Dalian Mining Fiber Optic Junction Box: Adapting to High Temperature Underground Environment and Extending Equipment Service Life

Dalian Mining Fiber Optic Junction Box: Adapting to High Temperature Underground Environment and Extending Equipment Service Life

In the high-temperature operation area deep in the mine, the ambient temperature often exceeds 60 ℃. Ordinary fiber optic junction boxes are prone to sealing failure due to material aging. However, high-temperature resistant mining fiber optic junction boxes, with their special design, have become a reliable guarantee for the long-term operation of equipment in high-temperature environments.

The high temperature resistance of this type of Dalian mining fiber optic junction box is first reflected in the precise selection of core materials. The shell is made of modified PPS plastic or cast aluminum alloy, and after high-temperature aging treatment, it can maintain mechanical stability in the range of -40 ℃ to 120 ℃. At a continuous high temperature of 90 ℃, its tensile strength can still maintain more than 85% of the room temperature value, far higher than 50% of ordinary ABS plastic. The internal key components are more stringent: the ceramic plug of the fiber optic adapter can withstand high temperatures up to 150 ℃, avoiding the expansion of the plug caused by high temperatures; The fusion splicer is made of heat-resistant silicone material, which can maintain elasticity even in an environment of 100 ℃, ensuring that the bending radius of the optical fiber is stable at 30mm or more, and preventing signal attenuation caused by excessive bending.

The heat dissipation consideration in structural design further enhances the ability to withstand high temperatures. The surface of the box is designed with honeycomb shaped heat dissipation ribs, which increase the heat dissipation area by 40% compared to a flat structure, and can quickly transfer internal heat to the outside. In areas with high temperature control such as underground mechanical and electrical chambers (ambient temperature of 70 ℃), this design can keep the temperature inside the box below 75 ℃, which is lower than the critical tolerance temperature of the optical fiber (85 ℃). More importantly, the sealing component adopts a fluororubber sealing ring, which has a compression permanent deformation of ≤ 20% at high temperatures (50% for ordinary nitrile rubber), ensuring that it can maintain IP68 waterproof and dustproof performance even after long-term high temperature use, avoiding the intrusion of hot air carrying dust.

In terms of equipment lifespan, high temperature resistance directly translates into an extension of maintenance cycles. According to data from a high-temperature mining area in a certain coal mine, ordinary junction boxes will experience water leakage caused by aging sealing rings in an environment above 60 ℃ for an average of 3 months. However, the replacement cycle for high-temperature junction boxes has been extended to 18 months, reducing single maintenance costs by 60%. Near the underground fire zone (ambient temperature of 80 ℃), the annual variation of transmission loss of internal optical fibers is ≤ 0.2dB, much lower than the 1.5dB of ordinary junction boxes, greatly reducing the need for replacement due to signal degradation.

The communication link from equipment monitoring in high-temperature mining faces to geothermal anomaly areas, Dalian Mining Fiber Optic Junction Box, with dual material and structural guarantees, maintains stable connections in hot environments, increasing the effective service life of equipment from "quarterly calculation" to "annual measurement", providing long-lasting and reliable communication support for safe and efficient production in high-temperature mines.