External force hazards, insulation, wetting, chemical corrosion, long-term overload work and cable joint failure will cause the aging and failure of high-flexible towline cables. Let me introduce in detail the reasons for the aging and failure of high-flexible towline cables and how to avoid towline cables. Broken core:
1. What are the reasons for the aging and failure of high-flexible towline cables:
1. External force harm
According to the analysis of work in recent years, many cable defects are caused by mechanical hazards. For example: cable laying equipment is not standard construction, which simply constitutes mechanical damage; earthwork construction also simply damages the working cable. Sometimes, assuming that the damage is not severe, it takes months or even years for the damaged area to be completely damaged. Sometimes severe damage may lead to short-circuit defects, which directly affect the safe production of electrical appliances.
2, insulation, wetting
This is also very common, usually in the cable joints in straight pipes or row pipes. For example, assuming that the cable joint does not meet the requirements, and the joint is manufactured in a humid climate, the joint can be made into water or mixed with water vapor, and under the action of an electric field, the length of time r constitutes a water branch to gradually Damage the insulation strength of the cable and cause shortcomings.
3, chemical corrosion
The cable is directly buried in the acid-base area, which usually causes the cable armor, the lead wire or the outer sheath to be corroded. The protective layer is chemically corroded or electrolytically corroded for a long time, which causes the protective layer to fail and decrease the insulation. Disadvantages of the cable. The cable corrosion of this equipment is very severe.
4, long-term overload work
During overload operation, due to the thermal effect of the current, when the load current passes through the cable, it will inevitably cause the wire to heat up. At the same time, the skin effect of the charge, the eddy current loss and the dielectric loss of the steel armor will also generate additional heat, and then the temperature of the cable will advance. When overloading for a long time, over-temperature will accelerate the aging of the insulation and even damage the insulation. Especially in the hot summer, the temperature rise of the cable will often lead to the initial breakdown of the cable insulation, so the cable has more shortcomings in the summer.
Highly flexible towline cable
5, the cable connector fails
Flexible drag chain cable joints are the weakest link in the cable line. The cable joints explode and fail due to the direct shortcomings of the personnel (poor construction). The decrease in insulation degree of the cable will also constitute the high temperature and high temperature of the cable, and the high temperature and high temperature of the cable.
2. How to prevent the high flexible drag chain cable from wearing out:
1. Use of cable sheath
The method of cable protection is well known to many people. Install a winding tube sheath in a relatively simple and worn area to wrap the cable. It is the most direct way to avoid the wear between the drag chain and the cable. This method is simple and convenient. However, long time will not help. The winding tube needs to be replaced regularly. From a long-term point of view, this method is actually not simple.
2, use high-strength drag chains
Since the wear between the drag chain and the cable cannot be eradicated, the quality of the drag chain should be upgraded. The high-strength drag chain has relatively little wear between the cable and the cable, and the appearance is also free of burrs. Harm to the cable, the high-strength drag chain itself is extremely stable, generally not easy to be damaged, and has a longer service life.