FR2790055A3 - Pipe coupling with tubular body and nut has inner ring with stepped spherical surfaces to allow for misalignment of connected pipes - Google Patents

Abstract

The pipe coupling consists of a tubular body (1) with threaded outer surfaces (2, 3) of different diameters and a seal (4) set in a groove in one end to receive a ring held in place by a nut (12). The ring is in two sections (6, 9), one with a recess (7) for a seal (8) and the other with stepped spherical surfaces. The smaller spherical surface is designed to fit against a concave spherical surface of the first section (6), while the larger one (10) fits against a concave spherical surface (13) of the nut (12).

Description

FITTING FOR COUPLING PIPES

  The present invention relates to a connector allowing

to couple pipes.

  This connector is of the type which may comprise two or more coupling flanges and forming a tubular body provided, at least at one of the openings, with an annular seal against which a hoop is applied.

  retained by a nut coupled to this tubular body.

  When coupling between pipes or coupling a pipe to a valve, it sometimes happens that this direct coupling results practically impossible when the pipe to be coupled is not axially opposite the opening which must receive it , case in which it is necessary to provide for the installation of intermediate elbows allowing this coupling, all of this

  bidding on the installation to be carried out.

  This drawback has been eliminated thanks to the fitting which is the subject of the present invention, the main characteristic of which is the fact that the hoop consists of two parts, one of which forms a ring which is applied against the annular seal already mentioned, while the 'other part is constituted by a ball joint, reason for which its external surface is spherical, the retaining nut already mentioned comprising a rear opening whose concave internal surface corresponds to this spherical surface, the ring already mentioned also having a surface concave interior corresponding to

this sphericity.

  This ring has an annular groove where

  houses a seal which is pressed by the ball joint.

  These and other features are

  will understand better thanks to the detailed description below

  afterwards, accompanied by a sketch board intended to facilitate this understanding, a board on which a practical embodiment has been shown only given by way of nonlimiting example of the scope of the

present invention.

  In these drawings: FIG. 1 shows in side elevation the connection in question and FIG. 2 illustrates this same connection seen in longitudinal section. According to the drawings, the connector intended for

  the coupling between pipes has a tubular body -

  1- which externally has a double diameter with its two threads -2- and -3-, the rear face of this tubular body having an annular groove -4- o is housed

an annular seal -5-.

  It is applied against this seal a ring -6- which at its lower-posterior part has an annular groove -7-, in which is housed an annular seal -8-. Against this ring and this joint exerts a pressure a hinge-ball joint -9- which has a spherical surface -10- on the outside, this hinge-ball joint having a double diameter of which the smallest is applied against the concave inner surface -11- of the ring -6-, while

  against the largest diameter of the hinge-ball joint -9-

  apply a nut -12- which couples to the thread -3- of the

  tubular body -1- and present on the internal surface -

  13- from its rear opening a concavity corresponding to

  the spherical surface of the ball joint.

  Thanks to this structure, when the nut -12- is not fully coupled, it is possible for the hoop-ball joint - 9- to adopt an inclination and an orientation allowing it to receive axially over its opening.

  rear -14- direct coupling of the pipe -T-.

  It will be understood that the structure of the tubular body can have different constitutions, form two or

  multiple openings and be part of a valve.

Claims (4)

  1. Fitting for coupling pipes, comprising a tubular body provided, at least at one of its openings, with an annular seal against which a hoop retained by a nut coupled to this tubular body is applied, characterized by the fact that the hoop consists of two parts, one of which constitutes a ring which is applied against the annular seal already mentioned,   while the other part is constituted by a fret-   ball joint whose outer surface is spherical, which is why the retaining nut has a rear opening whose concave internal surface corresponds to this spherical surface.   2. Connection according to claim 1, characterized in that the concave inner surface of the ring already   mentioned corresponds to the sphericity of the ball joint.   3. Connection according to claim 1, characterized in that the mentioned ring has an annular groove in which is housed a seal pressed by the hinge-ball joint.   4. Connection according to claim 1 characterized in that the annular seal of the tubular body is housed   in an annular groove on its rear face.