DE1000898B - Fixed pipe connection for copper pipes for high frequency cable production - Google Patents

Description

GERMAN

For the manufacture of high-frequency quays, up to 300 m long copper pipes are required. For this purpose, lengths of about 14 m are generally required connected with each other. So far the procedure has been that one narrowed one end of the pipe and this one into the other Tube end plugged in and soldered. With this manufacturing method, however, occurred in the course of further processing at the so-called goblet seam, often on all seam breaks. Another disadvantage of this method consists in the fact that the pipe outer surface has to be reworked to a considerable extent, which is especially true of Kabekobren for high-frequency cables has an unpleasant effect, as this has no traces of post-processing, such as File lines or the like. May have.

For the metallic fusing of hollow bodies, a method is known in which the ends of the tubes to be fused are widened in a funnel shape, pushed over an annular body and then fused together. After fusion, so much weld metal is applied ¹ then that the Verschmelzungsstdle outside undergoes a wul'startige gain. But not the tubes so produced are suitable · for the obengenantntten purpose as they once experienced in making an expansion and secondly any bead with copper pipes, such as those in the high-frequency cable ¹ -fabrikation used is intolerable.

There is also a connection for hollow parts from. in which find electrical wires known a rope inner HoH-in · lying and zm outer deformable joint use. The inner connecting piece consists of a double cone forming an inwardly directed depression and the outer one of a metal sleeve that is thickened towards the center. After inserting the inner double cone in the hollow rope ends and after tapering the ends, the thickened metal hüfce is pulled so tightly against the rope ends and the inner double cone by plastic deformation that the connection point has the same diameter over its entire length as the hollow ropes to be connected. However, this method of working cannot easily be transferred to copper pipes for high-frequency cable production, since a conical: tapering of the pipe ends is not possible in a satisfactory manner without additional, cumbersome operations and the strain hardening of the connection point associated with the plastic deformation of the outer connecting piece in pipes for high ^ frequency cable is not portable.

Finally, a releasable coupling device for connecting two concentric high-frequency power lines is known, in which the fixed pipe connection for copper pipes
for high frequency cable production

Applicant:
Feiten & Guilleaume Carlswerk

Corporation,
Cologne-Mülheim, Schanzenstr. 24

Dipl.-Ing. Paul Grünenwald, Cologne-Mülheim,
has been named as the inventor

^{Inner conductors are held in the end 1} sleeves of the outer conductor by conical IsoHerstücke and the detachable connection of the lines is achieved by a type of bayonet lock.

In order to remedy the difficulties outlined at the outset, an insoluble one is used according to the invention Pipe connection proposed), which only started the production of high-quality copper pipes for high-frequency cables enables. The invention consists in that the provided with conical Ausdrehungeii Pipe ends pushed over a double cone tapering towards both ends and are soldered to him that the connection point a has a cylindrical and absolutely smooth outer surface.

The best way to make this connection is to first clamp the tubes in the lathe centering chuck and provide them with a conical recess at both ends, which is controlled by a gauge. Then a double cone that matches the pipe turning nut in FIG. ¹ is also made on the lathe and checked with a control gauge. Now a sheet of soldering silver bent into a conical sleeve is inserted into each pipe end, the double cone is inserted, and the soldering, which is expediently carried out on an electric soldering machine, is carried out. Such a soldering process, which is independent of the operation, ensures a uniform result and has the advantage that only a slight post-processing of the pipe outer surface, leaving no traces behind, is required.

In the drawing, for example, a pipe connection produced according to the invention is shown schematically shown. With 1 and 2 pipe ends are designated,

609 766/331

which are provided with conical recesses 3 and 4, respectively. 5 shows the double cone, which has the recesses 3 and 4 has been worked accordingly.

For example, the proposed pipe connection holds 28.6 X 25 mm in diameter for a pipe at least ten bends when bending back and forth by a radius of 500 mm without a crack. It also ensures an exact cylindrical robot surface, which in particular is independent of the eccentricity of the copper pipes that is always present. About that In addition, the pipe connection is economical, with considerable savings in labor and soldering silver can be produced.

Claims (1)

PATENT CLAIM: Non-detachable pipe connection for copper pipes for high-frequency cable production, thereby characterized in that the pipe ends provided with conical recesses so> pushed over a double cone tapering towards its two ends and soldered to it that the connection point has a cylindrical and absolutely smooth outer surface. Considered publications:
German patents No. 291 662, 680 208,
687 1 sheet of drawings