Safety plant for a stretching machine (11) of the brake type comprising a negative brake (22) which can be selectively activated and de-activated so as to constrain and respectively allow the rotation of at least one capstan (12) which supports cables, a pumping device (24) connected to the negative brake (22) and configured to de-activate the latter during the normal use of the stretching machine (11), putting a working fluid under pressure, pressure energy accumulation means (32) of said working fluid, and a maximum pressure valve (18) configured to regulate the working pressure of a hydraulic motor (13) for controlling the twisting torque applied to the capstan (12). The plant also comprises a motorized drive device (19) connected to the maximum pressure valve (18) and provided to selectively regulate the action of the latter on the hydraulic motor (13), even in a breakdown condition of at least the pumping device (24), in order to maintain the working pressure of the hydraulic motor (13) and to maintain the negative brake (22) de-activated by the intervention of the pressure energy accumulation means (32).
Safety plant for a cable stretching machine, corresponding method and stretching machine using said plant
07.10.2015
Patent
Elektronische Ressource
Englisch
IPC: | H02G INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES , Verlegen oder Installieren elektrischer Kabel oder Leitungen, Verlegen oder Installieren kombinierter optischer und elektrischer Kabel oder Leitungen / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES |
Europäisches Patentamt | 2017
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