Fire resistant conduit insert for optical fiber cable

G - Physics – 02 – B

Patent

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Details

IPC codes

G02B 6/44 (2006.01) F16L 9/19 (2006.01) F16L 11/12 (2006.01) F16L 11/22 (2006.01) A62C 3/16 (2006.01)

Type

Patent

Patent number

CA 2477807

Description

A flexible fire resistant innerduct structure (10) is configured to contain a cable within a conduit (12). The innerduct structure (10) includes a pair of adjacent strip-shaped layers of flexible material (16, 18, 20, 22) that are joined along their longitudinal edges (25) to define a channel (14) through which the cable can extend longitudinally through the innerduct structure (10) between the layers. The adjacent layers have differing widths between their longitudinal edges (25), whereby the wider layer bulges away from the narrower layer to impart an open configuration to the channel (14). Other features of the innerduct structure (10) relate to the material of which it is formed. Such features include the structure of the material, such as a woven structure, and further include properties such as melting point, tensile strength, fire resistance, elongation, coefficient of friction, crimp resistances and compression recovery.

L'invention concerne une structure intratubulaire souple résistant au feu conçue pour recevoir un câble dans un conduit. Cette structure intratubulaire comprend une paire de couches adjacentes en forme de bandes d'un matériau souple qui sont assemblées le long de leurs bords longitudinaux de façon à définit un canal à travers lequel le câble peut s'étendre longitudinalement dans la structure intratubulaire entre les couches. Les couches adjacentes présentent des largeurs différentes entre leurs bords longitudinaux. La couche la plus large se replie ainsi de la couche la plus étroite afin de conférer au canal une configuration ouverte. D'autres caractéristiques de la structure intratubulaire concernent le matériau dont elle est composée. Parmi ces caractéristiques figurent la structure du matériau, telle qu'une structure tissée, ainsi que certaines propriétés telles que le point de fusion, la résistance à la traction, la résistance au feu, l'allongement, le coefficient de friction, la résistance à l'ondulation et la récupération suite à une compression.

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