Application and prospect exploration of heat shrinkable cable accessories
【Abstract】In recent years, the popularity of cold shrinkable cable accessories seems to have seized most of the market of heat shrinkable cables. Some people even think that with the increasing maturity of cold shrinkage technology, there will be complete cold shrinkage cable accessories. In place of heat shrink attachments. In fact, this phenomenon is impossible. |
In recent years, the popularity of cold-shrinkable cable accessories seems to have seized most of the market of heat-shrinkable cable accessories. Some people even think that with the maturity of cold-shrinkable technology, there will be cold-shrinkable cable accessories completely replacing heat-shrinkable cable accessories. the case of attachments. In fact, this phenomenon is impossible.
With the continuous expansion of the national grid to meet the increasingly tight electricity demand, the mature development of high-speed rail technology, etc., all make the demand for heat shrinkable cable accessories become larger and larger. At present, there are many kinds of cable accessories used in 10KV power transmission and distribution system. According to the usage of our factory, most of them are divided into: shell pouring type (cast iron, aluminum alloy shell, pouring cable oil or asphalt). Dry pack type and heat shrinkable type. In recent years, with the advancement of technology, heat shrinkable cable accessories have been used in production, which overcomes many disadvantages of the previous cable accessories and has obvious advantages.
Heat shrinkage principle of heat shrinkable cable accessories - physical state of polymer:
Organic compounds are actually hydrocarbons and their organisms. The long-chain macromolecules such as polyethylene, which are obtained from low-molecular organic matter as raw materials, are called high polymers through polymerization. Polymer molecules usually exhibit a regular coil shape. Due to the length of the molecular chain, the motion states of the chains and segments are different, and the polymer has three different aggregation states. Under the action of a certain external force, the relationship between the shape and temperature of the polymer is shown in the product introduction of cold shrinkable cable accessories.
Although the physical state of the polymer has a certain stability, because the general polymer is a linear structure, it is fusible and soluble under the action of heat and solvent, and it cannot be used as a cable accessory material. Therefore, it must be modified. The linear structure of the polymer gives it better stability.
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