The application of underground cables increases the demand for cable pipeline sealing technology. The traditional sealing method of cable pipeline mostly adopts cement sealing, and uses cement, leak stopper, waterproof cement and other materials to seal and plug the pipeline in sections. The disadvantage is that the waterproof effect between the material and the pipeline will be lost due to thermal expansion and cold shrinkage cracking, and once fixed, it can hardly move. When a fault occurs, it is difficult to carry out. Work, and the cost is high. With the progress of technology, the sealing advantages of inflatable cable pipeline are gradually highlighted, waterproof, anti-theft, anti-rat step in place, and can be operated live during maintenance, which has the characteristics of convenience, safety and reliability. Therefore, as an important part of installation facilities, cable and pipeline sealing is particularly important to protect people's lives and property safety. Therefore, the upgrading and transformation of sealing system needs to go hand in hand with high standards and strict requirements.
Cable is the basic equipment for transmitting electric energy and information. It is known as the "blood vessel" and "nerve" of the national economy. It can be said that the production and life of the city and all walks of life are inseparable from cable. In the past, overhead cable lines were mainly used for cable transmission, which not only deteriorated the urban environment, but also brought troubles and difficulties to urban management. What is more terrible is that Damocles swords always threaten people's lives. On the contrary, cable transmission through underground can not only enhance the reliability of power supply, but also enhance the transmission capacity of the line, eradicate visual pollution and beautify the urban environment, so underground cable becomes the best choice.