DE1910831A1 - Tensile pipe connection with shrink ring - Google Patents

Description

Wavin N.V., Zwolle, Händellaan -251 (Netherlands)

"Tensile pipe connection with shrink ring"

The invention relates to a tensile strength pipe connection, which consists of a socket end, one on the outer side Insertion end provided with a recess in the region of the recess for fastening means for tensile strength Connection of the socket end and the spigot end, as well as sealing means.

There are already tensile pipe connections of the above type known, which have grooves in the socket end and in the spigot end, with plastic rods in the grooves formed

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material is located that ensures a good tensile strength connection between the socket end and the spigot end.

Such a pipe connection is burdened with the defect, that the inner side of the socket end is always processed. must, before the required, the plastic rod material receiving Grooves are provided.

It is an object of the invention to provide a pipe joint of the type mentioned above which has these shortcomings is not contaminated, can be easily installed by untrained personnel and only has a minimum of processing on the Pipe requires.

Such a pipe connection is characterized according to the invention characterized in that the fastening means consist of a shrink ring located in the region of the recess on the outer side exist, the arrangement being such that the wall of the socket end is pressed into the recess.

It can be seen that such a pipe connection in a very simple manner by inserting the with a recess provided plug-in end can be obtained in a widened socket end, whereupon in the area of the recess a

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stretched ring made of thermoplastic material is arranged. By heating the ring and the wall of the expanded socket end up to the temperature at which · the expansion and expansion occurs, they shrink, with part of the flared end of the socket end being pressed into the recess will. The shrink ring is then the required clamping Ensure between the skid end and the spigot end.

The ring of thermoplastic material is initially of a smaller diameter than the outer diameter of the socket end before the \ expansion.

The invention is illustrated by means of an exemplary embodiment Drawing explained in more detail.

It show ■

1 shows a section through the pipe connection according to the invention, before the fasteners are warm,

Fig. 2 shows a completed pipe connection according to the invention.

The tensile strength pipe connection shown in Figure 1 consists of a sleeve 3 as a sleeve end into which two spigot ends 1 and 2 are inserted. The spigot ends 1 and 2 are glued on Parts 4 and 5 provided. As desired, you can

-H-

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processing rings 6 between the glued-on parts 4 and 5 and the outer wall of the pipe ends 1 and 2 are located.

The glued parts 4 and 5 are provided with grooves 8, while sealing means in the form of sealing rings 7 are also provided. In the embodiment there are two Sealing rings 7 are shown for each pipe end, but it can be seen that a set of sealing rings 7 would also suffice.

There are fasteners on the outer side of the socket end 3 in the form of an expanded ring 9 made of thermoplastic material, which has a diameter before expanding smaller than the outer diameter of the spigot end 1 or 2 with glued parts 4 and 5. After expanding, this ring is brought to a higher temperature than the temperature at which the expansion took place, whereby the ring shrinks and part of the socket end 3 into the recess 8 is pressed. This sleeve end 3 is expediently also made of an expanded pipe part, the Expanding occurred at a temperature lower than the temperature at which the ring is allowed to shrink.

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The above-mentioned parts are made of 'thermoplastic material such as polyvinyl chloride.

Claims

909841/0943

Claims (3)

Patent claims: / l. \ Tensile pipe connection consisting of a socket end, an insertion end provided with a recess on the outer side, fastening means provided in the area of the recess for the tensile connection of the socket end and the insertion end, as well as sealing means, characterized in that the fastening means consist of a shrink ring (9) located in the area of the recess on the outer side, the arrangement being such that the wall of the socket end (3) has been pressed into the recess (8). 2. A tensile strength pipe connection according to claim 1, characterized in that the recess (8) is provided in a part (4, 5) firmly connected to the pipe end (1, 2), for example glued on. 3. Tensile pipe connection according to claim 1 and 2, characterized in that a sealing ring (6) is provided between the pipe end (1, 2) and the glued-on part C ^{1 +, 5). 1} K. Tensile pipe connection according to Claims 1 to 3, characterized in that sealing means (7) lie on both sides of the recess (8). 909 841/0943 BATH ORIGINAL