DE2423388A1 - SEAL FOR PIPING - Google Patents

Description

Hems, 8000 Munich 40,

Frelllgrathstrasse 19 Γ »Ι-» Ι k ~ ~ 13 LJ B »U. Eisenacher Strasse 17

P.O. Box 140 UI 31.-ing. M. Π. ΒβΙΊΙ Pt app. B «tzl« r

Pal.-App. Herrmann-Trentepohl DInI .Phv « P rl Il fir rl Rptylpr Telephone: 36 3011

Telephone: 51013 fc / ipi. rnyo. kuuciiu bcuici _Μ3012

⁵¹⁰¹⁴ Dipl.-Ing. W. Herrmann-Trentepohl ^ ³⁰¹³

Telegram address: Telegram address:

Bahrpatente Herne PATENTANWÄLTE Babetzpat Munich

Telex 08 229 853 Telex52153S0

Γ ~ ΐ Bank Accounts:

Bayerische Vereinsbank Munich 952 Dresdner Bank AQ Herne 7-520 499 Postal check account Dortmund 558 68-467

¹ HISW

L J

Please state Ref .: MO 4716 in the answer

Please send a letter to:

Munich

PONT-A-MOUSSON S.A.

91, avenue de la Liberation,

54 NANCY (France)

Seal for pipelines

The invention relates to a seal for use between a cylindrical insertion end of a pipe and a socket end of a second pipe or a Connection sleeve is intended, in particular a seal for plastic pipes that are used for drainage to serve.

There are known seals with an elastic sealing element which has a bushing on the outside of the insertion end is arranged, and comprises a lip intended to abut the inner wall of the socket end, the Sealing element has a radially inwardly projecting projection which rests on the end face of the insertion end should come. Such a seal is described in DT-AS 1 675 378, for example.

^GS 409849/083

In such a known seal, the bushing should be on the insertion end simply because of its elasticity clamp. This has the following disadvantages; If the insertion end has been produced by extrusion, it may have grooves, so that the tightness between the socket and the insertion end is then inadequate proves. Furthermore, the known seal does not allow different free expansion in the axial direction between the insertion end and the socket end, because the lip is strongly against the Sleeve end is printed.

The invention is based on the object of eliminating these disadvantages by means of a simple and easy-to-install seal to fix.

This object is achieved in a seal of the type mentioned by a clamping ring, which from the outside almost the entire Length of the beech covered and its outside diameter is smaller than the inner diameter of the socket end, wherein the lip extends radially outward from one end of the socket and with an end edge at the socket end is present.

Further features and advantages of the invention result from the following, non-restrictive description. Embodiments of the invention are shown in Drawings shown and are explained in more detail below. Show it:

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Fig. 1 is one half of a longitudinal section

by an according to the invention Seal disposed on an insertion end of a pipe;

FIG. 2 shows a representation corresponding to FIG. 1,

the seal being placed between the insertion end and the socket end installed state is shown;

Fig. 3 one half of a longitudinal section through

a sealing element for another embodiment of the inventive Seal j

Figs. 4, 5, 6 and 7 are half longitudinal sections showing the

show four phases of the installation of the seal according to FIG. 3 and

Fig. 8 is an analogous representation of a abge

converted embodiment of a seal according to the invention.

The seal shown in FIGS. 1 and 2 comprises a Sealing element 1 made of an elastomer and a plastic ring 2. The seal is on a cylindrical insertion end 3 of a pipe 4 arranged and intended for tightness between the insertion end and a socket end to ensure, which is located at the end of a second tube 6. The annular space between the insertion end 3 and the hoof

409849/0835

end 5 has a thickness in the order of magnitude of the socket end and the end of the insertion.

The sealing element 1 comprises a generally cylindrical Bush 7, the inner diameter of which in the relaxed state is smaller than the outer diameter of the insertion end 3 is. The socket 7 is outside with grooves 8 and on one The end is provided with an outer collar 9 and an inner bevel 10. An annular lip 11, which is integral with the Socket 7 is formed and a larger diameter forms an outer shoulder 12 and an inner shoulder 13 at the end of the bush 7 opposite the collar 9, so that the sealing element 1 has an annular groove 14 which extends approximately over the entire length of the bushing 7. The annular lip 11 has the shape of a parallelogram in cross section and extends outwards from the socket 7. Of the smaller outer diameter of the annular lip 11 is smaller than the inner diameter of the socket end 5, whereas its larger outside diameter larger than the inside diameter of the socket end 5 is.

The ring 2 is disposed in the annular groove 14, and its inner diameter is equal to the diameter of ^the:; Ring groove.

The sealing element 1 provided with the Jling 2 is below Force application pushed so far onto the insertion end 3, that an end face 15 of the insertion end is in contact with the inner shoulder 13 of the sealing element stands. This pushing on is made easier by the inner bevel 10. The socket 7 is almost over its entire length compressed between the insertion end 3 and the ring 2,

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their subsequent deformation being made possible by the grooves 8.

By shifting the assembly assembled in this way in the axial direction to the socket end 5 comes the Annular lip 11 with its entire outermost circumference to rest on a slope 16 at the end of the socket end is provided. The annular lip 11 is compressed radially, deforms and penetrates into the socket end 5 a (Fig. 2). The fact that the inner shoulder 13 is supported on the end face 15 of the insertion end is ensures that there is no displacement of the sealing element relative to the insertion end during this process can, which also does not affect the strength with which the socket 7 is clamped on the insertion end. As is known in the case of lip sealing elements, the pressure of the pumped fluid also presses during operation the ring lip 11 against the socket end.

