for example rubber hoses, to the ends of the pipes. A particularly simple and reliable connection of pipes with hoses is to clamp the hoses with so-called tension or crimp rings on the pipe ends. The clamping takes place by means of a compression of the clamping ring from the outside to the pushed onto a pipe end hose end piece by reducing the clamping ring diameter.

In order to ensure sufficient tightness of this connection, a certain minimum clamping force must be present. In the case of plastic pipes, in particular blow-molded plastic pipes, there is the risk that the plastic pipe end will be deformed unduly, so that no tightness can be achieved. Therefore support sleeves are often used in the field of bracing, which are inserted into the pipe end.

The EP 1 271 036 A1 shows a pipe press connection of the kind described. In the 3 the cited document is shown a support sleeve for support, which should be used when using plastic pipes. The axial position of the support sleeve is not defined, however, so that it can lead to errors during assembly.

The DE 103 31 381 A1 also discloses such a press connection. For a trouble-free installation of the support sleeve, this has a collar which abuts when inserting the support sleeve to the end face of the pipe end and should ensure after pressing for a secure defined axial position of the support sleeve.

However, both solutions have in common that the support sleeve receives a firm position only when pressing the connection.

Since plastic pipes absorb moisture when stored in an environment of high humidity and temperature and thereby increases the inner diameter of the plastic pipes, there is a risk that the support sleeves fall out of the pipe ends. Remedy could create a certain bias, pawls or a certain corrugation of the support sleeves here. However, these elements could make negative in the bracing by appropriate pressing into the pipe inner surface.

The invention therefore an object of the invention to improve a plastic pipe of the type described so that the support sleeve does not fall even with a smooth surface and without bias from the pipe end even when storing the plastic pipe at high humidity and temperature.

This object is achieved in that the plastic pipe with its support sleeve at the end of its associated sleeve has a radially inwardly facing collar which is dimensioned such that its inner diameter is smaller than the outer diameter of the support sleeve and is greater than or equal to like the inner diameter of the support sleeve.

Such a collar ensures even with the usually occurring diameter enlargements of plastic piping for a secure fate of the support sleeve in the associated pipe end. The outer wall of the support sleeve can remain completely smooth-walled.

Such a collar is for example very easily generated by a heated forming die, pressed by the pressed onto the end of the pipe, the pipe end and according to the predetermined shape of the punch the now plastified pipe end is deformable. As a result, a very inexpensive, simple pipe section can be used as a support sleeve.

With reference to the drawing, an example of the invention will be explained in more detail below. The 1 shows a section 1 a plastic pipeline 2 with a first end 1A in a longitudinal section. The section 1 indicates on its outside 3 a covenant 4 on. At its first end 1A points the section 1 a start-up bond 5 on, which should facilitate the attachment of a hose, not shown here. Between the bunch 4 and the run-up collar 5, the hose line by means of a clamping ring, also not shown on the section 1 braced.

Inside is in the section 1 a support sleeve 6 with an outer diameter 6A plugged in, which up to a stop 7 into the pipeline 2 is insertable. A radially inward-pointing waistband 8th is at the end 1A arranged such that the inner diameter 8A of the Federal 8th smaller than the outside diameter 6A the support sleeve 6. The Federation 8th so ensures that the support sleeve 6 not from the section 1 the pipeline 2 can fall out, with the flow through the pipeline 2 is not affected.

LIST OF REFERENCE NUMBERS

1

Section of the plastic pipe 2

1A

First end of section 1

2

Plastic piping

3

Outside of section 1

4

Fret on section 1

5

Anchor of the section 1

6

support sleeve

6A

Outer diameter of the support sleeve 6

7

Stop in section 1

8th

radially inward-pointing collar of section 1

8A

Inner diameter of the Federal 8

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• EP 1271036 A1 [0005]
• DE 10331381 A1 [0006]

Claims (1)

Plastic pipe (2), comprising at least one pipe end (1, 1A) and at least one support sleeve (6), which is inserted into the at least one pipe end (1), characterized in that the plastic pipe (2) with inserted support sleeve (6) its support sleeve (6) associated end (1A) has a radially inwardly facing collar (8) which is dimensioned such that its inner diameter (8A) is smaller than the outer diameter (6A) of the support sleeve (6) and larger or the same as the inner diameter (6A) of the support sleeve (6).

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