Non-cable-end-portion access type cable sealing structure of cable connector box

Abstract

The invention discloses a non-cable-end-portion access type cable sealing structure of a cable connector box. The cable sealing structure comprises a box body, a sealing body, a sealing member and a pressing locking member. A through hole through which a U-shaped end of an optical cable passes is formed in the box body; two inner cavities through which the optical cable passes are formed in the sealing body; two bosses through which the optical cable passes are arranged at the sealing member and are arranged in the inner cavities; the sealing member is arranged between the box body and the sealing body; and the pressing locking member is fixed at the sealing body. According to the invention, the influence on the sealing body by the sealing member due to the temperature change is reduced byreducing the size of the cable mouth sealing member. The cable sealing member is disposed in the sealing body to reduce the sealing difficulty between the box sealing member and the box body, so thatthe sealing performance becomes reliable.

Description

technical field [0001] The invention belongs to the technical field of optical communication equipment, and relates to an optical cable sealing structure of a non-optical cable end access type in an optical cable joint box. Background technique [0002] The optical cable splice box mainly protects the connection between the optical cable and the optical cable on the optical fiber network. There are two ways to connect the optical cables: straight-through and divergent. . When the non-end part of the optical cable is connected to the splice box, the access part of the optical cable needs to be bent into a U shape, and the U-shaped part is inserted into the cable splice box as a whole, and fixed and sealed. At the same time, the minimum bending half of the conventional optical fiber core The width of the optical cable port must be greater than 60 mm. Most of the existing sealing structures for the U-shaped part of the optical cable use heat-shrinkable seals or conventional m...

AI Technical Summary

Problems solved by technology

Most of the existing sealing structures for the U-shaped part of the optical cable use heat-shrinkable seals or conventional mechanical extrusion seals. Although the heat-shrinkable seals have relatively stable sealing performance, they need to carry heating equipment during construction, which brings inconvenience to field construction; while conventional Mechanical extrusion sealing, through an integral elastic sealing part, squeezes and seals the two branches of the U-shaped part of the optical cable at the same time, the sealing performance is poor, and the main reasons for the failure to meet the performance requirements are as follows: When optical cables with different diameters are used, the seals are bulky, and the resistance when extruding the seals is large. The thermal expansion coefficient of the existing vulcanized rubber is relatively large, and the compression permanent deformation is relatively large. It will be reduced, and the sealing part of the optical cable is prone to air leakage

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