Layer-stranding fire-resisting, corrosive-proof and gopher protected communication outdoor cable

Abstract

The layer-stranding fire-resistant anticorrosive gopher protected communication outdoor optical cable includes a cable core made up by stranding several steeves containing one or several optical fibres around a central reinforcement component, filling material received in the described sleeve, water-proof band layer winded round exterior of cable core; filling rubber which is filled between water-prooband layer and cable core and has the buffer function; and most external side fire-resistant layer. The described water-proof band exterior is equipped with a composite aluminium band layer, the aluminium band layer exterior is covered with polyvinyl protecting layer whose exterior is covered with a layer of stainless steel band, the exterior of the stainless steel band is covered with an adhesive layer whose exterior is covered with fire-resistant layer.

Description

Technical field [0001] The invention discloses a stranded outdoor optical fiber cable for fire-retardant, anti-corrosion and anti-rat bite communication, which is an improvement on the existing outdoor optical fiber cable structure for communication. Background technique [0002] With the development of the communication industry, the application of outdoor optical cables for communication has continued to increase, and at the same time, the requirements for communication optical cables that are laid outdoors are also constantly being emphasized. For example: laying fiber optic cables in densely populated areas, oil fields, electricity, harsh geographic environments, special areas, and places with severe rodent and insect pests. Although the factors of preventing high temperature, rust and rodents and insects are more and more aware of, people are paying more and more attention. However, the current outdoor optical cable is still limited to the structure of longitudinally wrapped...

AI Technical Summary

Problems solved by technology

However, the solid state makes the overall softness of the product low, and extreme care must be taken in the construction and laying of optical cables, otherwise the steel or aluminum-plastic composite tape 3 wrapped outside it will be broken due to factors such as bending, and further damage the outer layer. The fracture of the sheath layer 1, moreover, in the installation and welding process of the optical cable, a plurality of loose tubes 7 must be separated from each other, and after using hot melt adhesive, the cable core is combined into a whole, plus The bonding of the hot melt adhesive is very strong, and it is necessary to use special tools to separate the loose tube 7 for welding. In view of this, the hot melt adhesive is very cautious or rarely used or even exempted.

[0005] 2. Steel or aluminum-plastic composite belt 3-series plastic-coated belt or plastic-sprayed belt, once even a small amount of water infiltrates, it will lead to a sudden drop in its anti-corrosion effect, affecting long-term safe use

[0006] 3. Due to the lack of a necessary transition layer between the steel or aluminum-plastic composite tape 3 and the sheath layer 1, no matter the mutual combination effect of the two, or the overall ability of high temperature resistance, corrosion resistance, rodent bite resistance, etc. They are very fragile, and many of the reasons for short-term damage to optical cables are precisely caused by these factors.

This structure is not suitable and cannot be transplanted or used for reference on optical cables. First of all, because the filling layer 6 is composed of cross-wrapped water-blocking ropes 11 and filling layers 10, although it is beneficial to expand when it encounters water, it can block the cable interstitial gap for convenience. Water blocking, but compared with mineral ointment, the effect of water blocking tape is much inferior. In addition, the filling layer 6 of this structure is easy to age, and the life of water blocking effect is very short. Secondly, the focus of this structure is to block water, which cannot inhibit corrosion and rodents and insects. In the actual application of optical cables, more and more people are paying attention to the problem of durability. High temperature, anti-rust, anti-rat and insect chewing problems

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