Anti-explosion spray head for ultrahigh-voltage converter transformer and fire fighting system

Abstract

The invention provides an anti-explosion spray head for an ultrahigh-voltage converter transformer. The anti-explosion spray head for the ultrahigh-voltage converter transformer comprises an externalspray head pipeline, a liquid inlet pipeline and a liquid inlet mixing cavity; the liquid inlet pipeline is fixed in the external spray head pipeline; the liquid inlet mixing cavity and the liquid inlet pipeline are coaxially arranged; an expansion joint capable of stretching along the axial direction is arranged between the liquid inlet pipeline and the liquid inlet mixing cavity; the liquid inlet pipeline and a fire fighting pipeline are fixedly connected and keep communication; the external spray head pipeline is fixedly connected with the fire fighting pipeline, and arranged on the outer layer of the liquid inlet pipeline in a sleeving manner; the other end of the external spray head pipeline is an open end; a spray head is arranged on the liquid inlet mixing cavity; and a driving unitis also arranged on the external spray head pipeline. The invention further provides a fire fighting system using the fire fighting spray head. The anti-explosion spray head for the ultrahigh-voltageconverter transformer and the fire fighting system in the invention have the advantages that the spray head is hidden in the external spray head pipeline when the fire fighting system does not work;the spray head cannot be damaged when explosion occurs; after the explosion occurs, the spray head stretches out from the external spray head pipeline to work, so that an anti-explosion effect is realized; therefore, the spray head is prevented from being impacted by explosion; and normal operation of the fire fighting system is ensured.

Description

technical field [0001] The invention relates to the technical field of fire fighting and fire extinguishing, in particular to an explosion-proof sprinkler and a fire fighting system for an ultra-high voltage converter transformer. Background technique [0002] In long-distance power transmission, UHV DC transmission technology has been implemented on a large scale in engineering applications because it has the characteristics of large transmission capacity, long transmission distance, and small transmission loss compared with UHV AC transmission technology. However, it needs to be configured in UHV transmission The converter substation performs DC and AC conversion; the construction and operation costs of the converter substation are far higher than that of the UHV AC substation with the same voltage level and transmission capacity. Transformer oil, if a fault occurs inside the converter transformer, the converter transformer oil will produce a large amount of combustible ga...

AI Technical Summary

Problems solved by technology

[0004] However, when the bushing, bushing riser, tap changer, fuel tank body and other components explode and catch fire, the bushing, riser, BOX-IN and other facilities will be blown up, and the blown parts and the explosion shock wave will also be destroyed. It will damage the adjacent fire sprinklers, which will lead to the failure of the entire fixed fire extinguishing system. Failure to extinguish the fire in time will bring great safety hazards and economic losses

The main reasons are: (1) The blown water spray nozzles, foam spray nozzles, etc. will directly fail

(2) The damage of some nozzles will affect the spray effect or foaming ability of the remaining nozzles, and the fire-fighting medium may leak from here, which will waste a lot of fire-fighting water or foam mixture

(3) The high temperature of the fire causes the deformation of the fire branch pipe, which cannot envelop the target area of ​​fire extinguishing, resulting in the failure of fire extinguishing

The gaps in the converter transformer body caused by the explosion at the above parts will also produce overflow fires. If the fire sprinklers corresponding to these parts are damaged in the explosion, it will greatly increase the difficulty of fire fighting

Images