FR2953269A1 - Signaling stand for buried lengthened object e.g. electric cables to indicate presence and/or position of object in ground, has envelope made of geotextile band, where envelope masks object to be protected on part of length of band - Google Patents

Abstract

The stand has a data carrier realized in a form of a protection envelope (1) that is made of geotextile band, where the envelope masks an object (5) to be protected on a part of a length of the band. The geotextile band consists of a single cloth including central layers made of non woven material. The data carrier is made of an external layer of a shell laid out around the object. The central layer is coupled with the external layer, where the external layer comprises a density higher than that of the central layer. An independent claim is also included for a method for installation of a signaling stand intended to be buried with an object.

Description

"Signaling medium for a buried elongated object, such as a cable or a pipe."

The invention relates to the field of signaling objects, especially long and buried, such as cables, pipes, pipes, etc. For convenience, the word "conduct" is used throughout the text to designate without restriction any type of elongated object such as a cable, channel or the like.

There are known conduit signaling means buried with the latter, which are made in the form of mesh placed above or below the technical line. These signaling means are intended to indicate the position of these pipes in the ground, for example to help find them or to prevent any degradation when excavation or earthworks are engaged in the area in question. These signaling means meet standards, standards, or recommendation guides, indicating by their color or type, the type of pipe buried in the ground, for example a gas pipe.

Signaling means are also known in the form of rigid or semi-rigid HDPE, for example of the Janoflex® branded, smooth or corrugated protective sheath. This type of sheath is on the general shape of preformed tube in which the pipe must be threaded by one end, or by a side blank having an opening along a generatrix tube. Sheaths of this type are tinted according to standards, standards or guidelines: - red or black with red stripe for electrical cables, - blue or black with blue stripe water networks, - yellow for gas pipes, - Green or black with green bands for telecommunication networks, - Orange and white for fiber optic networks, or other differentiating color requested by the operator, for example green.

Such signaling means are: - 2

- located at a distance from the pipe itself (in the case of a warning grid), which is not optimal because it is imprecise and degradable, - either brittle, expensive, and difficult to arrange around the pipe (in the case of HDPE sheath). In the latter case, the establishment of the protective / signaling sheath is generally not mechanized and is carried out by entire section of the pipe, prior to burial. The sheath is tinted in the mass, which generates significant manufacturing costs, or when a single band or edging color is provided on a generally black sheath, it or it is sometimes difficult to locate.

For this purpose, the subject of the invention is a signal carrier intended to be buried with an object having a generally elongated shape such as a cable or a pipe, and intended to indicate the presence and / or the type of said object placed in the vicinity of the signal medium, wherein the information carrier is formed in the form of a protective envelope at least partly in geotextile, which is coated on the object to be protected over at least a part of its length.

A signaling medium of this type is inexpensive, resistant and can be set up automatically around the object by suitable mechanical equipment.

According to other advantageous features of the invention, the protective envelope is derived from a strip of geotextile.

According to still other advantageous features of the invention, the geotextile strip consists of a single ply comprising at least one layer of nonwoven material, the information medium being at least constituted by an outer layer of the protective envelope arranged around the object.

According to still other advantageous features of the invention, said at least one layer is a central layer made of a nonwoven material contiguous.

at least one outer layer covering the core layer on at least one side.

According to still other advantageous features of the invention, the outer layer has a higher density than that of the core layer.

According to still further advantageous features of the invention, the longitudinal edges of the geotextile strip are folded over one another so as to have an overlapping zone extending along the object to protect.

According to still other advantageous features of the invention, the signaling support further comprises a holding wire wound helically around the protective coating over at least a part of the length of said object.

The invention also relates to a method of setting up a signal carrier intended to be buried with an object having a generally elongated shape such as a cable or a pipe, and intended to indicate the presence and / or the type of said object placed in the vicinity of the information medium, in which the signaling medium is made in the form of a protective envelope at least partly made of geotextile which is gradually coated at least partly the object to be protected to as one moves along said object and that it is able to be buried, once covered by the envelope.

A gradual implementation is carried out continuously, as the course of the line from a drum, and as the preparation of it before burial. The placement of the signaling support on the object and its preparation for burial are performed simultaneously and automatically, prior to burial.

The invention also relates to an installation for setting up a signaling support around an object having a general shape - 4

elongated cable such as a cable or pipe, characterized in that said installation comprises means for implementing the above method.

The invention will be better understood on reading the following description of a non-limiting embodiment of the invention and in the light of the appended drawings in which:

FIG. 1 represents an enlarged cross section of a signaling support part according to the invention; FIG. 2 represents a cross section of several long objects covered with a signaling support according to the invention.

