| 摘要 |
A fiber optic cable pulling method includes a series of large-diameter capstan winches placed at intermediate access points along the conduit through which the fiber optic cable is to be pulled. Each capstan winch pulls a portion of the cable through a segment of the conduit at a substantially uniform velocity. The capstan wheel of each winch is sized frictionally to engage the cable without exceeding its minimum bending radius. The winches are independently controlled by controllers which limit the rate of hydraulic fluid and its pressure flowing to the hydraulically powered winch, and thereby maintain pulling tension on each portion of the cable below a predetermined tension, if exceeded, which could damage the fiber optics in the cable. The capstan winches are spaced sufficiently close together so that the pulling tension necessary to pull a portion of cable through each conduit segment is ordinarily less than the tension provided by the capstan winches. If a portion of the cable catches in a segment of conduit, the winches cease pulling along the entire length of the cable.
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