DE7115019U - Screw connection with two union nuts, especially for tubular T-pieces and / or elbows - Google Patents

Description

April 20, 1971

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Telephone 56) 767

GEORG FISCHER AKTIENGESELLSCHAFT, CH-8200 Schaffhausen

'..wan. Gotthardstrasse SI "^

Threaded connection for two tubular parts, in particular tubular T-pieces and / or elbows

The present innovation relates to a threaded connection for two tubular parts, in particular for tubular parts T-pieces and / or elbows, with two union nuts that can be screwed onto the tubular parts and one tubular Connector.

For example, threaded connections for connecting tubular T-pieces and / or elbows are known, where lock nuts and clamping rings are used, whereby a tube is arranged between the two ends of the screw connections, for which before the insertion - mostly at the assembly site - the preparation is still time-consuming; s work for cutting to length, deburring and oiling required are.

There are also pipe fittings with two union nuts become known, which can be screwed onto pipes to be connected to one another. These pipe fittings

are on the one hand relatively expensive and on the other hand have the Νϋ.υΐιυό! ϊ1 that the seals at the »connection points are afflicted with deficiencies.

The present innovation is based on the object of a threaded connection for two tubular parts, in particular to create tubular T-pieces and / or elbows with which the disadvantages inherent in the known threaded connections of the type described above are avoided.

According to the innovation, the object is achieved in that the tubular connecting piece has two annular grooves provided with a shoulder, in which snap rings are arranged are to rest in the assembled state of the pipe screw connection on each wall of one in the bore of the union nuts arranged annular groove, and that at each end of the tubular connecting piece at least one annular Sealing edge is arranged, v / calibrate each to rest on an end surface extending at right angles to the pipe axis the tubular parts are intended to create a seal between the screw connection and the connector to effect.

The drawing shows an embodiment of the subject of innovation in a simplified representation, and though:

1 shows a longitudinal section through the threaded connection with two tubular parts, and

Fig. 2 shows an example of the threaded connection, at which »η with the help of the same connections between T-pieces and elbows have been manufactured,

According to FIG. 1, the screw connection has two union cutters 1, which can be screwed onto two tubular parts 2 and 3 to be connected to one another. In the bores * l of the two union nuts 1, a tubular connecting piece 5 is arranged, which has two annular grooves 7 provided with a shoulder 6 on its outer circumference, in which snap rings 8 are arranged, which in the assembled state of the pipe screw connection on the wall 9 a in the bore k of the union nut 1 arranged annular groove 10 rest. The snap ring 8 is provided in a manner known per se with a slip that is not shown in detail. At each end of the tubular connecting piece 5 there is at least one ring-shaped sealing edge 12 which, when the union nuts 1 are tightened, on an end surface 11 'of the tubular parts 2 and "5 at right angles to the tube axis, under a seal between the tubes 2 and 3 and the connecting piece 5 causing pressure reaches the system.

The assembly of the pipe union is relatively easy to accomplish. First, the outwardly tensioning "rings 8 are pushed over the tubular connecting piece into an annular groove 7 of the same. Then there is a displacement of the union nuts 1 with their gripped, threadless ends 13 over a recess of the connecting piece 5 and over the in the ring groove 7 of the Connecting piece 5 located snap rings 8 until they are in the area of the inner annular groove IO of the union nut 1 and are pressed against the conversion of the annular groove 10 by their own clamping force. In this state it is then possible to move the union nut 1 in such a way that the snap ring 8 over the paragraph 6 of the annular groove 7 of the connecting

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Piece 5 arrives, as can be seen from FIG. 1 is.

The connection of the connector 5 with the tubular Parts 2 and 5 are done in a simple V / eise by tightening one or both union nuts 1 until the ring-shaped Edge 12 of the tubular connecting piece 5 strikes against the end surface 11 of the tubular part 2 or jj and the further tightening of the union nut- 1 after reaching the stop with a predetermined tightening torque is no longer possible. Here is byc. the surfaces brought into contact with one another under pressure - the end surface 11 of the tubular parts 2 or 3 and the surface of the annular edge 12 of the connector 5 - a metallic seal is made.

This screw connection advantageously enables one simple assembly of pipelines while maintaining small dimensions with the help of T-pieces and elbows, without that here between the individual screwing parts Pipe connectors that are to be cut to length or processed subsequently have to be used.

Claims (1)

S c h u t ζ a η s ό r u c h Threaded connection for tubular parts, in particular tubular T-pieces and / or elbows, rr.it two union nuts that can be screwed onto the tubular parts and a tubular connector., characterized in, that the tubular connecting piece (5) zv; egg with a shoulder (6) provided annular grooves (7) in which snap rings (8) are arranged to rest in the mounted state of the pipe screw connection each on a wall (9) one in the bore (^ r) of the Ueberwurfmutfcern (1) arranged annular groove (iO), and that at each end of the tubular connecting piece (5) at least one annular Sealing edge (12) is arranged, which each to rest on a perpendicular to the pipe axis End surface (11) of the tubular parts (2) and (3) are intended to create a seal between the tubular To effect part (2) or (3) and the connecting piece (5). March 1971