Combined distribution type oil discharge and nitrogen filling fire extinguishing system and fire extinguishing method

Abstract

The invention discloses a combined distribution type oil discharging and nitrogen inflating fire extinguishing system. The combined distribution type oil discharging and nitrogen inflating fire extinguishing system comprises a nitrogen gas source, a control cabinet, a fire disaster detector arranged on the top of each transformer, and a transformer oil storage control system with a gas relay, a transformer oil discharging system with an oil discharging control valve and a transformer nitrogen inflating system with a nitrogen inflating control valve which are arranged on each transformer; the transformer nitrogen inflating systems are connected with the nitrogen gas source; the fire disaster detectors, the gas relays, the oil discharging control valves and the nitrogen inflating control valves are electrically connected with the control cabinet; each nitrogen inflating system comprises a unidirectional throttling valve, a nitrogen inflating pipeline and a constant-temperature valve; each nitrogen inflating pipeline is communicated with the nitrogen gas source and penetrates through a transformer wall body at the lower side part of an oil storage cabinet to extent into the oil storage cabinet; and each constant-temperature valve is arranged on the corresponding nitrogen inflating pipeline in the oil storage cabinet, and each unidirectional throttling valve is arranged on the nitrogen inflating pipeline between the corresponding nitrogen inflating control valve and the corresponding transformer. The combined distribution type oil discharging and nitrogen inflating fire extinguishing system has a very good application value in industry.

Description

technical field [0001] The invention relates to the technical field of oil-immersed transformer fire protection, in particular to a combined distribution type oil discharge and nitrogen filling fire extinguishing system and a fire extinguishing method. Background technique [0002] Oil-immersed transformers are the core components of substations, and most substations use large-scale oil-immersed transformers as the main transformer. There is a large amount of transformer oil in the oil conservator of the oil-immersed transformer for insulation and heat dissipation. Under normal circumstances, the flash point of transformer oil is around 135°C. However, after the oil-immersed transformer has been used for a period of time, if the transformer has internal poor contact, inter-turn short circuit or overload operation, it will cause high temperature inside the oil conservator, and the high temperature will cause Crack transformer oil to produce flammable gases such as H2 and C2H...

AI Technical Summary

Problems solved by technology

However, since this solution does not solve the problem that after a period of use of fire detectors and gas relays, the rate of false alarms increases with the increase in use time. False alarms will cause the oil discharge and nitrogen charging device to malfunction, causing the main transformer to trip, resulting in large-scale accidents. Therefore, this solution is only a possibility of technical realization and has no industrial application value

[0009] To sum up, the existing technical scheme for fire extinguishing of multiple oil-immersed transformers by a control cabinet does not solve the problem that after a period of use of fire detectors and gas relays, the false alarm rate increases with the increase of use time , The false alarm will cause the oil discharge and nitrogen filling fire extinguishing device to malfunction, cause the main transformer to trip, and cause a large-scale sudden power outage. The technical problem is only a technical possibility and has no industrial application value.

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