Dalian mining fiber optic junction box: wear-resistant, impact resistant, and stable connector for complex mine environments

Dalian mining fiber optic junction box: wear-resistant, impact resistant, and stable connector for complex mine environments

In the deep and dark tunnels of the mine, the mining fiber optic junction box is like a silent guardian, ensuring smooth fiber optic communication links in complex environments with its wear-resistant and impact resistant hard core performance. It is not only a physical carrier for fiber optic connections, but also a key node for ensuring stable underground data transmission.

The wear resistance of Dalian mining fiber optic junction box is due to the dual support of special materials and surface technology. The shell is made of high-strength ductile iron or engineering plastic (such as reinforced PA66), with a hardness of HB200 or above. The rough surface formed by sandblasting treatment can resist the friction of ore rolling in the tunnel - actual measurements show that after 1000 times of steel brush friction, the wear on its surface is only 0.02 millimeters, far lower than the 0.15 millimeters of ordinary plastic boxes. In high-frequency vibration areas such as the scraper conveyor, wear-resistant rubber bushings are used at the contact between the junction box and the cable, with a service life five times that of ordinary metal bushings, reducing signal attenuation caused by wear.

The impact resistance performance is reflected in the precise consideration of structural design. The box body adopts an arched mechanical structure, which can disperse the impact force to the entire shell. After drop testing, it was dropped from a height of 2 meters to the concrete roadway ground, and the insertion loss of the internal fiber optic joint did not change by more than 0.1dB. The buffering design of key parts is more ingenious: a silicone shock absorber pad is installed between the fiber optic fusion splicer and the box body, which can absorb more than 80% of the lateral impact force; The joint fixing seat adopts elastic buckle, which can still maintain stable connection of the optical fiber under the impact wave generated by tunnel blasting (instantaneous acceleration up to 50G). Practical data from a certain coal mine shows that using this type of junction box reduces communication interruptions caused by impact by 6-8 times per month.

In complex mine environments, this' durable 'characteristic translates into sustained and stable connectivity. In areas where personnel and equipment frequently come and go, such as the underground parking lot, the outer shell of the junction box can withstand the 3000N impact force generated by the side collision of the mining car without deformation; In the dust environment of the excavation face, the wear-resistant surface is less prone to dust accumulation, reducing the frequency of regular cleaning. More importantly, its internal fiber optic adapter uses ceramic plugs, with a plug-in life of over 1000 times. Even if accidentally touched during tunnel vibrations, it can maintain a low loss connection (insertion loss ≤ 0.3dB).

From the coal mining face of the kilometer deep well to the winding transportation roadway, the Dalian Mining Fiber Optic Junction Box is wear-resistant to resist daily friction and impact to cope with sudden collisions. It builds a strong defense line for fiber optic communication in harsh environments and has become the "invisible lifeline" for key businesses such as mine automation systems, personnel positioning, and video monitoring.