Safety plant for a cable stretching machine, corresponding method and stretching machine using said plant
A stretching machine and equipment technology, applied in the direction of overhead line/cable equipment, mechanical equipment, brake actuators, etc., can solve problems such as damage, loss of cable tension, uncoordinated stop, etc.
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[0043] The invention relates to a safety device 10 for a stretching machine 11 of a cable ( figure 1 ), this cable is wound on the corresponding capstan, in this case a pair of capstans.
[0044] The stretching machine 11 is of the type having a braking function and configured to control the tension with which the cable is unwound from the pair of winches.
[0045] The stretching machine 11 comprises at least one hydraulic motor 13 configured to be drawn in rotation by the pair of winches 12, operating as a hydraulic pump to keep the cable under tension during normal stretching operations.
[0046] The hydraulic motor 13 is connected to a hydraulic circuit comprising a suction branch 14 through which working fluid is drawn from a tank 17 , and a delivery branch 16 or pipe connected to a maximum pressure valve 18 . The maximum pressure valve 18 is configured to maintain a substantially constant pressure in the delivery branch 16 and subsequently in the hydraulic motor 13 even ...
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