Crane cables are special cables designed specifically for crane equipment. Their core function is to provide stable and reliable power transmission and signal control for the electric system, control system, and safety devices of the crane. This type of cable needs to have high flexibility, bending resistance, tensile strength, high strength, wear resistance, oil resistance, and environmental aging resistance to adapt to the frequent movement of cranes under complex working conditions, mechanical stress, and harsh environments (such as humidity, high temperature, dust, etc.).

Technical characteristics and structure of crane cable

1.Conductor material: Typically, a multi strand thin copper wire twisted structure is used to enhance flexibility and fatigue resistance, avoiding fracture caused by frequent bending.

2.Insulation layer: High strength insulation material TPEE is used, with a common voltage resistance level of 600V/1000V, to ensure insulation performance is maintained even in the event of overload or short circuit.

3.Sheath design: The outer sheath is often made of nitrile rubber or polyurethane material, which has oil resistance, acid and alkali resistance, UV resistance, and tear resistance. Some models also add flame retardants to enhance fire safety.

4.Flat structure: Crane cables are often designed in a flat shape, which facilitates neat arrangement in drums or drag chains, reduces space occupation, and reduces stress concentration during bending.

5.Tensile element: Internally embedded with aramid fibers or steel wire ropes and other tensile materials to enhance the cable’s tensile resistance and prevent breakage due to gravity or mechanical pulling.

Common classification models of crane cables

1.Common power flat cables for cranes/gantry cranes

YVFB/YVFBG: Nitrile sheathed flat cable, optional steel wire reinforcement, 600/1000V, bending life of about 10 million times.

YFFB/YFFBG: Full nitrile insulation+sheath, better oil resistance, with a lifespan of about 15 million cycles, suitable for steel mills/high oil pollution environments.

2.Power round cable (drum cable/long distance drag chain cable/crane towing cable)

YFR/YFRP: High flexibility drum cable, Class 6 ultra soft copper, optional shielding, suitable for small car/tower crane lifting.

PUR drag chain cable: polyurethane sheath, extremely wear-resistant, with a lifespan of about 20 million times, suitable for high-end automated lifting.

Фестонный кабель, also known as Suspension Towing Cable, is a highly flexible and strong tensile special mobile cable designed specifically for crane towing systems (trolley suspension, long stroke lateral movement). Its core features include suspension towing, tensile resistance, repeated bending resistance, and anti torsion, distinguishing it from кабель цепи перетаскивания (with built-in tank chains that can bend back and forth).

Key points for selecting crane cables

● By device type: bridge/portal multi-purpose flat cable; Tower/drum specific round cable for drum (with reinforced tensile strength).

● Select 10 million times PUR sheathed cable based on mobile frequency: high frequency (>500 times/day); Select nitrile flat cable for intermediate frequency.

● According to the environment: choose PUR/nitrile for oil pollution/outdoor use; Select cold resistant formula for low temperature (-40 ℃); Select special sheath for high temperature (+105 ℃).

● Tensile strengthening: For suspension lengths>40m or speeds>2m/s, steel wire/aramid reinforced полиуретановый кабель must be selected.

Installation and maintenance of crane cables

Flat cable laying to avoid twisting; The reel cables should be arranged neatly and have moderate tension. Regularly check whether the outer sheath of the crane cable is cracked, whether the insulation layer is aged, and whether the conductor is exposed. If cables are found to be stacked or tangled at the drum, they should be adjusted in a timely manner to avoid local overheating or mechanical damage.