Oil baffle device for side face sleeve transformer

Abstract

The invention discloses an oil baffle device for a side face sleeve transformer. The device is mainly used for the protection of transformer oil splashing and flowing after an explosion of the side face sleeve transformer, the device is arranged at a position of about 1.5-2 meters away from the outside of the side face sleeve transformer, the device comprises four components of a vertical movablefireproof oil baffle plate, a tilted movable fireproof oil baffle plate, a movable patrol door and a transformer explosion fire protection wall; the vertical movable fireproof oil baffle plate is supported by a prebuilt transformer fireproof wall or a newly-built transformer explosion fire protection wall; the tilted movable fireproof oil baffle plate is arranged at the two sides of a side face sleeve within a range larger than two meters; the movable patrol door is arranged on a patrol path or a fire fighting path which are located at the two sides of the transformer; and the transformer explosion fire protection wall is arranged at the two sides of an independent transformer or the two sides of two adjacent transformers.

Description

technical field [0001] The invention belongs to substation fire-fighting facilities, and in particular relates to a fire-proof protection technology for an oil retaining device of a side bushing transformer. Background technique [0002] For a long time, the fire protection design of the main transformer of the core equipment of the substation is mainly adopted in accordance with the specifications to set the fire protection distance between each main transformer, the firewall, and the main transformer shape within 1.0 ~ 1.5m to set the transformer oil storage tank and the oil storage tank oil discharge pipeline. Accident oil pools, etc. From the analysis of fire cases, the current standardized oil storage, oil discharge, and fire prevention facilities can only meet the requirements of part of the transformer oil storage, oil discharge, and fire protection after the explosion of the top bushing transformer, but cannot meet the requirements of the side. Fire protection requir...

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Problems solved by technology

[0002] For a long time, the fire protection design of the main transformer of the core equipment of the substation is mainly adopted in accordance with the specifications to set the fire protection distance between each main transformer, the firewall, and the main transformer shape within 1.0 ~ 1.5m to set the transformer oil storage tank and the oil storage tank oil discharge pipeline. Accident oil pools, etc. From the analysis of fire cases, the current standardized oil storage, oil discharge, and fire prevention facilities can only meet the requirements of part of the transformer oil storage, oil discharge, and fire protection after the explosion of the top bushing transformer, but cannot meet the requirements of the side. Fire protection requirements for bushing transformers

[0003] On July 22, 2015, a serious explosion occurred in the high-voltage bushing and rising seat of the 1# main transformer phase A 250MVA transformer of the side bushing structure of a 500kV substation in a city in Yunnan Province, and the transformer high-voltage bushing and rising seat were all blown away. The transformer parts smashed the pipe network of the transformer water spray fire extinguishing system at the same time, causing the water spray fire extinguishing system to fail. The farthest transformer part flew out of the transformer 50m away, and fell to the ground after hitting the outdoor wall of the 500kV power distribution device. A large amount of transformer oil is sprayed from the connection between the rising seat of the high-voltage bushing and the body, and the splash range exceeds 40-50m. If there is no firewall to separate, the surrounding transformers are likely to spread fire

The accidental transformer caught fire at 1:22 am on the 22nd. The fire brigade arrived at the substation fire scene at 2:25. At 55 minutes, the accidental transformer and the surrounding area were extinguished. All fires were extinguished at 5 o'clock in the morning. The fire lasted for 4 hours and 40 minutes, and the fire extinguishing time was 2 hours. , a small amount of flowing transformer oil is discharged outside the station through the road and site drainage system, causing water pollution in the surrounding environment

[0004] It can be seen from the above fire cases that the side bushing transformer explosion fire is a common fire type in transformer fires, especially when a serious explosion fire occurs, because the transformer side bushings and rising seats and other components are blown away, splashing The amount of flowing transformer oil exceeds 80% of the total oil amount of the transformer, of which, 10-20% of the total oil amount accounts for 10-20% of the total oil amount. , the transformer firewall is an indispensable component for fire protection of side bushing transformers, and in order to prevent transformer oil from splashing, anti-splashing measures must be taken; accounting for 60-70% of the total oil volume, transformer oil flows to the side of the transformer side bushing The oil storage tank, transformer site and main transformer transportation road are beyond the protection range of the transformer oil storage tank and the oil discharge system, causing a large area of ​​splashing and flowing fire, which not only leads to the failure of the transformer fire extinguishing system, but also increases the difficulty of fire extinguishing, and the fire continues The fire extinguishing time was 4 hours and 40 minutes, and the fire extinguishing time was 2 hours. The long-term fire extinguishing caused a lot of air pollution; after the fire brigade used water fire fighting facilities to extinguish the fire, the flowing transformer oil also caused serious pollution to the water around the substation; some areas used There are a large number of substations with side bushing transformers, and some of them are located in water source protection areas, reservoirs, and surrounding scenic areas. Once the above-mentioned explosions and fires occur, the losses will be incalculable

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