what is a cable pulley?

September 29, 2022

The cable pulley is an essential tool for the tension pay-off construction of high-voltage overhead transmission lines. In the tension pay-off process, first select the appropriate cable pulley according to the section size and weight of the wire to be laid out and the distance and height difference between the base poles and towers in the construction line segment. Suspend 1-2 sets of cable pulley, use the tractor to pull the guide rope, and then pull the pull rope connected with the wire through the walking board, so that the wire can pass through the cable pulley block smoothly, and the wire can be placed on each base tower in the construction line section. 's exhibition. Therefore, the cable pulley provides a support and a deployment channel for the wire, which plays an important role in protecting the wire and improving the efficiency of the pay-off construction.

The currently widely used traditional cable pulley can be divided into single-wheel cable pulley, three-wheel cable pulley, five-wheel cable pulley, seven-wheel cable pulley and nine-wheel cable pulley according to the number of wheels, which can satisfy The need for one-time deployment of single wire, double-split wire, four-split wire, six-split wire and eight-split wire. For cable pulley with more than one wheel, such as three-wheel and five-wheel cable pulley, the middle pulley is a wire rope pulley, which is used to pass the guide rope and the traction rope. The single-wheel cable pulley, guide rope, traction rope and wire all pass through the guide pulley.

508mm Large diameter stringing block-3