DE7519992U - Connection or connecting piece with a length compensation device, in particular for water meters - Google Patents

Description

L 758Oa

Lutz & Giiaplo GmbH

7000 Stuttgart 1, Adlerstr. 16

Connection or connecting piece with a length compensation device, especially for water meters

The innovation relates to a connection bzr *. Connector with a Langenausgleichsei Tirichtung, especially for water meters, which can be fixedly attached to a connection bracket and has a threadless pipe section in the direction of the water meter, on which one to the max Compensating length extended union nut is arranged, each one arranged on the pipe section and one, the to be connected device engages over associated sealing ring.

Such a connection piece is known in which the seal arranged on the elongated pipe section consists of a consists of an elastic plastic ring in the form of a cutting ring, v. for the union nut in its receiving recess one

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Has run-up slope. This type of sealing or clamping has the significant deficiency described below.

If the union nut is so far from the jjängenausgleichs Piece of pipe pulled off that only the one intended to be clamped Part of the seal between the pipe section and the union nut - here run-on bevel - comes to rest, then becomes - as it has been shown in practice - when tightening the union nut due to the axial forces that occur, the seal is pressed apart even in the area without internal delimitation, creating instability in the seal and / or lateral guidance arises, so a \ I tilting is possible.

It is the task of the innovation to eliminate the deficiency described.

To solve this problem posed is a connection or. Connector of the type mentioned according to the Innovation proposed that between the arranged on the pipe section first sealing ring and the second sealing ring non-deformable, hollow-cylindrical intermediate ring is arranged.

The non-deformability of the intermediate ring should be understood to mean that the material used for the when tightening the union nut, the expected maximum axial force does not allow a noticeable deformation. Even hard plastics can be used for this. Since the intermediate ring now retains its shape, the union nut becomes once through its union collar and the other through the intermediate ring, i.e. with two supports on the pipe

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piece safely guided, and the first soft seal by pressing together on the outer surface of the pipe section at the same time pressed tightly. The second seal, intended for the device to be connected, is also on the intermediate ring a fixed counter-bearing and can therefore seal securely.

According to a preferred exemplary embodiment, the first sealing ring is an O-ring and the union nut is tzt-eiae This O-ring receiving recess with stop for the intermediate ring.

The innovation will now be explained in more detail with reference to the drawing showing an exemplary embodiment. The only figure, shown partially in section, shows a connector with a length compensation device. That Connection piece consists of an externally threaded part 1, onto which two nuts 2 and 3 are screwed, with which the connector is attached to an arm 4- of a connector bracket, not shown, a smaller one Having a diameter, also provided with an external thread rope 5 for connecting a pipeline, and a Pipe section 6. The pipe section 6 is at least as long as an elongated union nut 7 slidingly arranged on it (lower half of the drawing). The union nut 7 takes a first sealing ring 8, one made of hard plastic hollow cylindrical intermediate ring 9 and a second sealing ring 10. The first sealing ring 8 is made of a soft one Material of existing O-ring, which is in an unspecified Recess, which causes its deformation when

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Compression is limited. The second sealing ring 10 "consists Made of a material that is a little harder than that of the O-ring.

In the upper half of the drawing, the connection of a device 11 shown in dashed lines, e.g. a water meter, is shown in the furthest possible position.

When screwing the union nut 7 onto the external thread _de_s_ (jer_ätes ^ L, ^ wi -sieh- am device 11 supporting second First press the O-Bing (8) apart over the stiff intermediate ring 9, i.e. between the union nut and pipe section 6 establish a seal until the intermediate ring 9 rests against the edge of the recess for the O-ring, then evenly pressed tightly in accordance with the axial force generated when the union nut 7 is rotated. One after the other Successful, perfect sealing is guaranteed. In addition, there is good guidance through the collar and the intermediate ring 9 »on the pipe section 6, always given.

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Claims (2)

S u t ty claims 1. Connection or Connection piece with a length compensation device, in particular for water meters, which can be fixedly attached to a connection bracket and has a threadless pipe section in the direction of the water meter ₅ on which a union nut is arranged which is extended by the maximum compensation length to be expected, one on the pipe section and one , overlaps the Mchtring assigned to the device to be connected, characterized in that a non-deformable, hollow-cylindrical intermediate ring (9) is arranged between the first sealing ring (8) arranged on the pipe section (6) and the second die ring (10). 2. Connection and connecting piece according to claim 1, characterized in that the first sealing ring (8) is a O-ring or profile ring and the union nut (7) is a recess with a stop which accommodates this O-ring or profile ring for the intermediate ring (9). 7519992 23.10.75