Method for installing cables in ducts using a pressurized fluid and a device for carrying out said method
AssigneeKoninklijke KPN N.V.
InventorsWillem Griffioen, Harm Geert Nobach
Life of this patent
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Abstract
Method and device for installing cables in ducts using a pressurized fluid, a fluid being applied which, under the operational pressure and operational temperature applied during the installation, is in a liquid state and which, under the ambient pressure and ambient temperature prevailing at the location of the installation, is in gaseous state. By applying such a fluid, the advantages of installing a cable using a liquid flow and using a gas flow may be combined, while the drawbacks respectively associated therewith are obviated.
Claims5
A device for installing a cable in ducts, using a fluid, wherein the fluid at operational pressure and operational temperature applied at installation of the duct is in a liquid state and at an ambient pressure ambient temperature prevailing at a location of the installation is in a gaseous state, the device comprising:
- means to couple a flow of the fluid to an input end of the duct in order to fill the duct with the fluid;
- means to introduce the cable into the input end of the duct, and
- operating means to pressurize the fluid to lower an actual temperature of the fluid in order to bring the fluid to the liquid state, said operating means comprising a stock vessel, or a compressor or cooling means, which compressor or cooling means are coupled to the input end of the duct.
Dependencies are inferred from the claim text.