All-dielectric central tube type optical cable

The invention relates to an all-dielectric central tube type optical cable, comprising a central tube, an optical fiber unit, optical fiber ointment, a reinforced layer and an outer sheath, wherein the optical fiber unit is arranged in the central tube; the optical fiber ointment is filled in a gap between the optical fiber unit and the central tube; the outer sheath covers the outer surface of the central tube; and the reinforced layer is arranged between the central tube and the outer sheath. The all-dielectric central tube type optical cable is characterized in that the reinforced layer is a glass fiber reinforced plastic band or glass fiber yarn. The all-dielectric central tube type optical cable also comprises at least one pair of reinforcements which are arranged in the outer sheath along the length direction of the optical fiber unit. Because the reinforced layer adopts the glass fiber reinforced plastic band or the glass fiber yarn, and at least one pair of reinforcements made of dielectric materials are arranged in the outer sheath, the optical cable is completely made of dielectric materials, thus the optical cable has better effect on resistance to the influence of external electrical leakage environments, electromagnetic induction prevention and lightening protection, has the advantages of high strength and high optical fiber intensity, is suitable for strong lightning areas, is laid in the same groove with electric power cables, and is accessed into cells for use.