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A Lightning Protection Skynet for Cable Cranes in Hydropower Stations

A technology of cable cranes and hydropower stations, which is applied in the directions of transportation and packaging, load hanging components, safety devices, etc., can solve the problems of inability to protect the cable crane from direct lightning strikes, achieve remarkable application effects, ensure equipment and personal safety, and ensure construction short cycle effect

Inactive Publication Date: 2019-01-29
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, lightning protection for cable cranes in hydropower stations at home and abroad mainly adopts the installation of lightning arresters and surge absorbing devices in the high-voltage and low-voltage parts of electrical equipment, which can only protect against lightning waves that invade the power supply along the line, and cannot protect direct lightning strikes. Hazards of lifts

Method used

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  • A Lightning Protection Skynet for Cable Cranes in Hydropower Stations
  • A Lightning Protection Skynet for Cable Cranes in Hydropower Stations
  • A Lightning Protection Skynet for Cable Cranes in Hydropower Stations

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Embodiment

[0031] (1) Arrangement of lightning protection wires: Taking 4 cable cranes as an example, all 4 cable cranes are of translational type, the lifting installation condition is 25t, the pouring condition is 20t, the span of the cable crane is about 500m, and the elevations of the left and right bank platforms are 3375.00m, the altitude of the main car of the cable machine is 3386.55m, the altitude of the auxiliary car of the cable machine is 3384.872m, and the length of the tracks on both sides is about 156.00m. The lightning protection grounding overhead lightning protection wire is arranged above the 4 cable cranes, and the lightning protection covers the operating range of the 4 cable cranes.

[0032] Determine the minimum number n of lightning conductors. L=156.00m, according to the operating environment of the cable machine, the length margin δ=5m, H 0 =3375.00m, H=3384.872m, substituting into the formula, the smallest integer n can take is 6. At this time D=33.2m. The t...

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Abstract

The invention discloses an anti-thunder sky net arranged for cable cranes of a hydropower station. According to the anti-thunder sky net arranged for the cable cranes of the hydropower station, a plurality of parallel lightning conductors are used for covering the running range of all the cable cranes. The lightning conductors are placed in parallel, and are parallel to a traction cable of the cable cranes, and are perpendicular to main / auxiliary trolleys of the cable cranes. The altitude of a lowest point capable of being protected by the lightning conductors is higher than that of the main / auxiliary trolleys of the cable cranes, so that the anti-thunder sky net can cover the running range of the cable cranes. The lightning conductors are connected and fixed through rope clamps and the lightning conductors and round steel are connected and fixed through rope clamps, and the round steel and grounded flat steel are connected in a welded manner. The anti-thunder sky net arranged for the cable cranes of the hydropower station has the remarkable beneficial effects that the anti-thunder effect is reliable, the popularization degree is high, the construction period is short, and the erecting cost is low.

Description

technical field [0001] The invention relates to the field of lightning protection for electrical equipment, specifically a lightning protection skynet for cable cranes in hydropower stations (hereinafter referred to as "cable cranes"), especially a lightning protection skynet for cable cranes in hydropower stations. Background technique [0002] The cable crane refers to a type of engineering crane in which the lifting trolley with the pick-up device runs along the overhead load-bearing cable. On the construction site of a hydropower station, the cable crane is usually arranged at the highest point of all construction equipment and hydraulic structures, and the location of the hydropower station is usually an area with a high incidence of lightning damage, so it is easy to be struck by lightning. The cable cranes at the construction sites of domestic Goupitan, Jinping, Xiluodu, Xiangjiaba, Dagangshan and other hydropower stations have been struck by lightning many times, res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C15/00
CPCB66C15/00
Inventor 周文俊夏大勇李涵喻剑辉夏学智
Owner WUHAN UNIV
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