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One-pulling-two expansion and construction process of large-section lead

A construction technology and large cross-section technology, applied in the direction of cable laying equipment, etc., can solve the problems of inability to guarantee the safety of the construction process, construction quality, etc., to ensure the quality of wiring construction, occupy a small area, and avoid inconsistent wire sag Effect

Active Publication Date: 2015-07-01
HUBEI ELECTRIC POWER TRANSMISSION & DISTRIBUTION ENG
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0002] 800kV UHV DC transmission line project K3 large span adopts 4 splits of 1040mm 2 Large cross-section conductor, the conductor type is AACSR / EST-720 / 320, which has not been used in domestic transmission lines. There is no mature experience to follow in China for other projects. According to the existing UHV line construction technology, the safety and construction quality of the construction process cannot be guaranteed. Therefore, the 4-split 1040mm 2 A new construction method suitable for actual engineering requirements needs to be proposed for the construction project of large cross-section conductor stringing

Method used

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  • One-pulling-two expansion and construction process of large-section lead
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  • One-pulling-two expansion and construction process of large-section lead

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specific Embodiment

[0024] The specific technical scheme of the present invention is illustrated by the test of tension stringing of large-section conductors in ±800kV UHV DC transmission lines.

[0025] 1. Before construction

[0026] According to the number of line construction bids, path length, number of iron towers, spanning distance, type and parameters of wires, select the specifications and models of ground wires, specifications and parameters of traction ropes and guide ropes, and calculate the various parameters used for setting out wires. The parameters of anti-twist wire ropes of different specifications, select the type and quantity of the main equipment and tools for "one pull 2" wire erection construction, and choose the "one pull 2" deployment plan, that is, use one tractor to connect with two sets of wire ropes. Cooperate with the tension machine, use the "one pull 2" walking board and the three-wheel pay-off block to cooperate with the pay-off, comprehensively consider various f...

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Abstract

The invention discloses a one-pulling-two expansion and construction process of a large-section lead. The expansion and construction process is characterized by comprising the following steps of: (1) construction preparation: performing crimping test on a lead and an earth wire, arranging a tension field space and a traction field space, and cleaning a construction channel; (2) hanging a tackle; (3) carrying out span construction; (4) carrying out tension stringing, expanding the earth wire and the lead, and carrying out temporary anchoring in time; and (5) crimping the lead, performing stringing, observing looseness, and lashing wires to complete the whole construction. According to the invention, the same-phase leads are guaranteed to have identical stringing tension, and the stringing construction quality is guaranteed; furthermore, the construction processes of stringing, tackle hanging, lead leading and traction rope expansion, lead expansion, stringing, accessory installation and the like are optimized, and the tension stringing construction efficiency is effectively improved; the manpower and time wastes are reduced, the required equipment quantity is small, the occupied area is small; and the one-pulling-two expansion and construction process has higher social economy.

Description

technical field [0001] The invention relates to a construction technology of a transmission and transformation power line, in particular to a construction technology of one lead and two stretching of a large cross-section conductor. Background technique [0002] 800kV UHV DC transmission line project K3 large span adopts 4 splits of 1040mm 2 Large cross-section conductor, the conductor type is AACSR / EST-720 / 320, which has not been used in domestic transmission lines. There is no mature experience to follow in China for other projects. According to the existing UHV line construction technology, the safety and construction quality of the construction process cannot be guaranteed. Therefore, the 4-split 1040mm 2 A new construction method that is suitable for actual engineering requirements needs to be proposed for the construction project of large-section conductor stringing. Contents of the invention [0003] The purpose of the present invention is to solve the problems ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G1/06
Inventor 彭世建邹俊高文林金辉陈宏学余秋安李志刚宁红斌李祖元
Owner HUBEI ELECTRIC POWER TRANSMISSION & DISTRIBUTION ENG
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