DEVICE TO CONTROL WORKING EQUIPMENT OF DRAG-LINE EXCAVATOR Russian patent published in 2006 - IPC E02F9/20 

FIELD: mining, particularly control devices for drag-line excavator.

SUBSTANCE: device comprises sensor and hoist rope tension setting means linked to the first and the second hoist rope regulator inlets correspondingly. The device also has manual hoist engine speed setting means. Outputs of manual hoist engine speed setting means and hoist rope tension regulator are connected to inlets of maximal engine control signal extraction unit, output of the unit is linked to hoist engine speed regulation unit input through hoist rope speed limiting unit controlled by output signal of rope tension sensor. The device is also provided with hoist rope length and tension sensor and setting means, two comparator circuits and controllable keys, manual speed setting means signal and hoist rope setting means signal synchronizer unit. Outputs of hoist rope length sensor and setting means are linked to one comparator circuit input, comparator circuit output is connected to control input of the first key. Outputs of hoist rope tension sensor and setting means are linked to inputs of another comparator circuit connected to control input of the second key. Manual hoist engine speed setting means output are connected to the third input of hoist rope tension regulator through the first and the second controllable keys and hoist rope speed and tension setting means signal synchronizer unit.

EFFECT: increased drag-line excavator output due to reduced time of bucket introduction in solid ground as a result of bucket introduction force increase.

1 dwg