Aug 20, 2024
Fiber cable blowing is a safe and effective optical cable laying method. During the cable laying process of the cable blowing machine, the traction force of the dragger, the blowing force of the compressed air and the thrust of the conveyor belt act on the optical cable at the same time.
Technical Points Of Fiber Cable Blowing
1.The fiber blowing equipment must be of a model suitable for the characteristics of the project. The air pressure at the compressor outlet should be maintained at 0.6~1.5MPa, the air flow should be greater than 10m³/min, and the cable blowing machine should be hydraulically driven (or air flow driven). The propulsion force of the device should meet the requirements.
2.Before blowing the air blown fiber cable, the pipeline should be tested for air retention and continuity, and the cable should be blown only after confirming that the pipeline is not damaged, leaking, sprained, and free of dirt and other debris.
3.Cable blowing lubricant should be added into the pipe before blowing the cable. The amount added is determined based on the smoothness of the inner wall of the pipe hole, the complexity of the pipeline path, the length of the cable blowing, the type of lubricant, etc. The amount of lubricant added is directly related to the length and speed of the blowing cable.
4.When the pipeline path has a large gradient, the piston cable blowing head laying method should be used to increase the traction force of the front section of the optical cable.
5.When the conduit is relatively flat, but there are large bends in certain sections of the pipeline, the piston-less cbale blowing head laying method should be used.
6.The optical cable should be cleaned continuously during the blowing process to prevent mud and water from entering the pipe along with the optical cable and increasing the friction force.
7.The blowing speed of the optical cable should be controlled between 60 and 90m/min, and should not exceed 100m/min, otherwise the construction personnel are not easy to operate, and it is easy to cause optical cable sprain.
8.During the cable jetting project, if the pipe fails to blow in or the speed is extremely slow (below 10m/min), the fault location should be found first and treated before blowing to prevent damage to the optical cable or cable blowing equipment.
9.When blowing cables, special personnel must be installed at the opposite end of the pipeline to protect and maintain communication to prevent the test rod, air blower and other objects from blowing out and injuring people. Protective personnel should also do a good job in preparing the optical cables after they are blown out.
10.Safety should be ensured when the optical cable is blown or placed in the "8" reserved coil. The bending radius should not be less than the specified requirements.