Explosion-proof device for explosion fire of extra-high voltage converter transformer

Abstract

The invention provides an explosion-proof device for an explosion fire of an extra-high voltage converter transformer. The explosion-proof device comprises vertical supporting columns and transverse supporting columns vertically fixed with the vertical supporting columns, the vertical supporting columns are arranged along a valve hall side of the converter transformer and firewall sides on two sides of a valve hall; impact-resistant plates are further fixedly arranged on the sides, close to the converter transformer, of the vertical supporting columns and the transverse supporting columns, a firefighting pipeline is located between the impact-resistant plates and the valve hall or the firewall, mounting holes are formed in the surfaces of the impact-resistant plates, and spray heads penetrate through the mounting holes and communicate with the firefighting pipeline. The explosion-proof device has the advantages that the anti-impact plates are arranged along the valve hall side and thefirewall sides of the converter transformer, so that the firefighting pipeline is effectively protected and is prevented from being impacted by explosion, and the explosion-proof performance is improved as the mounting position of the spray heads is hidden behind the anti-impact plates.

Description

technical field [0001] The invention relates to the technical field of fire-fighting facilities for UHV converter stations, in particular to an explosion-proof device used for explosion fires of UHV converter transformers. 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 gas when t...

AI Technical Summary

Problems solved by technology

[0004] When the bushing, bushing riser, tap changer, fuel tank body and other components explode and catch fire, the bushing, riser and BOX-IN (noise reduction facility) and other facilities will be blown up, and the blown parts And the explosion shock wave will also 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 other nozzles. The fire-fighting medium may leak from here, and a large amount of fire-fighting water or foam mixture will be wasted, resulting in the overall loss of pressure of the fire-fighting system and failure to work normally.

(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

[0005] In order to improve the explosion-proof performance of the fire-fighting system, the patent application with the publication number CN106390337A discloses an explosion-proof device for the fire-extinguishing system pipe network used for AC transformer explosion fires. The fire-fighting pipeline is protected by the explosion-proof device. The explosion-proof device includes a frame composed of columns and explosion-proof beams. And the explosion-proof steel mesh fixed on the frame, but the explosion-proof steel mesh cannot block all objects, and the fire pipeline will still be impacted by the explosion; and the fire sprinkler must pass through the explosion-proof steel mesh and directly act on the transformer enclosed by the explosion-proof device. In the absence of effective protection of sprinklers, the protection of fire protection pipes alone does not have much effect

The invention patent with the publication number CN208911356U discloses a compressed air foam nozzle for use in flammable and explosive environments. The anti-explosion performance is improved through integral molding, but the liquid inlet of the nozzle and the fire-fighting pipeline is still exposed to the outside, and there is a converter transformer. Risk of explosion damage to sprinkler connections or deformation of piping

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