3 to 7 show a particularly advantageous seal according to the invention.

The illustrated in Fig. 3 sealing element 17 of this seal also includes a cylindrical bush 18, wherein however, the inner shoulder 13 of the sealing element 1 through an end flange 19 is replaced which protrudes inward. The opposite end of the socket 18 is of two strong lips 20 and 21 separated by an annular recess 22. The lips 20 and 21, which protrude outwards, have a triangular cross-section. One lip 20 is inclined towards the socket 18, while the other lip 21

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is inclined in the opposite sense. The inside diameter of the sealing element 17 is smaller than the outside diameter of the insertion end 3, and the largest diameter of the Lips 20 and 21 are larger than the inside diameter of the socket end.

A ring 23 made of plastic, which has an inner flange 24 at one end, fits snugly on the socket 18 and covers the end flange 19 of the socket and almost hers entire length (Fig. 4). Another ring 25, which is also made of plastic, has an outer shoulder on one end face 27 26 and has the same outside diameter as the socket end 5, covers the lips 20 and 21, whereby it compresses them in the radial direction, and covers exactly the end of the opposite to the inner flange 24 Ring 23. The inner diameter of the ring 25 is smaller than that of the socket end.

When installing this seal, the insertion end is inserted in the manner described above until the end face of the Push-in comes into contact with the end flange 19 of the sealing element 17. Then the end of the socket end 5, the shape of which is complementary to the end face 27 of the ring 25, pushed against this end face 27 (Fig. 6). When the push-in end 3 is pushed further into the socket end, the latter pushes the ring 25 back, slides over the lip 20, because of the relative dimensions of the sleeve end and the ring 25 not the There is a risk that the lip 20 is folded over and then slides over the lip 21. The lips 20 and 21 are in

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Compressed in radial direction and ensure both at Positive pressure as well as negative pressure inside for tightness, with internal negative pressure in the field of sewage drainage occurs frequently.

The rings 2 and 23 have an outer diameter that is smaller than the inner diameter of the socket end, so that when the seal is installed, an annulus exists between the ring 2 or 23 and the socket end. If there is a different! Thermal When the two connected pipes expand, their relative displacement is made easier, since only the lip or the lips slide or slide over the socket end. The free end of the ring 25 has an inner collar 28 on, which has a slightly larger diameter than the insertion end and as protection against dust particles or the like. serves that could try to penetrate the seal.

Finally, the variant according to FIG. 8 differs, those shown during the installation are different from the previous ones Embodiments in that the ring 25 is provided with a sleeve 29 which is intended to the end of the To cover the socket end 5, with a shoulder 30 on the socket end 5 rests on the ring 25, the end face of which is not need to have special training.

The pipes under consideration are usually inclined or even SBB law. In this case, the ring 25 is from even at the end of the socket end. For the less likely event that the pipes are arranged horizontally are or even have a less favorable tendency, one can

409849 / 0-8

Connection, for example a pawl device, can be provided between the ring 25 and the socket end 5.

It is obvious that as a modification it is possible the seal according to FIGS. 1 and 2 with the second wire To provide lip which has the function of the lip 21 of the seal according to FIGS. 3 to 7, or this second To omit lip in the latter seal, as well as the inner flange 24 of the ring 23. Furthermore, can the ring 2 and the rings 23 and / or 25 are made of metal, these rings also made of any other suitable material.

Patent claims:

409849/0835

Claims (8)

-9- Claims Gasket for use between a cylindrical insertion end of a pipe and a socket end of a second pipe or a connecting sleeve is intended, with an elastic sealing element, which is a sleeve, which is arranged on the outside of the insertion end and comprises a lip which is attached to the inside wall of the socket end should be applied, wherein the sealing element has a radially inwardly protruding projection that for the plant can come at the end face of the insertion end, characterized by a clamping ring (2, 23), which from the outside covers almost the entire length of the bushing (7, 18) and its outer diameter is smaller than the inner diameter of the socket end (5), the lip (Ht 20, 21) extending radially outward from one end of the socket and one end edge rests against the socket end. 2. Seal according to claim 1, characterized in that the lip (11, 20) is inclined towards the interior of the socket end (5) is. 3. Seal according to claim 2, characterized in that the sealing element (17) carries a second lip (21) which is inclined towards the outside of the socket end (5) and rests on the socket end with one end edge. 4. Seal according to one of Claims 1 to 3, characterized in that that the radially inwardly protruding projection is an inner shoulder (13) which is located at the boundary between the socket (7) and the lip (11) is arranged. 409849/0835 5. Seal according to one of claims 1 to 3, characterized in that the radially inwardly projecting Projection is a flange (19) which the bushing (18) has at one of its ends. 6. Seal according to claim 5, characterized in that the ring (23) has an inner flange (24) at one end which rests on the flange (19) of the socket (18). 7. Seal according to one of claims 1 to 6, characterized in that that the ring (2) is arranged in an annular groove (14) of the bushing (7), which is between the lip (11) and an outwardly protruding collar (9) is formed at one end of the socket (7). 8. Seal according to one of claims 1 to 7, characterized by a second ring (25), the inner diameter of which equal to the outside diameter of the first ring (23) and which is intended to radially compress the lip or lips (20, 21) before installing the seal, to facilitate installation. 409849/0835