Seven Emergency Treatment Methods For Blowing Cable Project

The cable jetting solution for laying optical cables uses air pressure blowing to blow the optical cable into the laid HDPE conduit pipe. The cable blowing method for laying optical cables is widely used. We may encounter some emergency problems when we carry out cable blowing construction, so how should we respond in time? Here are seven emergency treatment methods for blowing cable construction.

1.According to the operating instructions of the air compressor and fiber blowing machine, first check whether the mechanical equipment is normal.

2.Check whether the sealing ring of the cable jetting machine and the optical cable are too tight. If the outer diameter error of the optical cable is large, the fit is too tight, and the rotation is inflexible, it will also be difficult to blow the cable. You can make it rotate flexibly by replacing the sealing ring.

3.During the construction process, if the optical cable spins or bends in front of the cable blowing machine and cannot move forward, the exhaust pressure of the air compressor and the advancement speed of the fiber optic cable blowing machine should be quickly reduced, and the pressure cannot be forced to avoid damage to the optical cable. If the air blowing fiber moves forward after decompression and deceleration, it means that the telecom silicon core tube is partially crushed or has other faults. After the optical cable passes through the fault point, it is pressurized and accelerated again. If the optical cable still cannot move forward after decompression and deceleration, the machine should be shut down immediately. Carry out system checks and troubleshoot.

4.If everything above is normal, turn on the machine and check whether the air pressure at the outlet end of the silicon tube is reduced. If the air pressure at the outlet end of the silicon core tube decreases, it indicates that there may be an air leakage fault in the pipeline, and efforts should be made to eliminate the fault.

5.If the cause cannot be identified, an appropriate amount of cable blowing lubricant should be added to the nozzle at the blowing end, and then the pulse blowing method (that is, the air compressor is turned on and off) is used to make it move forward. The rationale for this is that removing the air pressure in the pipeline and then suddenly pressurizing it will reduce the tangential static force accumulated along the length of the optical cable in the pipeline.

6.If none of the above methods are effective, the micro duct conduit can only be disconnected at the point where the cable feed is stopped and the air blown micro cable is laid for secondary blowing. After restoration, add marking stones at the disconnection points and indicate them on the construction drawings.

7.Cable blowing treatment when the outer diameter of the air blown fiber optic cable is large and there are many "S" bends or bends.

i). When blowing cables in areas with large outer diameters and "S" bends, it is advisable to operate at lower temperatures and lower humidity, and try to avoid mornings and evenings. The main reasons are:

ii). When the humidity is low, the cable blower machine drive belt and optical cable are not easy to slip, and it is easier to make the drive belt and the optical cable hole fit properly during installation (slippage and inappropriate tightness of the drive belt will affect the air blowing optical cable).

iii). When the temperature is too high, the viscosity of the air flow sent into the pipeline increases (the gasification component increases), which increases the air blowing resistance (the tangential hydrodynamic "shear force" accumulated along the length of the optical cable increases). At the same time, if the temperature is too high, the silicon layer on the inner wall of the silicon tube will soften, increasing the friction coefficient of the inner wall.

During construction in the high-temperature season of summer, an air condensation separator must be installed after the air compressor, and the exhaust pressure of the air compressor should be appropriately increased. The air flow density after the condenser will increase, which will reduce the air pressure.

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