FR2678710A1 - Quick and controlled breakage device for assemblies to be taken apart - Google Patents

Abstract

The invention relates to a device making it possible to obtain the quick and controlled breakage, along a transverse plane, of an assembly in which it is interposed, when the latter is subjected to an axial tensile load. A circumferential undulation is deformed radially by longitudinal tension on its ends and presses against a sharpened circular stop piece which gives rise to its breakage by punching and shearing. This device allows the quick and controlled separation of assemblies for the transfer of fluid, of mechanical assemblies, and of assemblies with flexible connection.

Description

Quick and controlled breaking device for dissociated assemblies.

 The present invention relates to a device for obtaining ~ rapid and controlled rupture, along a transverse plane, either of a fluid transfer assembly, or of mechanical assemblies or of flexible link assemblies, in which it inserts, when these are subjected to an axial tensile force.

 Generally the rupture is obtained by prior weakening of an area of the assembly, thus introducing a weakened part which will break under the effect of a given axial force. This can pose problems if, for example the assembly must contain before broken dexter, a pressurized fluid, undergo a thermal shock or be subjected to any other incompatible stress

 The device according to the invention is characterized by the radial deformation of a circumferential undulation coming to tear on a sharp stop of circular shape.

The device, which can be made of any material, consists of a corrugated part connected at its 2 ends to the assembly to be separated. The sharp circular stop is positioned in the bottom of the wave. This stop can be reinforced to avoid its radial deformation.

One end of the device will be close to a fixed point the other will be subjected to an axial tensile force. This force will have the effect of the development of the corrugated part, towards the outside if the wave is formed towards the inside, or vice versa, which will then press on the sharp stop and will thus be punched and sheared. The mechanical resistance and the total thickness of the material constituting the corrugated part is dimensioned to determine the value of tensile force Similarly, the dimensioning of the depth of the corrugated part and the diameter of the sharp part make it possible to regulate the linear displacement of the axial traction, before rupture.

According to particular embodiments -The device is inserted between the two assemblies to
dissociate.

-The attachment of the device, at its two ends, on the assemblies can be done in different ways, depending on the constituent material = by welding, by brazing, by gluing, -by mechanical clamping or any other means.

-The revolutive shape of the device, in its area to be connected, will be adapted to the method of attachment used: raised edge, cylindrical shape, or other suitable shape.

-The device may include several or only part of the wave with a "U" profile or any other form of profile whose particularity is to be able to deform under the effect of traction.

-The circular sharp stop will consist of one or more pieces, it may include all kinds of sharp, sharp, punching profiles and possibly undergo any heat treatment.

-The sharp stop can be located inside or outside the assembly
The accompanying drawings illustrate the invention:
Figure 1 shows in section, the device with external sharp stop according to the invention.

Figure 2 shows in section, the device with internal sharp stop according to the invention.

With reference to these drawings, the device includes:
A corrugated part (1) formed towards the inside of the tube (fiv.1) or formed towards the outside (fig.2).

The drawings show the device inserted between two metal tubes (2). The device is fixed by welding the raised edges on the tubes.

A sharp circular stop (3) positioned in the hollow of the wave, outside (fiv. 1) or inside (fig. 2).

This stop is reinforced by one or two or more rings (4), in which the stop comes to fit and between which it is tightened using screws (5).

The stop can also be reinforced by a tube (6) (fig.2).

Each additional wave can be fitted with a sharp stop.

The device according to the invention is particularly intended for the rapid and controlled separation of fluid transfer assemblies, mechanical assemblies, flexible connection assemblies

Claims (8)

 REVhNDICATlQNS 1) Rapid and controlled breaking device which is inserted between the two assemblies to be dissociated, and when these are subjected to an axial tensile force, characterized in that it comprises a corrugated circumferential part (1) coming tear on a sharp circular stop (3). 2) Device according to claim 1) characterized in that the corrugated part can be made of various materials. 3) Device according to claim 2) characterized in that the ends of the corrugated part to be connected with the two assemblies to be dissociated can be of different shapes. 4) Device according to claim 2) characterized in that the ends of the corrugated part can be fixed to the assemblies to be dissociated by welding, by soldering, by gluing, by mechanical tightening or any other means depending on the nature of the materials used. 5) Device according to claim 2) characterized in that the thickness of the corrugated part and the value of its meridian developed are dimensioned for the tensile force and the movement leading to rupture. 6) Device according to claim 1 characterized in that the circular sharp stop (3) is reinforced by 1 or more rings (4) or a tube (6). 7) device according to claim 2) characterized in that the circular sharp stop (3) can fit into the reinforcing ring (s) (4) and that it can be clamped between them using screws (5). 8) Device according to any one of the preceding claims, characterized in that the circular sharp stop (3) can be made up of several pieces and include all kinds of sharp, cutting and punching profiles. S) device according to any one of the preceding claims, characterized in that the circular sharp stop can be either inside or outside the corrugated part depending on whether the wave is formed inwards or outwards. exterior 10) device according to any one of the preceding claims, characterized in that it can consist of several waves each equipped with a sharp stop.