The cold shrinkable cable accessories are made of superior liquid silicone rubber to complete the cold shrinkable technology terminal and intermediate joint, which is convenient, safe and of high quality. This product is widely used in electric power, petrochemical industry, metallurgy, railway, port and construction. Generally, the elastomer materials (commonly used are silicone rubber and ethylene propylene rubber) are used for injection molding in the factory, and then the components of various cable accessories are formed by expanding and lining with plastic screw supports. When the cold shrink terminal head is installed on site, these pre expansion parts shall be sleeved at the end or joint of the treated cable, and the plastic spiral strips (supports) supported inside shall be drawn out. The shrinkage of the cold shrink tube shall be used to make the cold shrink tube completely cling to the cable. At the same time, the semiconductor self-adhesive tape shall be used to seal the port to make it have good insulation, waterproof and moisture-proof effect, and compact on the cable insulation Cable accessories.
1. The heat shrinkable cable accessories need to be heated by fire, and there is a risk that the internal layers of the accessories will be separated when the heat shrinkable cable accessories are bent or moved; the cold shrinkable cable accessories do not need to be heated by fire, and the internal interface characteristics are ensured by the elastic pressing force, and the fire heating is not used in the operation, which not only avoids the trouble of heating by fire, but also eliminates the fire hazard.
2. Small size, convenient operation, agility, no need of special tools, no open fire, no heating during installation, safe and reliable, time-saving and labor-saving. Only when the core is removed, the elastomer will contract rapidly and be tightly clamped to the required installation position.
3. It has wide application range, dirt resistance, aging resistance, corrosion resistance, and can be used for a long time in harsh environment.
4. It has stable performance and long service life. The sealant is used to bond all connecting parts to achieve overall sealing. It has good insulation, waterproof and moisture-proof effect, and prevents and avoids operation accidents caused by atmospheric environment.
1. Due to one more expansion process in the production process and the expansion and contraction characteristics required, the production cost of cold shrinkable cable accessories is higher.
2. The storage period is short, generally from half a year to two years. The cold shrinkable cable accessories are in the state of high tension, so it is necessary to ensure that there should be no significant long-term deformation or elastic stress relaxation during the storage period, or the device cannot ensure that there is enough elastic compression force on the cable, so as to ensure the tightness.
3. The installation of cold shrinkable cable accessories requires higher requirements for the installation workers and more complicated installation, which requires certain training.
Conclusion: compared with the cold shrink cable accessories, the disadvantages are all small problems, as long as attention is paid, its advantages are many. The insulation part and stress part of the cold shrinkable cable accessories are prefabricated into a whole, pre expanded on the extractable core rope, the core rope is adjusted during installation, and the cold shrinkable cable accessories are shrunk on the cable insulation surface. Without the use of heating tools, the gap between the heat shrinkable material and the cable body caused by heat expansion and cold shrinkage is overcome when the heat shrinkable material is running in the cable, so it has been more and more widely used.
Now, more and more projects begin to use the cold shrinkable cable accessories to replace the heat shrinkable cable accessories.
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