Traction chain cable, also known as flexible cable for traction chains, soft cable for traction chains, or special cable for traction chains, is a type of cable specifically designed for use in dynamic environments. The following is a detailed introduction:
Structural Features
- Tensile Center: In the center of the cable, within the space of the cross - section area of each core wire according to the number of cores, a real centerline filler is set up as much as possible. This effectively protects the stranded wire structure and prevents the stranded wires from moving into the central area of the cable.
- Conductor Structure: The most flexible conductor is selected. Generally, the thinner the conductor, the better the flexibility of the cable. However, if it is too thin, the cable will be prone to entanglement. Through a series of long - term experiments, the optimal diameter, length, and shielding combination of a single wire are determined to achieve the best tensile capacity.
- Core Insulation: The insulating material is made of high - pressure - formed PVC or TPE materials. These materials should not stick to each other and need to support each single wire. This kind of material has proven its reliability in the long - term application of traction chain cables.
- Stranding: The stranding structure is wound around a stable tensile center with the optimal lay length. Starting from 12 core wires, the bunch - stranding method is adopted.
- Inner Sheath: The inner sheath is extruded in an armored - style manner. It replaces inexpensive wool materials, fillers, or accessory fillers to ensure that the stranded wire structure will not be scattered.
- Shielding: The shielding layer is tightly braided outside the inner sheath at an optimized braiding angle. The tightly braided shielding layer has the function of resisting torsion and can prevent the decline of EMC protection ability caused by the breakage of the shielding.
- Outer Sheath: It is made of different improved materials and has functions such as UV resistance, low - temperature resistance, and oil resistance. The common features are high wear resistance and non - adhesion to anything. At the same time, it has high flexibility and support functions and is formed under high pressure.
Performance Advantages
- Good Flexibility: It is made of special polymer materials and can adapt to various bending and twisting environments. For example, it can bend frequently with the robotic arm on the automated production line.
- Strong Bending Resistance: It can withstand frequent bending and movement without being easily damaged. For instance, in CNC machine tools, it can endure the repeated bending of the moving parts of the machine.
- Wear - Resistant: The surface is made of wear - resistant materials. During the long - term use and frequent moving and friction process, it can maintain stable transmission performance and reduce downtime and maintenance caused by wear.
- Tensile - Resistant: It can bear a certain amount of tension. For example, in cranes, it can withstand the tension as the boom expands and contracts without breaking.
- Corrosion - Resistant: It usually has excellent corrosion resistance and is suitable for corrosive environments such as the chemical and petroleum industries.
- Fast Transmission Speed: It can meet the power and signal transmission requirements of various high - speed equipment and improve production efficiency.
- High Safety: It is made of low - smoke and halogen - free materials and has good flame - retardant performance to prevent safety accidents such as fires.
Application Fields
- Industrial Electronic Systems: It connects sensors, actuators, and controllers on the production line to achieve automated control.
- Warehousing Equipment: It provides power and signal transmission for handling robots to achieve efficient material handling.
- Robots: It ensures the normal operation of robots in complex environments, such as the cable of the welding robot arm.
- Fire - Fighting Systems: It transmits power and signals to ensure the normal operation of fire - fighting equipment.
- Cranes: It transmits power and control signals for various types of crane equipment.
- CNC Machine Tools: It protects the internal cables and pipelines of machine tools and prevents cable damage caused by the movement of machine tools.
- Metallurgical Industry: It can stably transmit power and signals in harsh metallurgical environments.
Common Models
- TRVV: Copper - core nitrile - PVC insulated, nitrile - PVC sheathed traction chain cable.
- TRVVP: Copper - core nitrile - PVC insulated, nitrile - PVC sheathed, soft - sheathed tinned copper wire mesh braided shielded traction chain cable.
- TRVVSP: Copper - core nitrile - PVC insulated, nitrile - PVC sheathed twisted - pair overall shielded traction chain cable.
Differences from Ordinary Cables
Ordinary flexible cables are used for power transmission or signal transmission in fixed positions, while traction chain cables are specifically designed for movement in traction chains. They have high flexibility and wear resistance and can prevent cable entanglement, wear, pulling off, hanging, and scattering.