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Method of extra-high voltage tension stringing

A tension stringing and ultra-high voltage technology, applied in the high-voltage field, can solve the problems of high safety risks, general operation effect of large-tonnage rotary connectors, and large force on the traction rope, and achieve the effect of reducing safety risks

Active Publication Date: 2009-11-18
HUNAN PROVINCIAL TRANSMISSION & DISTRIBUTION ENG +2
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Problems solved by technology

[0005] However, due to the large number of UHV transmission wires and the relatively thick transmission wires, when the above-mentioned "one pull eight" tension stringing method is adopted, large-tonnage traction equipment is required
In this way, for many construction units, it is necessary to purchase new traction equipment and other tools, and the operation effect of the large-tonnage rotary connector is average, so the force on the traction rope is too large, and the safety risk is high

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Embodiment Construction

[0035] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] In order to enable those skilled in the art to implement the present invention better, the following first introduces the deployment process of the traction rope of the traction field.

[0037] see figure 1 , which is a schematic diagram of the traction rope deploying equipment based on the traction field of the present invention.

[0038] Eight traction ropes enter the traction equipment through two five-wheel blocks 106. Traction equipment includes four two-line stretching machines.

[0039] figure 1 Eight 50KN ground anchors 104 are buried underground, and what is connected with the ground anchors 104 is a temporary anchor frame 105 . The anchor frame 105 is used for erecting the traction rope.

[0040] Eight traction ro...

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Abstract

The invention provides a method of extra-high voltage tension stringing, including the steps that: a flying powered parachute spreads out two first dyneema ropes; the two first dyneema ropes pull two second dyneema ropes; the two second dyneema ropes lead a guidance rope in a wire purchase tackle; by means of using line two (one-pull-four) mode, two guidance ropes are used for leading eight pulling ropes in the wire purchase tackle; a pulling field and a tension field are respectively provided with four two-rope pulling-tension integrated machines that synchronously roll eight pulling ropes and gradually change the eight pulling ropes for eight leads. Therefore, by adopting a method of eight-pulling-eight tension stringing to effectively decompose the traction force of eight leads on the pulling ropes, the stress on each pulling rope is less and the safety risk is reduced. Therefore, conventional pulling equipment can be adopted to meet construction requirements without changing for new pulling equipment.

Description

technical field [0001] The invention relates to the technical field of high voltage, in particular to a method for stringing wires under ultra-high voltage tension. Background technique [0002] At present, the State Grid Corporation of China has built a 1000kV AC power grid. Since 1000kV belongs to the UHV power grid, many original technical means cannot meet the requirements of the current UHV power grid. For example, tension stringing technology for 1000kV UHV line engineering. [0003] Many construction units adopt the construction method of "2 × one lead four" or "one lead eight" for 1000kV UHV lines, both of which are extensions of traditional construction methods. [0004] "One pull eight" tension stringing construction method means that two sets of four-wire tension machines are installed in the tension field, one traction machine with large traction force is installed in the traction field, and a set of nine-wheel pay-off pulleys are hung on each base iron tower a...

Claims

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Application Information

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IPC IPC(8): H02G1/02
Inventor 郑宝森张建坤向元桢李根先刘长根阙正平蒋元林周金星毛璇娟吴志刚吴鹏
Owner HUNAN PROVINCIAL TRANSMISSION & DISTRIBUTION ENG
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