Introduction to the sealing performance of cold shrinkable cable accessories

The cold-shrinkable cable accessory is actually an elastic cable accessory, that is to say, the elasticity of the liquid or solid silicone rubber itself is expanded in advance in the factory to put in the plastic and the support bar. Therefore, the fully cold-shrinkable accessories are the best choice for use in areas with large temperature differences and large weather conditions.

     At present, there are usually two methods of sealing: one is the method of potting with asphalt or epoxy resin. This method is complicated in process, not easy to control, and is not conducive to maintenance; another new method is also a professional at home and abroad. The manufacturer's preferred method is to use a high-elastic sealant, which is simple in process, reliable in function, convenient in maintenance and installation, and these unique advantages also make it the mainstream of use. Since the quality and function of the sealant directly affect the sealing function of the joint, choose a glue that can firmly adhere to the surface of the cable body and the surface of the accessory material, and can also be content in different temperature changes. The glue that can be used is very important.

      Because most of the cold-shrinkable cable accessories are installed outdoors, directly buried, etc., waterproof and moisture-proof become one of the hubs to ensure the safe operation of the cold-shrinkable cable accessories, and its sealing function and method must also be considered. This kind of technology is cold shrinking technology, and this kind of accessory is cold shrinking cable accessory. Therefore, this kind of cold shrinking accessory has good "elasticity" and can avoid the thermal expansion and contraction of the cable due to the atmospheric environment and the load of the cable during operation. Using this new method, the first thing is to consider the function of the sealant. Go to the designated position at the scene and remove the support bar to make it shrink naturally.

冷缩电缆附件的密封性能

冷缩电缆附件实际上就是弹性电缆附件，也就是说利用液体或固体硅橡胶本身的弹性在工厂预先扩张好放入塑料及支撑条。故全冷缩的附件用于温差大、受天气环境影响大的地域使用是最佳的选择。

    目前密封的方法通常有两种：一种是用沥青或环氧树脂灌封的方法，这种方法工艺复杂，不好控制,也不利于维护；另一种新的方法也是目前海内、国外专业厂家首选的方法，就是使用高弹性的密封胶，其工艺简朴、机能可靠、维护安装利便，这些独特长处也使之成为使用的主流。由于密封胶的质量和机能直接影响到接头的密封机能,选择一种即能和电缆体的表面、还能与附件材料表面黏结都很牢固的胶，同时还能知足在不同的温度变化环境里都能使用的胶是十分重要的。

     因为大部分的冷缩电缆附件都是安装在户外，直埋等环境里，因此防水及防潮就成为确保冷缩电缆附件安全运行的枢纽之一，也就要考虑其密封机能及方法。这种技术就是冷缩技术，这种附件就是冷缩电缆附件，因此，这种冷缩附件具有良好的“弹性”，可以避免因为大气环境、电缆运行中负载高低产生的电缆热胀冷缩。使用这种新方法，首先就是要考虑密封胶的机能。到现场套到指定位置，抽掉支撑条使其天然收缩。

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