Drag chain cable, also known as drag cable or tank chain cable. Its basic definition is to prevent cable entanglement, wear, pulling off, hanging, and scattering. Cables are often placed in cable drag chains to protect them, and they can also move back and forth with the drag chains. This type of high flexibility specialized cable can move back and forth with the drag chains without being easily worn out.
The structure of the drag chain cable is:
1. Tensile center
As much as possible, there should be a true centerline filling in the center of the cable based on the number of cores and the space where each core wire intersects (instead of using some filling materials or waste plastic made garbage core wires as usual). This method can effectively protect the stranded wire structure and prevent the stranded wire from floating to the center area of the cable.
2. Conductor structure
Cables should choose the most flexible conductor. Generally speaking, the thinner the conductor, the better the flexibility of the cable. However, if the conductor is too thin, it can cause cable entanglement. A series of long-term experiments have provided the optimal diameter, length, and nodal shielding combination for a single wire, which has the best tensile strength.
3. Core wire insulation
The insulation materials inside the cable cannot stick to each other. And the insulation layer also needs to support each single strand of wire. Therefore, its reliability can only be confirmed in the application process of PVC or TPE materials formed under high pressure for millions of meters of cables in drag chains.
4. Twisted wire
The stranded wire structure must be wound around a stable tensile center at the optimal intersection pitch. However, due to the application of insulation materials, the stranded wire structure should be designed according to the motion state, starting from 12 core wires, and therefore should be twisted into bundles.
5. Filler or accessory filler
The inner sheath of the armor is extruded to replace cheap wool materials, fillers or accessory fillers. This method can ensure that the stranded wire structure will not be scattered.
6. Braided shielding
The tightly woven inner sheath and loose woven tape will reduce the EMC protection ability, and the shielding layer will quickly fail due to the breakage of the shielding. The tightly woven shielding layer also has the function of resisting torsion.
7. High performance outer sheath
The outer sheath made of different improved materials has different functions, including UV resistance, low temperature resistance, oil resistance, and cost optimization. But all of these outer sheaths have one thing in common, high wear resistance and will not adhere to anything. The outer sheath must be highly flexible but also have a supporting function, of course, it should be high-pressure formed.