Center-beam-tube full-dry-type indoor and outdoor universal cable

Abstract

The invention relates to a center-beam-tube full-dry-type indoor and outdoor universal cable which includes first dry-type water resistance parts, second dry-type water resistance parts and an outer sheath. The outer sheath is circular and the circle center is the circle center of the outer sheath. The outer sheath wraps an inner sheath and a water resistance layer I is arranged between the outer sheath and the inner sheath. The inner sheath wraps a center bushing. The plurality of dry-type water resistance parts are uniformly laid on the inner wall of the center bushing and the second dry-type water resistance parts are uniformly distributed around the circle center of the outer sheath. A plurality of optical fibers are uniformly arranged at the periphery of the second dry-type water resistance parts and the optical fibers and the first dry-type water resistance parts are arranged to surround the circle center of the outer sheath. A water resistance layer II is also arranged between the inner sheath and the center bushing. A cable opening rope is arranged in the outer sheath. The first dry-type water resistance parts and the second dry-type water resistance parts are made of a rapid expansion yarn and capable of absorbing effectively water and stopping the water from penetration and expansion so that the cable reaches a full-dry state and signal attenuation brought by the optical fibers because of environment factors such as temperature and humidity and the like is reduced.

Description

technical field [0001] The invention relates to an indoor and outdoor universal optical cable, in particular to a central bundle tube full-dry indoor and outdoor universal optical cable, which belongs to the technical field of optical communication transmission. Background technique [0002] Patent No. ZL200520098388 designed an indoor and outdoor dual-purpose optical cable, which includes a cable core and a flame-retardant inner sheath covering the cable core. A water-blocking layer is provided outside the flame-retardant inner sheath. The metal band is covered with an outer sheath. Because the optical cable sleeve contains fiber paste, it not only increases the weight of the optical cable, but also has a certain impact on the connection of the optical fiber and the indoor and outdoor environment after laying. In addition, the optical cable has an aluminum tape armor structure, although the protection of the optical cable is enhanced. At the same time, the weight of the op...

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Problems solved by technology

Because the optical cable sleeve contains fiber paste, it not only increases the weight of the optical cable, but also has a certain impact on the connection of the optical fiber and the indoor and outdoor environment after laying. In addition, the optical cable has an aluminum tape armor structure, although the protection of the optical cable is enhanced. At the same time, the weight of the optical cable is greatly increased, the manufacturing cost is increased, and higher requirements are placed on the laying of the optical cable, and the use is not convenient enough

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