Pressure pipe with formed connecting head

A pressure pipe, pressure technology, applied in the direction of pipes/pipe joints/pipes, connections for packing and sealing with fluid pressure, pipes, etc., can solve cumbersome problems, reduce the formation of upsetting wrinkles, and improve the strength of use.
CN1959174AActive Publication Date: 2007-05-09MAN ENERGY SOLUTIONS SA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
MAN ENERGY SOLUTIONS SA
Publication Date
2007-05-09

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Abstract

The pressure line, for example as a high-pressure fuel injection line, has a cold-worked connection (1) at the end of the line (16). The joint (1) is frustoconical and has a surrounding sealing surface on its enveloping surface, which is pressed against the connection part with a corresponding fit by means of a preload transmitted via the pressure shoulder (10). Wherein the outer surface of the pipe (16) encloses an angle greater than 90° with a surface of the pressure shoulder (10).
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Description

technical field

[0001] The invention relates to a pressure pipe with a formed joint, and in particular a high-pressure fuel injection pipe with an upset joint. Background technique

[0002] The pressure line, which is the object of the invention, is used as a fuel injection line for conveying fuel on an injection system or as a hydraulic line. In order to be able to tightly connect the pressure tube to other components, the end of the pressure tube is made frusto-conical. Cold working is used in the prior art as an economical variant for producing such joints. The results of the methods known from the prior art are shown, for example, in the publications US 6,286,556 B1 and DE 103 58 373 A1 by means of fuel pipes.

[0003] This prior art is also shown in Figure 1, showing in section the frusto-conical joint and the pipe interior deformed by pressure pipe upset. In this embodiment of the prior art, the sealing of the part to which the pressure tube is to be connected is ac...

Claims

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