The optical cable splice box is an indispensable and important component in the optical cable line. It plays a role in wiring and protecting the optical fiber joints in the optical cable line, and can also protect the safety of equipment and staff in the communication room in thunderstorm weather. Judging from the current application situation, most of the failures of communication lines (except for the obvious failures of optical cables, such as man-made construction damage or natural disasters) are not on the optical cables, and most of the failures occur in the optical cable splice boxes, such as splice boxes. Water, damage to the box body, etc. lead to bare optical fibers or long-term immersion in water causes line failures.
With the continuous innovation of splice closure technology and the improvement of technology, the common sealing methods in the domestic market can be roughly classified into two categories: traditional optical cable splice closures and new optical cable splice closures.
Traditional double-ended optical cable splice closures are encapsulated with non-vulcanized tapes, strips, and glue. Fasten the box body with bolts, and fully fill the gap between the box body with non-vulcanized tape, rubber strip, and cement to achieve the sealing effect. Operators need to have certain operating experience. If there is no need for expansion and maintenance during network use, the sealing performance can be guaranteed for a long time. However, the disadvantages of the traditional splice box are that it is difficult to re-open, and the sealant after extrusion is very viscous. It takes a lot of manpower to open and re-seal, and there will be some risks to the safety of the optical fibers fused in the splice box. Network construction and higher maintenance costs.
new type of splice closure uses silicone sealing strips, screw-in terminals, bolts or hasps to encapsulate optical cable splice closures. Generally, the sealing material around the box body is made of silicone rubber, which can be disassembled repeatedly and does not need to replace the sealing rubber ring; the box body can be fastened by bolts, buckles, or a combination of the two; the cable inlet is mostly screwed in mechanically type sealing method. The operation is relatively simple, and the technical requirements for packaging personnel are not very high. During maintenance and expansion, the efficiency of packaging is greatly improved, and manpower and material resources are saved. From Table 1, we can see the overall difference between traditional and new optical cable splice closures.