Fiber preparation
1. Remove the sheath of the optical cable (if any, please remove the shielding and armoring) and then remove the wrapping layers to expose the loose tube. For the specific method, please follow the standard method recommended by the optical cable manufacturer. The prepared length is 3m.
2. Clean the loose tube and the reinforcing core sheath with detergent, remove the excess filling tube, and polish the outer sheath of the optical cable to a length of 150 mm with the provided sandpaper.
Fiber optic cable installation
1. Select the sealing ring with the smallest inner diameter according to the outer diameter of the optical cable, and put the two sealing rings on the optical cable.
2. Put the optical cable into the corresponding entry hole.
3. Connect shielding and grounding.
4. Wrap the self-adhesive sealing tape between the two sealing rings, so that the sealing tape is wound to be even with the outer diameter of the sealing ring to form a sealed end of the optical cable.
5. Press the cable sealing end into the cable entry hole.
6. Use the throat hoop to pass through the fiber optic cable reinforcing rib fixing seat and the cable core bracket, fix the optical cable on the base of the joint box, and tighten the throat hoop screw until the throat hoop is tightened.
7. Tie a nylon cable tie on the optical cable and cut off the excess length.
8. For other unused optical cable holes, please seal them with plugs. Also wrap the sealing tape on the plug.
9. Wrap the reinforcing member on the countersunk head screw of the welding plate support and press it tightly.
fiber splicing
1. Prepare the optical fiber coiled for 1.5 laps after coiling, and then coil all the remaining fibers in the box.
2. Please use a single-core buffer tube for loading a single-core fiber, and a ribbon buffer tube for loading a ribbon fiber. Fasten the inlet of the splice tray with nylon cable ties.
3. Butt two (belt) optical fibers according to the prescribed method, and the connector is inserted into the slot of the fusion splicing unit, and the excess length should be coiled in the reel.
4. Put the cover on the splice tray, please press it to lock it in place.
5. According to the required capacity of the splice box, the number of superimposed splicing trays is determined. The superimposed type of the splicing trays must meet the requirements for the optical fiber connector to be inserted into the fusion splicing unit and inspected and maintained.
Every two welding discs are superimposed, and the six holes on the rubber hinges can be clamped respectively on the three protrusions on the upper and lower plates; four rubber hinges, two symmetrical positions on both sides of the disc, such as stacking five For the fusion plate, according to the above method, buckle the second layer plate and the third layer plate, the third layer plate and the fourth layer plate, and the fourth layer plate and the fifth layer plate, and so on, and the five plates are stacked together stably .
When it is necessary to check or maintain the welding condition of a certain layer of trays, just remove the two hinges fastened by the upper layer on one side of the tray, and the fusion splicing tray can be opened like turning pages of a book.
Box seal
1. Box packaging: Before packaging the box, tighten the valve nozzle and the grounding screw together. Insert the sealing strips into the sealing grooves around the box body; also insert the sealing strips into the grooves at the "U" grooves at both ends of the joint box. Note: Use the sealing strip, do not artificially pull the sealing strip to avoid leakage.
2. Gently close the upper cover of the joint box, screw in the fastening bolts, tighten the fastening sequence according to the sequence of numbers marked on the cover, tighten with a torque wrench, and the torque reaches 25N·m.
3. After waiting for 5 minutes, tighten them sequentially with a torque wrench, and the torque still reaches 25N·m.
Removal of the lid
1. Loosen 10 fastening bolts in order, and the cover and seat are still together at this time.
2. Take four fastening bolts and insert them into the four corners of the box body, and screw them into the top cover of the four corners symmetrically and evenly, so that the separation between the cover and the seat is as high as 6mm.
3.After 5 minutes, evenly top the cover to separate the cover and seat by >6mm, until the cover and seat can be easily separated by hand. Note: The cover must be removed gently when detaching to avoid damage to the spliced fibers.
