DE1928403A1 - Detachable connection for pipelines - Google Patents

Description

Detachable connection for pipelines.

The present invention relates to a detachable connection for pipelines, preferably for silencer systems in Ikaftfahrteugen.

It provides an easy-to-install adhesive connection for gas-tight connecting low-pressure pipes.

When connecting pipelines, e.g. in the case of silencer systems For motor vehicles, there are problems with the pipes being inserted into one another to seal at the connection points. The use of flanges is for reasons the saving of space and not possible for cost reasons. So far one has tried that To seal connection points with a clamp connection using pipe clamps, However, it has been shown that the connection for pipelines is not too tight connections drive, mostly the hot exhaust gas blows b.t motor vehicles at this point from the pipeline.

The present invention is based on the object of a gas-tight and to show easily mountable clamp connections for high pressure pipelines. with which a quickly producible and simple to assemble and assemble and very cheap prebinding made and the connecting element used repeatedly can be.

This object is achieved in that over a Small diameter pipe slidable with a union nut vitt conical internal thread is arranged, the inner diameter of which is smaller than the outer diameter of the to be connected pipe of larger diameter and that the larger pipe through the Screwing in the union nut is pressed onto the pipe of lesser diameter.

In order to facilitate the screwing in of the union nut, according to a Continuation of the invention, the pipe end of the pipe to be pressed on with an angle <15 °, preferably 7 - 10 ° chamfered. Another advantageous embodiment is fiction according to characterized in that the end of the pipe to be pressed is provided with several slots on its circumference. Through this will an easier compression achieved. Extensive tests have shown that even with repeated loosening of the connection and renewed screwing in of the union nut A firm and sufficiently gas-tight connection is achieved in the same piece of pipe In the figure is a section of the releasable connection according to the invention Pipelines shown, it is shown how about the pipe 1 of smaller diameter a union nut 2 is arranged displaceably. This upper throw nut 2 has a conical inside; thread 4, at least over part of its length. To their rivers Perimeter are holes 5 for inserting a tool to tighten the nut of Hand arranged. However, these holes can also be on the rear face be arranged. The pipe 1 of smaller diameter is used when assembling the pipeline introduced into the tube 3 of larger diameter. This tube 3 is at its front End b chamfered with an angle <ISo, preferably with an angle accordingly the cone of the internal thread of the upper nut 2. Alternatively or additionally the pipe end can also be slotted in several places. After this interlocking the union nut 2 is then screwed onto the pipe 3. During this screwing-in process the tube 3 is pressed at its front end due to the conical thread surface firmly and gas-tight on the pipe 1.

Have experiments on pipes on mufflers on motor vehicles shown that the pipe connections can be made very quickly and ds after Repeated loosening and reconnecting even the same pipes does not blow off the Exhaust gas occurred.

It is still seen as particularly favorable that the union nut can be used again and again, while in Rohrachelle known type after each Loosen had to be renewed.

In an experiment on a muffler arrangement in which the Connection atelle of the two pipelines directly at the pipe point as a result a hole in one of the pipelines to escape exhaust gas, was not after removing the more usable pipe clamp passed the union nut over one pipe, then a tinplate strip (cut open can) in the damaged area wrapped and then carefully tightened the union nut. It turned out that drive the vehicle again with this temporarily repaired silencer system could, without that, blow out exhaust gas and an increase in noise was detected could be. This showed that the arrangement according to the invention can also be carried out is well suited for provisional repairs.

Furthermore, it has been shown to be advantageous that the invention according to Arrangement can also be used to connect two pipes of the same diameter can. In this case, a piece of pipe is pushed into the two pipes to be connected and the two Rohrc pushed together until they touch their end faces, then either a sheet metal strip or a plastically deformable strip, e.g. rubber, pushed over the connection point and then the union nut according to the invention turned up

Claims (4)

P a t en t a n s p r ü c h e 1.) Detachable connection for pipelines, preferably for silencer systems of motor vehicles, characterized in that K with a union nut slidable over a tube 1 of smaller diameter conical internal thread 4 is arranged, the inner diameter of which is smaller than the outer diameter of the pipe 3 of larger diameter and therefore the pipe 3 through the findrohen the union nut 2 is pressed onto the tube 1. 2.) releasable connection according to claim 1, characterized in that the pipe end 6 of the pipe 3 to be pressed on with a <15 °, preferably 7 - Is beveled 10 °. 3.)) Lösb3re connection according to claim 1 or 2, characterized in that ¢ nnzeich- ,, that the pipe end 6 of the pipe 3 to be sprouted open on its circumference with several slots is provided. 4.) releasable connection according to claim 1, characterized in that at least one bore 5 is arranged on the circumference of the union nut 2.