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Method for constructing compact double-loop overhead line by adoption of flying powered parachute

A construction method and technology of powered parachutes, applied in the direction of overhead lines/cable equipment, etc., to achieve good ecological benefits, reduce felling, and protect the ecology

Inactive Publication Date: 2015-06-03
国网江西省电力有限公司经济技术研究院
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Problems solved by technology

[0004]In erecting high-voltage lines in remote alpine dense forests or hilly areas, if the method of laying out the guide ropes by conventional manpower is used, the construction is difficult and the operating cost is high; If the area is erected, a large amount of wood must be cut down, which will damage the ecology and affect the environment

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  • Method for constructing compact double-loop overhead line by adoption of flying powered parachute

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Embodiment Construction

[0026] The lead ropes deployed by flying powered parachutes need to be light in weight, high in tensile strength and have insulation properties. The Dyneema rope has a light unit weight (the diameter strength of the Dyneema rope is basically the same as that of the steel wire rope, but its weight is only 15% of the steel wire rope. ), good insulation (its power frequency withstand voltage value is 300kV / m), so the lead rope adopts Dinima rope, that is, the first-level lead rope is D 4.0 Dyneema rope, the second level guide rope is D 6.0 Dyneema rope.

[0027] Taking No. 353-354, the most important control stall in this tender section (gap distance 353m, No. 354 iron tower is 99.0m away from the 220kV building public line spanning the object; low side hanging point No. 353 suspension point has a clearance height of 14.1m to the span object), calculate get:

[0028] (1) Primary lead rope D The linear density of the 4.0 Dyneema rope is 0.009kg / m, the pay-off tension is 111N...

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Abstract

Provided is a method for constructing a compact double-loop overhead line by adoption of a flying powered parachute. According to the invention, a traction rope is unfolded by a flying powered parachute, and wires are unfolded under tension through one-pull-six of the traction rope, thus realizing erection of a high-voltage cable. By applying the method in construction, the construction period is shortened, the fee of compensation for young crops is reduced, the cost of human resources is reduced, the work efficiency is improved, and the comprehensive cost can be reduced by about half compared with manual guide rope unfolding. The method of the invention is applicable to power cable erection in remote forest areas and hilly areas.

Description

[0001] technical field [0002] The invention relates to a construction method for stringing a compact double circuit by using a flying powered parachute, which belongs to the technical field of electric power transmission and distribution. Background technique [0003] With the rapid development of my country's economy, the achievements of reform and development have benefited remote areas. Some old, young, frontier and poor areas not only have access to electricity, but also urgently need to vigorously develop local resources. For this reason, high-voltage power lines need to be extended to many remote mountainous areas. [0004] To erect high-voltage lines in remote mountains, dense forests or hilly areas, if the method of laying out the guide ropes by conventional manpower is used, the construction is difficult and the operating cost is high; and if erected in forested and hilly areas, a large amount of wood must be cut down, resulting in ecological damage and environ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/04
Inventor 龚文凯黄桂林吴组应徐军元
Owner 国网江西省电力有限公司经济技术研究院