Stepped sealing structure of optical cable connector box

Abstract

The invention discloses a stepped sealing structure of an optical cable connector box. The stepped sealing structure is characterized in that the stepped sealing structure comprises an upper box bodyand a lower box body, the optical cable connector box is provided with an optical cable embedding hole used for allowing an optical cable to penetrate through, the optical cable embedding hole is provided with a retaining ring, an elastic sealing ring and an extrusion member arranged in sequence from the inside to the outside, the retaining ring, the elastic sealing ring and the extrusion member each comprise a penetrating hole used for allowing the optical cable to penetrate through, the retaining ring is fixed in the inner end of the optical cable embedding hole, an end portion of the elastic sealing ring is abutted against the retaining ring, and the retaining ring is formed by a hard inner core and an elastic sealing peripheral member arranged at the periphery of the hard inner core. According to the stepped sealing structure, an area of the optical cable embedding hole of the optical cable connector box adopts stepped sealing, the sealing of the optical cable embedding hole is realized through the elastic sealing ring, the sealing between the upper box body and the lower box body is realized through the elastic sealing peripheral member of the retaining ring, and the sealing structure is more reliable.

Description

technical field [0001] The invention relates to a step-by-step sealing structure of an optical cable joint box. Background technique [0002] The optical cable splice box is used for the connection and protection between optical cables on the optical fiber network. In the prior art, in order to meet the needs of the straight-through and divergent connection functions of the optical cable splice box, the upper and lower covers of the box body and the sealing strips must be designed as a Hafur-type sealing structure that can be opened and fixed at the top and bottom. The optical cable buried hole of the existing optical cable splice box is usually sealed by a soft sealing material such as silicone rubber, so as to ensure good airtightness and waterproof performance, thereby avoiding moisture erosion. Most of the existing optical cable splice boxes are sealed with non-vulcanized rubber, and non-vulcanized rubber needs to be added again for repeated use, which is costly and inc...

AI Technical Summary

Problems solved by technology

Most of the existing optical cable splice boxes are sealed with non-vulcanized rubber, and non-vulcanized rubber needs to be added again for repeated use. The cost of repeated use is high and it is inconvenient to use

The fiber optic cable splice box sealed with vulcanized rubber is easy to reuse, but the temperature cycle performance cannot meet the requirements (national standard: Y / DT814-2007)

The failure to meet the performance requirements mainly has the following reasons: the vulcanized rubber seal seals the box body and the cable at the same time, which requires high construction operations and poor stability; the thermal expansion coefficient of the existing vulcanized rubber is relatively large, and the compression set is relatively large. Large, after the low temperature test, the volume will shrink accordingly, and the rebound performance will decrease at low temperature, which is an important reason for its poor sealing performance

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