DE6811581U - PIPE COUPLING WITH CORD - Google Patents

Description

WavinN.V., ZV / OLLE, Oude Veerweg 1 (NETHERLANDS)

"Pipe coupling with cord"

The innovation relates to a tensile? * Coupling of a first tube end, preferably designed as a socket end, and a second, preferably designed as a plug-in end Pipe end with sealing means and coupling means, which work together with the first and second pipe ends.

In these known Zugfosten couplings is for the purpose of Arrangement of the coupling means in the inner viand of the socket end and one groove each in the outer wall of the spigot end provided, into which a flexible plastic rod is inserted through an opening from the outside. The & he puts plastic rod

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into the two grooves and ensures a tensile strength Connection. Such a coupling has the disadvantage that a groove has to be milled in both pipe ends, whatever brings a weakening of the pipe wall with it.

There are still tensile couplings known that are based on the have coupling means provided on the outer side, but their construction is quite intricate.

The innovation is based on the task of a tensile strength To create coupling, which absorb very large pressure surges can, which is not possible with the previously known couplings, and continue to absorb small angular displacements can, while a quick and easy assembly is also possible is.

According to the innovation, such a coupling is characterized by that the socket end and the male end on the outer side distributed on the circumference, cam-shaped parts have, while a cord made of thermoplastic material is provided, which alternates around a cam surface on the first pipe end and a cam surface on the second The pipe end runs and the ends of the pipe are tensile with one another are connected.

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Such a cord is preferably made of polypropylene.

The innovation also relates to a piece of pipe that is connected to the end with spaced apart cam-shaped parts, the cam surfaces of which have a cavity, is provided.

The innovation is explained below with reference to an exemplary embodiment Illustrative drawing explained in more detail. Show it:

Fig. 1 in a sketchy and perspective representation a new, high-tensile coupling,

Pig. 2 such a coupling in section according to the
Line II-II, and

Pig. 3 a pipe coupling with an additional seal.

In Pig. 1 and 2 is a coupling consisting of a socket end 1 and a spigot end 2 shown. The sleeve end 1 is provided on the inner side with a groove 3 in which sealing means 4 are, for example in Porm a
two protruding lips having ring are formed. On the socket end 1 there are cam-shaped parts 5, while the entering pipe end has cam-shaped parts 6.

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These no uniform parts 5 are on a part 7 with provided such an inner diameter that this part can receive the male end 2 on which the cams are provided.

The end 8 of the insertion end 2 does not lie against the end edge 9 in the socket end 1.

Between the oppositely arranged cams 5 and 6 slots 1o can be formed with a polypropylene cord 11 are filled in, the cord 11 once around the inwardly rounded end 12 of the cam and is then guided around the inwardly rounded end 13 of the cam 6. It is clear that the cams too can be formed in such a way that no continuous Slits arise.

The cord 11 has a loop H through one of the Er.de. which is pulled through the free end 15 of the cord, which is possibly knotted.

It is clear that this pipe connection can easily be made by untrained personnel while through the elastic properties of the cord suddenly great Pressure bumps can be absorbed. In this context

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It should be noted that "in the event of tensile stresses, the loop 14 of the cord is drawn between two cams 6 is and thereby clamped the free end 15, there the distance between the cams 6 prevents the sling 14 from slipping through.

In addition, because of the easily deformable cord material, the pipe connection can easily incur small angular displacements take up.

In Pig. 3 is the same pipe connection as in Pig. 2 shown so that corresponding parts in corresponding Way are designated. However, since the socket end 1 usually has a glued-on part 16, along the glued connection 17 leaks occur. In order to avoid this, an in a groove arranged sealing ring 18 is provided. A similar sealing ring 19 can be located between the glue joint 2o of the pipe end 1 and the part 21 are located.

Protection claims:

Claims (7)

t I claims for protection; 1. Tensile coupling of a first pipe end, preferably designed as a socket part, with a second pipe end, preferably designed as a plug-in end, with sealing means and coupling means which work together with the first and second pipe ends, characterized in that the first pipe end (1) and the second pipe end ( 2) have cam-shaped parts (5, 6) distributed on the outer side on the circumference, while a cord (11) made of thermoplastic material is arranged, which runs alternately around a cam surface on the first pipe end and a cam surface on the second pipe end and whose. Ends are connected to each other with tensile strength » 2. Tensile coupling according to claim 1, characterized in that the thermoplastic material of the cord consists of polypropylene. 3 · Tensile coupling according to claims 1 and 2, characterized in that the thermoplastic material consists of a reinforced plastic. - ν - % J I. _ 7 - 4. Tensile coupling according to claims 1 to 3 » characterized in that the cam surfaces (13, 14) have an inwardly directed cavity for receiving the cord (11). 5. Tensile coupling according to claims 1 to 4? characterized in that the cams are spaced from one another in such a way that a loop (14) provided at the end of the cord (11), after the other end (15) of the cord has been pulled through, does not pull through between the cams under tensile stress v / can earth. 6. Tensile coupling according to claims 1 to 5 » characterized in that the two ends of the cord are welded together. 7. Pipe section, which at its end with spaced apart cam-shaped parts (5> 6), the Nockenfl'ohen (13, 14) have a cavity, provided is.