DE7502960U - PIPE CONNECTION DESIGNED FOR A HOUSING WITH A CONNECTOR - Google Patents

Description

R. 2 5 49

January 27, 1975 He / Kb .. ■.: ..- ·. U

Attachment to
Utility model registration

ROBERT BOSCH GMBH, 7 Stuttgart

Pipe connection intended for a housing with a connecting piece

The innovation relates to a pipe connection intended for a housing with a connecting piece, which is connected to a Union nut is provided and in which the connection piece at its free end has a sealing surface for sealing attachment has a connecting pipe.

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Such a pipe connection is known. However, the connecting pipe always carries the union nut, which thereby can be easily lost.

According to the innovation, this is avoided in that the connecting piece has a cylindrical shape in its outer surface Has recess into which a collar of the union nut is captively pressed by plastic diameter narrowing is, and that the threaded part of the union nut with a threaded connector attached to the connecting pipe is screwed. and that the collar of the union nut The remaining axial length of the recess on the connecting piece is only slightly greater than the length of the threaded part.

An advantageous development of the innovation for an -angled Pipeline is achieved according to a further feature in that the pipeline is at right angles to the threaded connector and is soldered in this. This avoids pipe bends and it very short lengths are achieved.

Other advantageous developments of the pipe connection emerge from the subclaims.

Several embodiments of the innovation are shown in the drawing, namely show:

1 shows a first embodiment of a pipe connection, FIG. 2 shows a second embodiment of a pipe connection, FIG. 3 shows a third embodiment of a pipe connection.

A pipe connection has a connection piece 1 which is fastened in the bore 2 of a housing 3. The connecting piece 1 has a cylindrical recess 5 in its lateral surface 4, into which a collar 6 of a union nut 7 passes

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plastic diameter narrowing of the collar 6 is pressed. As a result, the union nut 7 is on the connecting piece 1 held captive.

A threaded part 8 of the union nut 7 is screwed to a threaded connection piece 11 fastened to one end 9 of a connection pipe 10. The fastening of the threaded connector 11 is carried out in such a way that the connecting pipe end 9 is bent up conically at an angle c / L of about 60 ° and with an inner surface a counter-sealing surface 12 for a conical sealing surface 13 with a surface seal (see left picture) or for a spherical sealing surface 13 'with a line seal (see right side of the picture) of the connection piece 1 and with an outer surface a cold surface 14 for the threaded connection piece 11. The linear seal means that a cutting ring or an elastic ring seal is not required. The axial length L of the recess 5 on the connecting piece 1 that remains free from the collar 6 of the union nut is only slightly greater than the length L of the threaded part 8.

FIG. 2 shows, while largely retaining the reference numbers from FIG. 1, a somewhat modified type of construction Pipe connection. Here, a connecting pipe 15 has a smooth pipe end 1β, which is in a cylindrical inner recess 17 a threaded connector l8 is firmly soldered. In this way, the threaded connection piece 18 itself then has a counter-sealing surface 19 for the sealing surface 13 or 13 'of the connection piece 1. As can be seen in the drawing, covered after assembly, part of the thread of the union nut crosses the endangered cross-section shown in dash-dotted lines of the threaded connection piece l8. This makes the pipe connection even more secure and can absorb large radial forces.

Finally, FIG. 3 shows a third type of pipe connection, again using the same reference numbers for the parts already described.

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A threaded connector 20 is pierced at right angles and takes in this bore 21 on a connecting pipe 22, the is provided with a cross-hole to make the line connection. Connection piece 20 and connection pipe 22 are soldered together. The other parts correspond to the design according to FIG. 2.

With the embodiment according to FIG. 3, it is possible to create line bends to avoid and to achieve very short lengths of the pipe connection.

In the embodiments according to FIGS. 2 and 3, too, it is advantageous if the mating sealing surface 12 has a 60 ° sealing cone Has. Then opposite the convex sealing surface 13 'becomes a very high sealing force achieved through the radial forces generated when screwing.

It is on the hard that the spherical sealing surface 13 instead of on the connection piece 1 also on the counterpart (end 9, connection piece 18,2O) can be appropriate. Then the sealing surface on the connection piece 1 must be conical.

For the embodiments according to FIGS. 2 and 3, it is important that the length of the recess is dimensioned so that the union nut 7 is movable by the thread length axia] to loosen the screw connection. The threaded connection piece 11 can then be rigid installed, i.e. it can be axially and radially immovable. Since the union nut 7 is only slightly in the axial direction has more than the axial freedom of movement required to loosen the screw connection, it always remains roughly at the for gripping same place. This is important for the engine mechanic because then the accessibility of the nut 7 always remains the same.

The three pipe connections described have a firm and tight connection even without additional sealing rings. she

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are temperature-resistant and have a high sealing force. Stress cracks the threaded connection pieces 18 and 20 hardly occur through the union nut cover. The union nut can be screwed without the threaded connection piece 18 or 20 changing its position, a pipe connection after the Innovation builds very short.

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Claims (1)

Expectations 1. Pipe connection intended for a housing with a connecting socket, which is provided with a union nut and in which the connecting piece has a sealing surface at its free end for sealing a connecting pipe, characterized in that the connecting piece (I) 'in its outer surface (* l) has a cylindrical recess (5) into which a collar (6) of the union nut (7) by plastic diameter narrowing Is pressed in captive, also that the threaded part (8) of the union nut (7) 'with a on the connecting pipe (10,15,22) fastened thread connecting piece (11,18,20) can be screwed and that the collar (6) of the Union nut, axial length (L) of the recess remaining free (5) on the connecting piece (1) only slightly greater than the length (1) of the threaded part (8). 2. Connection piece according to claim 1, characterized in that the threaded connection piece (18.20) on the connecting pipe (15.22) is soldered on and the mating sealing surface (19) for the sealing surface (13) of the connecting piece (I) has .. 3. Connection piece according to claim 2, characterized in that that after assembly, an endangered cross-section of the threaded connector (18) is covered by part of the thread of the union nut (7) (Fig. 2). -7- 7502960 08/12/76 k. Connection piece according to Claim 2 for an angled pipeline, characterized in that the connection pipe (22) runs at right angles to the thread connection piece (20) and is firmly soldered in this. 5. Connection piece according to one of claims Ibis 1, characterized in that one of the two sealing surfaces (12/13 *, 19/13 ') is convex and that its counter-sealing surface has an angle <L of 60 °.