| 摘要 |
FIELD: subsurface laying and wiring of fiber bundles in plastic pipes using pneumatic method. ^ SUBSTANCE: each section of fiber bundle disposed beyond pipeline is placed in plastic pipe whose outer diameter is smaller than that of pipeline, the latter is tightly joined through adapter to plastic pipe, plastic pipes are tightly joined with pipe connections of dead-end box made in sealed cast-iron protective casing, and fiber bundles are connected within this box. Plastic pipes holding fiber bundles are coiled in turns at permissible bending radius so as to ensure that dead-end box occurs inside one coil formed at the same time from turns of two plastic pipes or between two coils, each being formed from turns of one plastic pipe. Butt-ends of pipelines, plastic pipes holding fiber bundles, and dead-end box are placed in fiberglass shell tied to pipelines to protect them from rodents. ^ EFFECT: enhanced reliability and service life of fiber-optic lines using light-mass fiber bundles laid in subsurface plastic pipes. ^ 3 cl, 4 dwg |
