DOUBLE-LAYER STRANDED ALL-DRY TYPE OPTICAL CABLE

摘要

A double-layer stranded all-dry type optical cable comprises a central strengthening component, a double-layer stranded cable core, a water blocking tape (5), reinforcing yarn (6), and an outer sheath layer (7). The central strengthening component is externally wound with water blocking yarn (4); the double-layer stranded cable core is formed through SZ stranding of inner and outer all-dry type loose sleeve tubes (2), and comprises three structures: a structure of six tubes at the inner layer and twelve tubes at the outer layer, a structure of seven tubes at the inner layer and thirteen tubes at the outer layer, and a structure of nine tubes at the inner layer and fifteen tubes at the outer layer; each of the loose sleeve tubes (2) comprises twelve optical fibers (1) and 1 to 2 pieces of water blocking yarn (4) and contains no ointment; the water blocking tape (5) is wrapped between the inner and outer all-dry type loose sleeve tubes (2) and outside the double-layer stranded cable core; the surface of the water blocking tape (5) outside the double-layer stranded cable core is wound with the reinforcing yarn (6); a tearing rope (8) is provided on the reinforcing yarn (6); and the outer sheath layer (7) is provided outside the reinforcing yarn (6). The entire optical cable is in an all-dry type structure