Medium-voltage trailing cable applied to intelligent energy tunneling machine and production process

Abstract

The invention discloses a medium-voltage trailing cable applied to an intelligent energy tunneling machine and a production process. The medium-voltage trailing cable includes a cable core, a side gap filler, a second semiconducting nylon band, a fiber-braided reinforcing layer and a sheath which are distributed sequentially from inside to outside; the cable core comprises three power cable cores and three neutral cable cores; the three neutral cable cores are arranged between every two power core cores and tangent to the power cable cores; gaps among the power cable cores, the neutral cable cores and the second semiconducting nylon band are filled with the side gap filler; and the neutral cable core includes a copper foil wire stranded conductor, neutral cable core copper conductors and a second semiconducting shielding layer which are distributed sequentially from inside to outside. According to the medium-voltage trailing cable applied to the intelligent energy tunneling machine and the production process of the invention, the copper foil wire stranded conductors are added into the neutral cable core copper conductors, KEVLAR fiber lines in the copper foil wires have high strength, high softness, low creep and the like, and therefore, the tensile strength of the neutral cable cores can be effectively improved.

Description

technical field [0001] The invention relates to a medium-voltage drag cable for a smart energy boring machine and a production process. Background technique [0002] With the high-speed growth of domestic urban road transportation, railways, highways, water conservancy and municipal engineering and other construction projects, my country's excavation machinery has also ushered in rapid development. my country's excavation machinery industry has become a key supporting development industry for domestic high-end equipment manufacturing and strategic emerging industries. The roadheader is a machine used to dig a straight underground roadway. When the machine is running, it will generate high mechanical stress and its movements are flexible and complex, so it has high requirements on the drag performance and tensile performance of the cable. Traditional medium-voltage towing cables use steel wire as the reinforcing core, and the neutral cable core is braided outside the power c...

AI Technical Summary

Problems solved by technology

The traditional medium-voltage towing cable uses steel wire as the reinforcing core, and the neutral cable core is braided outside the power cable core. The hardness of the cable is very large, which affects the bending performance of the cable, so it needs to be improved

The neutral cable core is set in the side gap of the power cable core and is tangent to the power cable core, which not only can guide the induced current generated during the operation of the cable into the ground, but also does not increase the outer diameter of the cable. The cable structure is compact and round with high flexibility. However, due to the small outer diameter and low tensile strength of the neutral cable core conductor, it is very easy to break during use and cause the cable to fail. Therefore, copper foil wire is added to the neutral cable core conductor to increase the strength of the conductor.

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