A design method of live high-lift fire extinguishing equipment for mountain fires in transmission lines

Abstract

The invention discloses a method for designing live-wire high-lift fire extinguishing equipment for an electric transmission line mountain fire. The method for designing the live-wire high-lift fire extinguishing equipment for the electric transmission line mountain fire comprises the steps that the maximum phase voltage is obtained; the atomization spraying range and the mist drop diameter of fine water mist of the fire extinguishing equipment are selected; the needed mountain fire extinguishing flow of a wild electric transmission line is calculated; parameters of an atomization spray nozzle and the range of the input pressure of the spray nozzle are selected; the flowing Reynolds number, the frictional pressure loss coefficient, the frictional head loss and the frictional pressure loss of a fire extinguishing aqueous solution in a water conveying band are calculated; the minimum value of the water pump output pressure of the fire extinguishing equipment is calculated; and according to the water pump output pressure of the fire extinguishing equipment and the water pump pressure output characteristic curve of the fire extinguishing equipment, the water pump flow and the water pump pressure are selected. The method for designing the live-wire high-lift fire extinguishing equipment for the electric transmission line mountain fire has the beneficial effects that a fire extinguishing aqueous solution is fully atomized through the fine water mist spray nozzle, the insulating performance of the fire extinguishing aqueous solution is improved, and live-wire fire extinguishment is achieved; the fire extinguishing efficiency is improved due to addition of a fire extinguishing agent, the low is reduced, and therefore high-lift fire extinguishment is achieved; and a complete and workable method is provided for the design of the live-wire high-lift fire extinguishing equipment for the electric transmission line.

Description

technical field [0001] The invention relates to the technical field of mountain fire prevention for power transmission lines, in particular to a design method for high-lift fire extinguishing equipment for live charged mountain fires on power transmission lines. Background technique [0002] Affected by production and life, wildfires have spread to most countries in the world, including Canada, the United States, and China. In recent years, UHV AC / DC transmission lines have experienced many trips and lockouts due to wildfires. Wildfires have become a new hot issue that seriously threatens the safe operation of the large power grid and the normal power supply of the society. [0003] Fire extinguishing of mountain fires on transmission lines is an effective control method to prevent line trips caused by the spread of mountain fires. However, the voltage of transmission lines is high and the fire water conducts electricity. Fire extinguishing may cause electric shock and casua...

AI Technical Summary

Problems solved by technology

There is no fire extinguishing equipment design method for long-gap, high-voltage transmission line mountain fires in the field. The range and insulation performance of existing ordinary fire extinguishing equipment cannot meet the fire extinguishing requirements of transmission line mountain fires.

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