Low-smoke halogen-free cable for shield

Abstract

The invention discloses a low-smoke halogen-free cable for a shield, and relates to the technical field of a cable. The low-smoke halogen-free cable comprises a first sheath, insulation power cores, a ground core and a control core, wherein the each insulation power core is formed by successively arranging a metal shielding layer, an ethylene propylene terpolymer rubber insulation layer and a type-six tin-coated copper conductor on an aramid fiber core from the outside to the inside; the ground core is formed by extruding a type-six tin-coated copper conductor by a conductor semiconducting shielding layer; the control core is formed by extruding control core groups by a second sheath; each control core group is formed by successively extruding an aramid fiber core by a conductor semiconducting shielding layer and a type-six tin-coated copper conductor; the three insulation power cores and the one control core are extruded by a water-blocking wrapping tape to form a cable core; the ground wire is arranged in the middle of the cable core, and a water-blocking yarn is arranged in a gap of the cable core; and the water-blocking wrapping tape is externally provided with the second sheath. The cable provided by the invention is softer and has higher tension resistance, has a water-blocking function, is good in tension-resistant and wear-resistant performance, and can satisfy the requirement of the shield for the cable under a complex working condition.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a low-smoke, halogen-free shield machine cable. Background technique [0002] With the advancement of science and technology, the widespread use of a new type of underground tunnel excavation equipment, the shield machine, has driven the extensive demand for shield machine cables. The use environment of shield machine cables is harsh. The cables not only have to be bent and moved frequently, but are also often soaked in gravel and muddy water. During use, the cables not only have to bear the strong mechanical shearing, bending and pulling force generated during the excavation and movement of the shield machine, It is also squeezed by hard objects such as gravel rocks and soaked in muddy water, so the cables are easily damaged. At present, there are very few shield machine cables in the domestic market that are used in shield machine cables and have a long service life of water re...

AI Technical Summary

Problems solved by technology

At present, there are very few shield machine cables in the domestic market that are used for shield machine cables and have a long service life of water resistance, tensile resistance and wear resistance, which cannot meet the huge market demand for shield machine cables.

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