1.Overview：

Rope saw machine is a mountain equipment, the traditional rope saw machine is hydraulic drive, hydraulic pump station produces hydraulic drive motor rotation, the motor drives the drive wheel to rotate, the drive wheel to drive the rope by the direction of the steering control of the rope high speed rotation, to achieve the purpose of cutting and dismantling the reinforced concrete.

The rope saw machine can realize various cutting of thick concrete, which can ensure the static cutting and removal of bridge, pier, wharf platform and underwater concrete pile to ensure that the original structure is not damaged.

Use FGI FD100 low voltage frequency inverter products to upgrade the rope saw equipment, comprehensively improve the performance and automation level of the equipment.

2.Implementation plans

The saw machine is driven by two motors, the big is the saw rope motor drives the saw rope, the saw rope sleeve runs at high speed on the mountain that has been cut out the gap, and the small is the walking motor, which drives the sawing machine along the direction of the stone is cut back. The moving speed of the sawing machine is adjusted in real time according to the cutting load. It is necessary not only to avoid overloading or breaking the sawing rope caused by moving too fast, but also to avoid moving too slowly and causing the sawing rope relaxing and twisting the sawing saw rope.

Therefore, the rope saw machine should not only ensure the uniform load and the stable tension of the saw rope during the cutting, but also improve the cutting efficiency, the actual mine shape is irregular, the cross section size is different, and the movement speed of the saw machine should be adjusted in real time.

The saw rope motor with large power and the walking motor with small power are controlled by two frequency inverters respectively. If the current is larger when the cutting texture is hard stone, the saw bed will reduce the walking speed until shutdown.

The saw rope motor speed is given by the external potentiometer, binding its frequency inverter AO1 output to the motor current setting. The frequency inverter of the walking motor calculates PID by collecting the signal given by the saw rope frequency inverter AO1, and the output frequency controls the speed of the walking motor, as shown in the figure below. The speed of the AI1 of the walking motor is given as the PID, and the AI2 signal is feedback, and the output speed of the walking motor is adjusted by PID to ensure the current stability of the saw rope motor current.

3. Application advantages

FD100 low voltage frequency inverter accurately displays the current of the saw rope motor through analog quantity.

FD100 low voltage frequency inverter high degree of automation walking motor PID control.

FD100 low voltage frequency inverter output torque can be adjusted to output.

The load control of FD100 low voltage frequency inverter is stable and accurate, and the movement speed can be adjusted according to the change of cutting surface, and the system fluctuation is small.

The current transformer and analog input/output module are easy to be damaged in the harsh environment such as mine water and dust, so as to reduce the failure rate.