Mining cable with water-blocking isolation layer
An isolation layer and water-blocking technology, applied in the direction of power cables with shielding layer/conductive layer, bendable cables, insulated cables, etc., can solve the problem of cracking of cable sheath, unsuitable construction and laying in winter, unusable cables, etc. problems, achieve excellent cold resistance and improve radial water resistance
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[0010] Such as figure 1 As shown, a coal mine cable with a water-blocking isolation layer has a cross-sectional area of 240mm from the inside to the outside 2 The core 1, the conductor shielding layer 2, the insulating layer 3, the insulating shielding layer, the wrapping tape 7 and the outer sheath 11 are formed. The insulating layer 3 is made of cross-linked polyethylene material, and its thickness is not less than 23mm. The insulating shielding layer is composed of a non-metal semiconducting layer 4 and a metal layer 5 from the inside to the outside, wherein the non-metal semiconducting layer 4 is made of extruded cross-linking and bonding semiconducting material, and the metal layer 5 is made of copper. For wire shielding, the surface of the copper wire shielding is provided with reverse-wrapped copper wire or copper tape 6, and the average gap between the windings in the copper wire shielding should not be greater than 4mm.
[0011] A water blocking isolation layer 8 is pr...
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