The signal carrier is intended to be buried with an object having a generally elongated shape such as a cable or conduit. This signaling support is made in the form of a geotextile protective envelope placed around the pipe to be protected over at least part of its length. With reference to FIG. 1, the envelope is in the form of a geotextile strip 1 consisting of a single sheet. This sheet comprises one or more layers 2, 3, 4 of nonwoven material. In the illustrated example, the envelope comprises three layers, namely a central layer 2, framed by two outer layers 3, 4. The density of the central layer may be lower than that of the two outer layers. This type of envelope is typically of the same type as the geotextile strip described in FR2 874 246A. The information carrier according to the invention consists either of one of the layers of the strip located on the outer side when the strip is arranged around the pipe, or not two outer layers 3, 4 of the strip, or even by all the layers of the band. The information medium takes the form of one or more colored layers, the dyeing being able to be carried out either in the mass of the geotextile layer, or in the form of a film or coating, for example by painting applied on the surface of one or more layer (s). 10 - 5

The shades comply with standards, standards or recommended guidelines - red or black with red stripe for electrical cables, - blue or black with blue stripe water networks, - yellow for gas pipes, - green or black with green bands for telecommunication networks, - orange and white for fiber optic networks, or other differentiating color requested by the operator, eg green.

The placement of the signal carrier in the form of an envelope around the pipe is typically carried out as presented in FR 2 874 246A supra. This document indeed describes a device and a method for protecting a pipe in which an envelope consisting of a strip, in this case made of a geotextile material, is arranged around the pipe using a shaper passing the casing from the wrapped tape condition to a sheath surrounding the pipe as the shaper moves along the pipe. The pipe 5 comes from a drum (not shown) comprising a driving reserve, which will be unwound as the progress of the shaping device (not shown) along the trench intended to receive the protected pipe. . The pipe is introduced through an inlet channel in the shaping device, guided by a set of rotating rollers. This pipe is then introduced into a shaper, at the same time that the casing is unwound from a corresponding drum comprising an envelope reserve. The pipe is at the entrance of the shaper above the envelope. The inlet of the shaper comprises a guide mouth having a flared shape, similar to a funnel half-cone. As the pipe and the casing are introduced into the shaper together, the lateral edges of the casing are folded over one another so as to form a protective sheath. This operation is carried out by a system of walls and / or rollers (not shown) forcing the envelope to progressively take the form of a sheath as and when it is necessary.

introduction into the shaper. A more complete description of these means of conformation is presented in the document FR 874 246 A. It is noted that several pipes can be arranged in the same envelope (FIG. 2). The attachment of the casing 1 is ensured either by covering and welding the lateral edges of the casing, or by means of a so-called "spiral" equipment which surrounds the geotextile sheath with one or more ribbons all over the casing. length required, or using one or more son stretched helically around the sheath. In the latter two cases, the spiral must move together with the shaper along the pipe or vice versa. Thus, with reference to FIG. 2, the signaling support is placed around the pipe 5, in this case several pipes 5. The longitudinal edges of the shell 1 are folded over one another so as to present an overlap zone 6. A wire or a holding band (not shown) is then helically arranged around the casing 1, using a spiral winder, to hold around the driving the envelope 1 as a signaling medium.

Of course, the invention is not limited to the means which have just been described. Modifications can be made and thus define alternative embodiments without departing from the scope of the invention.

Claims (9)

REVENDICATIONS1. Signaling support intended to be buried with an object (5) having a generally elongated shape such as a cable or a pipe, and intended to indicate the presence and / or type of said object placed in the vicinity of the information carrier, characterized in that the information medium is in the form of a protective envelope (1) at least partly made of geotextile, the object (5) of which is coated on at least a part of its length. 2. Signaling medium according to claim 1, characterized in that the envelope (1) protection is derived from a strip of geotextile. 3. Signaling medium according to claim 2, characterized in that the geotextile strip consists of a single layer comprising at least one layer (2, 3, 4) nonwoven material, the information carrier being at least one of an outer layer of the protective envelope disposed around the object. 4. Signaling medium according to claim 3, characterized in that said at least one layer is a central layer of a nonwoven material contiguous to at least one outer layer covering the central layer on at least one side. 5. Signaling medium according to claim 4, characterized in that the outer layer has a density greater than that of the central layer. 6. Signaling support according to any one of claims 2 to 5, characterized in that the longitudinal edges of the geotextile strip are folded one over the other so as to have an overlapping zone extending along the object to be protected. 7. Signaling support according to any one of claims 1 to 6, characterized in that it further comprises a retaining wire wound helically around the protective envelope, on at least a part of the length of said object. A method of placing a signal carrier to be buried with an object having a generally elongated shape such as a cable or conduit, and for indicating the presence and / or type of said object placed in the adjacent to the signal medium, characterized in that the information carrier is in the form of a protective envelope at least partly made of geotextile, the object to be protected being progressively coated at least partially with one moves along said object and that it is able to be buried, once covered by the envelope. 9. Installation for placing a signal carrier around an object having a generally elongated shape such as a cable or a pipe, characterized in that it comprises means for implementing the method according to the invention. claim 8.