Anti-rotation device for cable stringing
AssigneeQuanta Associates, L.P.
InventorDaniel Neil O'Connell
Life of this patent
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Abstract
An anti-rotation device is provided for stringing a cable or wire while reducing a twisting moment of the cable or wire as it is strung. The device includes a tow component, having multiple tow sections pivotally connectable end-to-end. A plurality of electrically insulated weighted tails are suspended so as to hang from the tow component. Each of the tails includes weighted tail sections releasably connectable end-to-end to one another. At least one electrically insulated tail section is provided in each tail between the tow component and at least some of the weighted tail sections. The tails are constrained to only articulate relative to the tow component in the single plane of bending of the tow component.
Claims15
An anti-rotation device to resist twisting of a cable or wire as it is strung through a transmission/distribution network, said device comprising a tow component connectable to the cable or wire at one end, and at least one electrically insulated weighted tail pivotally suspended from the tow component and having a storage channel formed and sized to nest a length of the tow component therein, wherein the at least one tail includes at least one weighted tail section and at least one electrically insulated tail section removably and pivotally connected end-to-end to one another, the at least one tail positioned along the tow component so that the tow-component is completely nested in and along the storage channel in the at least one tail as the tow component and the east one tail are pulled through a sheave during the stringing of the cable or wire, wherein said device is produced by the process of:
- a) determining a peak rotational force twisting moment of the cable or wire as it is strung through the transmission/distribution network;
- b) determining a length and distributed weight requirement for the at least one tail to produce a counter-moment, substantially more than or equal to and counter to the rotational force twisting moment of the cable or wire;
- c) providing
- (i) a number of the weighted tail sections, wherein the number of the weighted tail sections is determined to meet the length and weight requirement of the at least one tail, and wherein the width of the tow component is constrained by the width of the storage channel in the at least one tail and the width of the at least one tail is constrained by the width of an annular groove around the sheave, wherein the length and width of the at least one tail and the material and hence weight of each weighted tail section within the least one tail is determined by the distributed weight requirement to produce the required counter-moment produced by the at least one tail, and wherein the weighted tail sections are adapted for end-to-end connection to one another,
- (ii) the at least one electrically insulated tail section adapted for end-to-end connection to the weighted tail sections;
- and
- d) connecting the weighted tail sections and the at least one electrically insulated tail section so as to position the at least one electrically insulated tail section adjacent the tow component, interleaved between the tow component and the weighted tail sections.
An anti-rotation device for resisting twisting of a cable or wire as it is strung in a stringing direction from an upstream end to a downstream end through a transmission/distribution network, the device comprising:
- a) a tow component adapted to be connected to the cable or wire wherein the tow component includes a plurality of tow sections;
- b) at least one Ix insulated weighted tail suspended from and pivotally mounted to the tow component, and wherein, where the at least one tail is a plurality of tails, the plurality of tails are pivotally mounted in a spaced apart array along the tow component, for pivotal rotation of the tails between a suspended position suspended below the tow component and a pivoted position flush along the tow component, wherein each of the at least one tail includes:
- (i) at least one weighted tail section;
- and
- (ii) at least one electrically insulated tail section connected end-to-end to the at least one weighted tail section, between the at least one weighted tail section and the tow component;
- and
- wherein the spaced apart array of tails are spaced along the tow component such that a first length of the tow component between adjacent first and second tails is at least equal in length to a length of the first tail, wherein the first tail is upstream of the second tail in the stringing direction, and wherein the tail sections each have a storage channel formed therein so as to form a continuous linear storage channel when the tails are suspended from the tow component, so that as the tails pivot to rotate upwardly they engage, partially encase and lie flush along the tow component, the tail sections in each tail thereby collectively forming the continuous linear storage channels having a width and a length along the tails, and wherein the width of the tow component is constrained by the width of the continuous linear storage channels in the tails so that the tails snugly receive a corresponding length of the tow component in their continuous linear storage channels as the tow component and the tails pass over a traveler or sheave in the network during the stringing, and
- wherein the length and width of each tail and the material of each tail section of each tail determines a weight distribution of, and the amount of counter-moment produced by, each tail, and each tail is adapted to provide a counter-moment, counter to the rotational twisting of the cable or wire.
Dependencies are inferred from the claim text.