Superfine dry powder cold aerosol automatic fire-extinguishing system

Abstract

The invention discloses a superfine dry powder cold aerosol automatic fire-extinguishing system which comprises a fire extinguisher, a driving gas delivery conduit, spraying devices and a control device, wherein the fire extinguisher comprises a gas storage device, a control valve assembly and a connecting pipeline, and the gas storage device is connected to the input end of the driving gas delivery conduit through the control valve and the connecting pipeline; a control valve assembly is controlled to open and close by the control device; the spraying devices are distributed in the protectedarea according to the engineering requirements; each spraying device is provided with a powder storage tank; the powder storage tank is connected to the output end of the driving gas delivery conduitthrough a first control valve; the powder storage tank is provided with a spraying outlet which is provided with a second control valve; and the first and second control valves are controlled to openor close in a pneumatic or electric mode. Compared with the prior art, the fire-extinguishing system of the invention has the advantages of simple structure, favorable fire extinguishing effect, low engineering investment and low maintenance expense.

Description

technical field [0001] The invention relates to a fire-fighting system, in particular to an automatic fire-extinguishing system of superfine dry powder cold aerosol. Background technique [0002] Cold aerosol fire extinguishing is a new type of fire extinguishing method. It has good fire extinguishing effect, low cost, no secondary hazards, wide adaptability, and better technical performance than hot aerosol. It has great development prospects and commercial value. [0003] At present, fire-fighting companies such as Wuhan have launched a new type of "ultra-fine dry powder" pipe network automatic fire extinguishing system, which uses cold aerosol formed by ultra-fine dry powder to extinguish the fire. The principle of the fire extinguishing system is: designed according to the structure and working principle of the fixed dry powder fire extinguishing system , that is to use the high-pressure nitrogen in the gas storage cylinder group to enter the ultra-fine dry powder fire e...

AI Technical Summary

Problems solved by technology

[0004] This "ultrafine dry powder pipe network automatic fire extinguishing system" has a dry powder storage tank, resulting in a large room for placing steel cylinders; during fire extinguishing operation, nitrogen, ultrafine dry powder gas, and solid two-phase substances are in the delivery pipeline, and the pressure loss of the flow Larger, easy to produce dry powder deposition in pipes, pipe fittings, valves, etc., so the delivery pipeline should have a larger diameter, and can not be transported over a long distance; if the nitrogen pressure is increased to compensate, not only high-pressure delivery pipelines are required And it is necessary to increase the equipment of high-pressure gas storage cylinders, which increases the project investment, and the unit mass ratio of ultra-fine dry powder and nitrogen sprayed into the protection zone, the ratio of ultra-fine dry powder is relatively low, and the composition that plays the main role of fire extinguishing is less , will greatly reduce the fire extinguishing effect

After the system is sprayed to extinguish the fire, the conveying pipeline must be purged and cleaned, which is very laborious and laborious, and increases the maintenance cost

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