Total flooding fire extinguishing device based on mixed fire extinguishing agent

Abstract

The invention provides a total flooding fire extinguishing device based on a mixed fire extinguishing agent, which comprises two containers provided with ejection ports, an AVD fire extinguishing agent and a gas fire extinguishing agent, the AVD fire extinguishing agent and the gas fire extinguishing agent are respectively stored in the containers by utilizing pressurized nitrogen, and the gas fire extinguishing agent has a cooling function. And during fire extinguishing, the control device firstly releases a gas fire extinguishing agent with a cooling function to the total flooding fire extinguishing space, and then the control device releases the AVD fire extinguishing agent to the total flooding fire extinguishing space. An AVD fire extinguishing agent and a gas fire extinguishing agent with a cooling function are pressurized through pressurized nitrogen and are stored in two containers respectively, the gas fire extinguishing agent with the cooling function is released firstly during fire extinguishing, and then the AVD fire extinguishing agent is released; the fire can be extinguished or controlled in time, so that harm expansion caused by fire spreading is inhibited, re-combustion of the lithium battery is continuously inhibited through the covering effect, and meanwhile, emission of fire smoke of the lithium battery is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of fire fighting and extinguishing, and relates to a total submerged fire extinguishing device based on mixed fire extinguishing agents, in particular to a total submerged fire extinguishing device based on mixed fire extinguishing agents for lithium batteries. Background technique [0002] In the existing fire extinguishing technologies for lithium batteries, most of the fire extinguishing agents use heptafluoropropane (HFC-227ea / FM200) or hexafluoropropane (HFC-236fa) fire extinguishing agents. [0003] Heptafluoropropane fire extinguishing agent is a clean gas fire extinguishing agent that is mainly chemical fire extinguishing and has physical cooling fire extinguishing effect. It is colorless, odorless, low-toxic, non-conductive, does not pollute the protected object, and will not cause damage to property and precision facilities; it can reliably extinguish Class B and C fires and electrical fires with a...

AI Technical Summary

Problems solved by technology

[0009] But because the viscosity coefficient of this AVD fire extinguishing agent is large, the resistance is very large when causing the flow in the fire extinguishing pipeline in its fire extinguishing device, so greatly cause the pressure loss when this AVD fire extinguishing agent extinguishes a fire, so that it atomizes and dissolves when it is released to the fire extinguishing space The diffusion performance is reduced, and it is impossible to quickly reach the distant ignition point; at the same time, most of the existing lithium battery fire extinguishing methods adopt the full flooding fire extinguishing method, so the AVD fire extinguishing agent device is not conducive to quickly suppressing the initial lithium battery fire.

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