Special full-automatic fire-extinguishing system for efficient extra-high-voltage converter transformer

Abstract

The invention relates to a special full-automatic fire-extinguishing system for an efficient extra-high-voltage converter transformer. The special full-automatic fire-extinguishing system comprises anultrafine dry powder fire extinguishing system and a water agent fire extinguishing system, wherein a plurality of water and powder mixing and spraying assemblies are jointly connected with a water agent spraying pipeline and a powder spraying pipeline; and a plurality of fine water mist outlets which communicate with water containing cavities and are distributed around ultrafine dry powder outlets are arranged at the bottoms of nozzles, and water agent inlets are connected with the water agent spraying pipeline. The special full-automatic fire-extinguishing system has the beneficial effectsthat the combination of a physical fire extinguishing agent and a chemical fire extinguishing agent is realized, and in particular, the effect is obvious when the insulation oil of the converter transformer flows out to form flowing fire, the generation of secondary explosion can be prevented, and the hazard degree of a disaster accident is reduced to the minimum.

Description

technical field [0001] The invention relates to a fully automatic fire extinguishing system dedicated to high-efficiency UHV converter transformers. Background technique [0002] A transformer is a power device that uses the principle of electromagnetic induction to convert alternating current energy into parameters such as different voltages and currents. Among them, the oil-immersed transformer immerses the iron core and winding in an oil tank filled with insulating oil to strengthen insulation and improve cooling and heat dissipation conditions. When faults such as serious overload, short circuit, and insulation damage occur inside the transformer, the insulating oil is subjected to high temperature or arc action, and thermally decomposes to produce a large amount of hydrocarbon mixed gas, which causes the pressure inside the transformer to rise sharply, and then causes the structural damage of the transformer oil tank (primary transformer explode). [0003] After the p...

AI Technical Summary

Problems solved by technology

After the water is sprayed by the nozzle, it presents a state of fine water mist, which can cover the protection object. The fire trucks used in the rescue station are mainly foam fire trucks. The fire extinguishing method has low fire extinguishing efficiency, long duration of fire extinguishing battle, and large consumption of fire extinguishing agent. Once the insulating oil of the converter transformer flows out to form a flowing fire, it often takes several hours or even more than ten hours to extinguish the fire. The loss caused by the fire is huge. For example, at the UHV Quancheng Station in Renfeng Town, Jinan, water spraying and foam fighting took up to 16 hours

The ultra-fine dry powder fire extinguishing agent chemically inhibits fire by cutting off the combustion reaction chain. It is the fire extinguishing agent with the highest fire extinguishing efficiency among the known fire extinguishing agents (the fire extinguishing efficiency reaches 50g / m³). The disadvantage is that the fire extinguishing agent cannot be continuously supplied and the cooling effect Low, light weight, easy to float, when the wind speed is greater than 3m / s, it is not suitable for outdoor applications

Fine water mist fire extinguishing agent and ultrafine dry powder fire extinguishing agent have their own advantages and disadvantages, and there is no precedent for combined application in converter transformers

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