CABLE TENSIONING SYSTEM AND METHOD OF OPERATION

摘要

A concrete reinforcement cable tensioning system is variably adjustable to apply different crimping for different sized cables. The system includes a concrete reinforcement cable tensioner having a first actuator for tensioning a cable extending through a concrete structure and a second actuator for crimping a grommet onto the cable. A first hydraulic line is in fluiti communication with the first actuator and selectively provides pressurized hydraulic fluiti to the first actuator. A second hydraulic line is in fluiti communication with the second actuator and selectively provides pressurized hydraulic fluiti to the second actuator. A normally closed pilot operateti sequencing valve is disposed in the first hydraulic fine, and has a pilot fine in fluiti communication with the second hydraulic line for sensing a pressure in the second hydraulic fine, wherein the sequencing valve opens to exhaust hydraulic fluiti from the first actuator upon the pressure in the second hydraulic fine reaching a predetermined pressure. The predetermined pressure is variably changeable to accommodate different pressures required to crimp gromrnets on different sizes of cable.